CHEMISTRY- PAGE 9
1. Name the gas that can readily decolourise acidified KMnO4 solution :
(1) SO2
(2) NO2
(3) P2O5
(4) CO2
Ans: 1
2. The heating of phenyl-methyl ethers with HI produces
(1) Iodobenzene
(2) Phenol
(3) Benzene
(4) Ethyl chlorides
Ans: 2
3. Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?
(1) K
(2) Rb
(3) Li
(4) Na
Ans: 3
4. The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is :
(1) Chromotagraphy
(2) Crystallisation
(3) Steam distillation
(4) Sublimation
Ans: 3
5. Mixture of chloroxylenol and terpineol acts as :
(1) Antiseptic
(2) Antipyretic
(3) Antibiotic
(4) Analgesic
Ans: 1
6. An example of a sigma bonded organometallic compound is :
(1)Grignard’s reagent
(2) Ferrocene
(3) Cobaltocene
(4) Ruthenocene
Ans: 1
7. Which is the incorrect statement ?
(1)Density decreases in case of crystal with Schottky’s defect
(2) NaCl (s ) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal
(3) Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal
(4) FeO0 has non stoichiometric metal deficiency defect
Ans: 3
8. The species, having bond angles of 120 deg is :-
(1) ClF3
(2) NCl3
(3) BCl3
(4) PH3
Ans: 3
9. Which of the following is a sink for CO?
(1) Micro organism present in the soil
(2) Oceans
(3) Plants
(4) Haemoglobin
Ans: 1
10. If molality of the dilute solutions is doubled, the value of molal depression constant K (f ) will be :-
(1) Halved
(2) Tripled
(3) Unchanged
(4) Doubled
Ans: 3
11. Which of the following is dependent on temperature ?
(1) Molarity
(2) Mole fraction
(3) Weight percentage
(4) Molality
Ans: 1
12. Which one of the following statements is not correct ?
(1) The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
(2) Enzymes catalys mainly bio-chemical reactions
(3) Coenzymes increase the catalytic activity of enzyme
(4) Catalyst does not initiate any reaction
Ans: 1
13. The correct statement regarding electrophile is :-
(1) Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
(2) Electrophiles are generally neutral species and can form a bond by accepting pair of electrons from a nucleophile
(3) Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
(4) Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
Ans: 3
14. Which of the following reaction is appropriate for converting acetamide to methanamine ?
(1) Hoffmarnn hypobromamide reaction
(2) Stephens reaction
(3) Gabriels phithalimide synthesis
(4) Carbylamine reaction
Ans: 1
15. With respect to the conformers of ethane, which of the following statements is true ?
(1) Bond angle changes but bond length remains same
(2) Both bond angle and bond length change
(3) Both bond angles and bond length remains same
(4) Bond angle remains same but bond length changes
Ans: 3
16. Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:-
(1) Distillation
(2) Zone reflining
(3) Displacement with Zn
(4) Liquation
Ans: 3
17. Which of the following statements is not correct :
(1) Ovalbumin is a simple food reserve in egg-white
(2) Blood proteins thrombin and fibrinogen are involved in blood clotting
(3) Denaturation makes the proteins more active
(4) Insulin maintains sugar level in the blood of a human body
Ans: 3
(1) SO2
(2) NO2
(3) P2O5
(4) CO2
Ans: 1
2. The heating of phenyl-methyl ethers with HI produces
(1) Iodobenzene
(2) Phenol
(3) Benzene
(4) Ethyl chlorides
Ans: 2
3. Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?
(1) K
(2) Rb
(3) Li
(4) Na
Ans: 3
4. The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is :
(1) Chromotagraphy
(2) Crystallisation
(3) Steam distillation
(4) Sublimation
Ans: 3
5. Mixture of chloroxylenol and terpineol acts as :
(1) Antiseptic
(2) Antipyretic
(3) Antibiotic
(4) Analgesic
Ans: 1
6. An example of a sigma bonded organometallic compound is :
(1)Grignard’s reagent
(2) Ferrocene
(3) Cobaltocene
(4) Ruthenocene
Ans: 1
7. Which is the incorrect statement ?
(1)Density decreases in case of crystal with Schottky’s defect
(2) NaCl (s ) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal
(3) Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal
(4) FeO0 has non stoichiometric metal deficiency defect
Ans: 3
8. The species, having bond angles of 120 deg is :-
(1) ClF3
(2) NCl3
(3) BCl3
(4) PH3
Ans: 3
9. Which of the following is a sink for CO?
(1) Micro organism present in the soil
(2) Oceans
(3) Plants
(4) Haemoglobin
Ans: 1
10. If molality of the dilute solutions is doubled, the value of molal depression constant K (f ) will be :-
(1) Halved
(2) Tripled
(3) Unchanged
(4) Doubled
Ans: 3
11. Which of the following is dependent on temperature ?
(1) Molarity
(2) Mole fraction
(3) Weight percentage
(4) Molality
Ans: 1
12. Which one of the following statements is not correct ?
(1) The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
(2) Enzymes catalys mainly bio-chemical reactions
(3) Coenzymes increase the catalytic activity of enzyme
(4) Catalyst does not initiate any reaction
Ans: 1
13. The correct statement regarding electrophile is :-
(1) Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
(2) Electrophiles are generally neutral species and can form a bond by accepting pair of electrons from a nucleophile
(3) Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
(4) Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
Ans: 3
14. Which of the following reaction is appropriate for converting acetamide to methanamine ?
(1) Hoffmarnn hypobromamide reaction
(2) Stephens reaction
(3) Gabriels phithalimide synthesis
(4) Carbylamine reaction
Ans: 1
15. With respect to the conformers of ethane, which of the following statements is true ?
(1) Bond angle changes but bond length remains same
(2) Both bond angle and bond length change
(3) Both bond angles and bond length remains same
(4) Bond angle remains same but bond length changes
Ans: 3
16. Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:-
(1) Distillation
(2) Zone reflining
(3) Displacement with Zn
(4) Liquation
Ans: 3
17. Which of the following statements is not correct :
(1) Ovalbumin is a simple food reserve in egg-white
(2) Blood proteins thrombin and fibrinogen are involved in blood clotting
(3) Denaturation makes the proteins more active
(4) Insulin maintains sugar level in the blood of a human body
Ans: 3
18:-Which of the following secondary metabolite is used as an anticancer drug derived from the bark of Yew trees?
A:-Camptothecin B:-Taxol C:-Cochicine D:-Vincristine
Ans: B
19:-Which of the following medium is used to select the heterokaryon hybridoma cell in hybridoma technology?
A:-Hydroxy urea, aminopterine, thymidine
B:-Hypoxanthine, acetaminophen, thymidine
C:-Hypoxanthine, aminopterine, thiourea
D:-Hypoxanthine, aminopterine, thymidine
Ans: D
20:-Polyacrylamide and agarose gel electrophoresis separate nucleic acids based primarily on their
A:-Length
B:-Ratio of mass/charge
C:-(G+C)/(A+T) content
D:-Organismal origin
Ans: A
21:-How many significant figures are present in the number 0.0025?
A:-5
B:-4
C:-2
D:-6
Ans: C
22:-The expansion of DSC is
A:-Differential Scanning Calorimetry
B:-Differential Scanning Coulometry
C:-Differential Spinning Calorimetry
D:-Differential Spinning Coulometry
Ans: A
23:-The property measured in TGA is
A:-Change in weight
B:-Rate of change in weight
C:-Heat evolved or absorbed
D:-Change in temperature
Ans: A
24:-In Freundlich Adsorption Isotherm the value of 1/n is
A:-1 in case of physical adsorption
B:-1 in case of chemical adsorption
C:-Between 0 and 1 in all cases
D:-Between 0 and 2 in all cases
Ans: C
25:-The light microscope that is often used to view internal structures of living cells without staining is
A:-Dark-field microscope
B:-Bright-field microscope
C:-Fluorescence microscope
D:-Phase-contrast microscope
Ans: D
26:-Which of the following compound is elevated in response to plant experience a water stress?
A:-Myoinositol B:-Galactinol C:-Raffinose D:-Proline betaine
Ans: D
27:-The molecule which is IR inactive but Raman active is
A:-`"N_2"`
B:-`"HCl"`
C:-`"SO_2"`
D:-Protein
Ans: A
28:-The ESR of Naphthalene radical anion consists of
A:-15 lines
B:-25 lines
C:-30 lines
D:-40 lines
Ans: B
29:-Maple syrup urine disease is a deficiency of which amino acid degradative pathway?
A:-Tyrosine B:-Leucine C:-Tryptophan D:-Arginine
Ans: B
30:-What is the main factor on which chemical shift depends in Mossbauer spectrum?
A:-Electron density B:-Transition energy C:-Intensity of light D:-All of these
Ans: A
31:-The confinement in a Quantum wire is
A:-0 D B:-2 D C:-1 D D:-3 D
Ans: B
32:-The expansion of 'SPR' is
A:-Surface Plasmon Resonance B:-Surface Proton Resonance
C:-Structural Plasmon Resonance D:-Structural Proton Resonance
Ans: A
33:-Quantum dots are
A:-1 dimensional B:-0 dimensional C:-3 dimensional D:-2 dimensional
Ans: B
34:-Dip-Pen nanolithography works with the help of
A:-TEM B:-SEM C:-AFM D:-EDAX
Ans: C
35:-The chemical bonds of carbon nanotube is composed of
A:-`"sp"` bonds B:-`"sp^2"` bonds C:-`"sp^3"` bonds D:-none of these
Ans: B
36:-The polar groups in cation-exchange resins are
A:-acidic B:-basic C:-neutral D:-none of these
Ans: A
37:-In Chromatography `R_f` value
A:-`(text {Distance moved by the solute})/(text {Distance moved by the solvent})`
B:-`(text {Distance moved by the solvent})/(text {Distance moved by the solute})`` `
C:-`(text {Distance moved by the solute})/(text {Distance moved by the solution})`
D:-`(text {Distance moved by the solution})/(text {Distance moved by the solute})`
Ans: A
38:-In which of the following techniques the mobile phase is a gas?
A:-HPLC B:-GC C:-TLC D:-Ion-Exchange Chromatography
Ans: B
39:-During photosynthesis, which of the followings acts as a reservoir for hydrogen ions?
A:-Cristae B:-Stroma C:-Thylakoid space D:-Matrix
Ans: C
40:-The process of recovery of the constituents from the chromatogram is called
A:-Dilution B:-Elution C:-Eluent D:-Recoveration
Ans: B
41:-Iron-sulphur clusters in biological systems are involved in
A:-proton transfer B:-atom transfer C:-group transfer D:-electron transfer
Ans: D
42:-The metal present in carbonic anhydrase is
A:-Mn B:-Zn C:-Mg D:-Cu
Ans: B
43:-What is not true about Ferredoxins?
A:-Involved in oxidation of ```"{NH_3}"` B:-Generate `"{H_2}"` from acid solution
C:-Reduction potential is from 0 to +0.5 V D:-It is Fe-S protein
Ans: C
44:-Cytochromes acts as
A:-Two electron transfer agents B:-One electron transfer agents
C:-Multi electron transfer agents D:-None of these
Ans: B
45:-Nitrogenase contains
A:-Fe, Mo B:-Mg, Fe C:-Fe, Zn D:-Fe, Cu
Ans: A
46:-A deficiency in which of the following amino acids will result in the negative nitrogen balance, even though the diet may contain a large amount of protein
A:-Alanine B:-Serine
C:-Glutamate D:-Tryptophan
Ans: D
47:-The interior of β-cyclodextrin is
A:-hydrophobic B:-hydrophilic
C:-hydrophobic and hydrophilic D:-none of these
Ans: B
48:-γ-cyclodextrin (γ-CD) contains
A:-eight glucose units B:-seven glucose units
C:-six glucose units D:-five glucose units
Ans: A
49:-Calixarenes are synthetic compounds which are made by cyclooligomerization of
A:-Amines B:-Phenols
C:-Ketones D:-Amides
Ans: B
50:-Macromolecules which are made up of two or more rings held together as links in a chain are called
A:-Catenanes B:-Rotaxanes C:-Cyclodextrins D:-Calixarenes
Ans: B
A:-Camptothecin B:-Taxol C:-Cochicine D:-Vincristine
Ans: B
19:-Which of the following medium is used to select the heterokaryon hybridoma cell in hybridoma technology?
A:-Hydroxy urea, aminopterine, thymidine
B:-Hypoxanthine, acetaminophen, thymidine
C:-Hypoxanthine, aminopterine, thiourea
D:-Hypoxanthine, aminopterine, thymidine
Ans: D
20:-Polyacrylamide and agarose gel electrophoresis separate nucleic acids based primarily on their
A:-Length
B:-Ratio of mass/charge
C:-(G+C)/(A+T) content
D:-Organismal origin
Ans: A
21:-How many significant figures are present in the number 0.0025?
A:-5
B:-4
C:-2
D:-6
Ans: C
22:-The expansion of DSC is
A:-Differential Scanning Calorimetry
B:-Differential Scanning Coulometry
C:-Differential Spinning Calorimetry
D:-Differential Spinning Coulometry
Ans: A
23:-The property measured in TGA is
A:-Change in weight
B:-Rate of change in weight
C:-Heat evolved or absorbed
D:-Change in temperature
Ans: A
24:-In Freundlich Adsorption Isotherm the value of 1/n is
A:-1 in case of physical adsorption
B:-1 in case of chemical adsorption
C:-Between 0 and 1 in all cases
D:-Between 0 and 2 in all cases
Ans: C
25:-The light microscope that is often used to view internal structures of living cells without staining is
A:-Dark-field microscope
B:-Bright-field microscope
C:-Fluorescence microscope
D:-Phase-contrast microscope
Ans: D
26:-Which of the following compound is elevated in response to plant experience a water stress?
A:-Myoinositol B:-Galactinol C:-Raffinose D:-Proline betaine
Ans: D
27:-The molecule which is IR inactive but Raman active is
A:-`"N_2"`
B:-`"HCl"`
C:-`"SO_2"`
D:-Protein
Ans: A
28:-The ESR of Naphthalene radical anion consists of
A:-15 lines
B:-25 lines
C:-30 lines
D:-40 lines
Ans: B
29:-Maple syrup urine disease is a deficiency of which amino acid degradative pathway?
A:-Tyrosine B:-Leucine C:-Tryptophan D:-Arginine
Ans: B
30:-What is the main factor on which chemical shift depends in Mossbauer spectrum?
A:-Electron density B:-Transition energy C:-Intensity of light D:-All of these
Ans: A
31:-The confinement in a Quantum wire is
A:-0 D B:-2 D C:-1 D D:-3 D
Ans: B
32:-The expansion of 'SPR' is
A:-Surface Plasmon Resonance B:-Surface Proton Resonance
C:-Structural Plasmon Resonance D:-Structural Proton Resonance
Ans: A
33:-Quantum dots are
A:-1 dimensional B:-0 dimensional C:-3 dimensional D:-2 dimensional
Ans: B
34:-Dip-Pen nanolithography works with the help of
A:-TEM B:-SEM C:-AFM D:-EDAX
Ans: C
35:-The chemical bonds of carbon nanotube is composed of
A:-`"sp"` bonds B:-`"sp^2"` bonds C:-`"sp^3"` bonds D:-none of these
Ans: B
36:-The polar groups in cation-exchange resins are
A:-acidic B:-basic C:-neutral D:-none of these
Ans: A
37:-In Chromatography `R_f` value
A:-`(text {Distance moved by the solute})/(text {Distance moved by the solvent})`
B:-`(text {Distance moved by the solvent})/(text {Distance moved by the solute})`` `
C:-`(text {Distance moved by the solute})/(text {Distance moved by the solution})`
D:-`(text {Distance moved by the solution})/(text {Distance moved by the solute})`
Ans: A
38:-In which of the following techniques the mobile phase is a gas?
A:-HPLC B:-GC C:-TLC D:-Ion-Exchange Chromatography
Ans: B
39:-During photosynthesis, which of the followings acts as a reservoir for hydrogen ions?
A:-Cristae B:-Stroma C:-Thylakoid space D:-Matrix
Ans: C
40:-The process of recovery of the constituents from the chromatogram is called
A:-Dilution B:-Elution C:-Eluent D:-Recoveration
Ans: B
41:-Iron-sulphur clusters in biological systems are involved in
A:-proton transfer B:-atom transfer C:-group transfer D:-electron transfer
Ans: D
42:-The metal present in carbonic anhydrase is
A:-Mn B:-Zn C:-Mg D:-Cu
Ans: B
43:-What is not true about Ferredoxins?
A:-Involved in oxidation of ```"{NH_3}"` B:-Generate `"{H_2}"` from acid solution
C:-Reduction potential is from 0 to +0.5 V D:-It is Fe-S protein
Ans: C
44:-Cytochromes acts as
A:-Two electron transfer agents B:-One electron transfer agents
C:-Multi electron transfer agents D:-None of these
Ans: B
45:-Nitrogenase contains
A:-Fe, Mo B:-Mg, Fe C:-Fe, Zn D:-Fe, Cu
Ans: A
46:-A deficiency in which of the following amino acids will result in the negative nitrogen balance, even though the diet may contain a large amount of protein
A:-Alanine B:-Serine
C:-Glutamate D:-Tryptophan
Ans: D
47:-The interior of β-cyclodextrin is
A:-hydrophobic B:-hydrophilic
C:-hydrophobic and hydrophilic D:-none of these
Ans: B
48:-γ-cyclodextrin (γ-CD) contains
A:-eight glucose units B:-seven glucose units
C:-six glucose units D:-five glucose units
Ans: A
49:-Calixarenes are synthetic compounds which are made by cyclooligomerization of
A:-Amines B:-Phenols
C:-Ketones D:-Amides
Ans: B
50:-Macromolecules which are made up of two or more rings held together as links in a chain are called
A:-Catenanes B:-Rotaxanes C:-Cyclodextrins D:-Calixarenes
Ans: B
51:-Which of the following is an example of a restriction site that shows two-fold rotational symmetry?
A:-ATTA B:-ATAATA C:-ATAT D:-ATTTTA
Ans: C
52:-'Zeolites' is a broad term used to describe a family of minerals called
A:-Trisilicates B:-Pentasilicates C:-Tetrasilicates D:-Tectosilicates
Ans: D
53:-"Clayan" is a non-metallic oxidative green reagent composed of
A:-Clay Supported Ammonium Nitrate
B:-Clay Supported Aluminium Nitrate
C:-Clay Supported Ammonium Nitrite
D:-Clay Supported Aluminium Nitrite
Ans: A
54:-The phosphorescence is due to the transition from
A:-Singlet → Singlet B:-Singlet → Triplet C:-Triplet → Singlet D:-Triplet → Triplet
Ans: C
55:-The quantum yield of photochemical chlorination of methane is
A:-< 1 B:-1 C:-> 1 D:-0
Ans: C
56:-Which of the following plant hormone is responsible for the formation of quiescent centre in root apical meristem?
A:-Auxin B:-Cytokinin C:-Gibberlin D:-Ethylene
Ans: A
57:-Which of the following repair system use blue light energy to correct the errors?
A:-Direct repair B:-Nucleotide excision repair
C:-Mismatch repair D:-Recombination repair
Ans: A
58:-Glycoproteins
A:-contain oligosaccharides linked to the side chain of lysine or histidine residues
B:-contain oligosaccharides linked to the side chain of asparagine, serine, or threonine residues
C:-bind to liver cell-surface receptors that recognize sialic acid residues
D:-are mostly cytoplasmic proteins
Ans: B
59. All reactions, which have chemical disintegration are ________.
(A) Exothermic (B) Reversible and exothermic
(C) Reversible or Irreversible and endothermic or exothermic (D) Reversible
Ans: C
60:-Which of the following decreases with increase in concentration?
A:-Conductance B:-Specific conductance
C:-Equivalent conductance D:-Molar conductance
Ans: B
61:-Phosphofructokinase 2, a bifunctional enzyme can regulate glycolytic pathway. Which of the following statement is correct regarding this enzyme?
I. Kinase activity is active in their phosphorylated form
II. Kinase activity is active in their dephosphorylated form
III. Phosphatase activity is active in their phosphorylated form
IV. Phosphatase activity is active in their dephosphorylated form
A:-I & III B:-I & IV
C:-II & III D:-II & IV
Ans: C
62:-Aspartate transcabamoylase is an example of allosteric enzyme and it contains 6 regulatory and 6 catalytic subunits. Which of the following is correct about his enzyme?
I. ATP is an allosteric activator of this enzyme
II. ATP is an allosteric inhibitor of this enzyme
III. The subunit composition of ATCase is `"3C_22R_3"`
IV. The subunit composition of ATCase is `"2C_33R_2"`
A:-I and III
B:-I and IV
C:-II and III
D:-II and IV
Ans: B
63:-Gluconeogenesis pathway can produce glucose from noncarbohydrate precursors. This pathway occurs in which of the following sub cellular compartment/s?
A:-Cytosol
B:-Cytosol and mitochondria
C:-Cytosol and endoplasmic reticulum
D:-Cytosol, mitochondria and endoplasmic reticulum
Ans: D
64:-Thymidylate synthase catalyse the conversion of dUMP to dTMP, which of the following donate the methyl group?
A:-Methyl THF B:-Methylene THF C:-Formyl THF D:-SAM
Ans: B
65:-Suppose the number of carbon rings in an `"F_0/F_1"` ATP synthase is 12. Then the value of P/O ratio for NADH, `"H^+"` and `"FADH_2"` respectively are
A:-2 and 1.2 B:-2.5 and 1.5 C:-3 and 2 D:-1.5 and 2.5
Ans: A
66:-Which of the following operon use its regulatory gene product as a transcriptional activator and repressor?
A:-Lac operon B:-Galactose operon C:-Arabinose operon D:-Tryptophan operon
Ans: C
67:-Mixed inhibition and non-competitive inhibition are of two types of reversible inhibition. Which of the following is correct related to these inhibitions?
A:-In both mixed inhibition and non-competitive inhibition `"V_m_a_x"` decreases and Km increases
B:-In mixed inhibition `"V_m_a_x"` decreases and Km increases, in non-competitive inhibition `"V_m_a_x"` decreases and Km unchanged C:-In both mixed inhibition and non-competitive inhibition `"V_m_a_x"` and Km decreases
D:-In mixed inhibition `"V_m_a_x"` decreases and Km decreases, in non-competitive inhibition `"V_m_a_x"` decreases and Km increases Ans: B
68:-Which of the following RNA molecule is NOT a ribozyme?
A:-28S rRNA B:-5S rRNA
C:-RNA part of RNase P D:-Hammer head RNA
Ans: B
69:-Carbonic anhydrase enzyme catalyse the production of carbonic acid from water and `"CO_2"` . Which of the following is correct related to this enzyme?
A:-Carbonic anhydrase decreases the `"pK_a"` value of water
B:-Carbonic anhydrase increases the `"pK_a"` value of water
C:-`"K^+"` is the cofactor of carbonic anhydrase
D:-`"Ca^2^+"` is the cofactor of carbonic anhydrase
Ans: A
70:-Which of the following is the ratio of phospholipid : sphingomyelin : cholesterol in a normal eukaryotic cell plasma membrane? A:-1:1:1 B:-1.5:0.5:1
C:-0.5:1.5:1 D:-1:0.5:1.5
Ans: B
71:-The absorption of ultraviolet (UV) light (the absorbance at 280 nm) is often used as a measure of protein concentration. The R-groups of which amino acids contribute most to absorption of 280 nm light?
A:-Ser, Thr, Cys B:-Lys, Arg, His C:-Trp, Tyr, Phe D:-Ser, Ala, Glu
Ans: C
72:-In a eukaryotic cell plasma membrane, different phospholipid preferentially localized to either cytosolic side or exoplasmic side. Which of the following is the correct orientation of phospholipids like phosphatidyl choline and phosphatidyl inositol in cytosolic and exoplasmic side?
A:-Both are cytosolic
B:-Both are exoplasmic
C:-Phosphatidyl choline is localized to cytosolic and phosphatidyl inositol is localized to exoplasmic
D:-Phosphatidyl inositol is localized to cytosolic and phosphatidyl choline is localized to exoplasmic
Ans: D
73:-Which of the following cyclin is responsible to activate CDK4 and CDK6 to pass the cell cycle from G1 phase?
A:-Cyclin A B:-Cyclin B C:-Cyclin D D:-Cyclin E
Ans: C
74:-Which of the following transposons is an example of non autonomous transposon?
A:-Ac elements in maize B:-Ds elements in maize C:-P elements in drosophila D:-IS elements in bacteria
Ans: B
75:-`"Na^+/K^+"` pump utilize ATP hydrolysis to pump `3"Na^+"` to the extracellular side and 2 `"K^+"` to the intracellular side and generate an electric potential to the cell. This pump belong to
A:-F type pump B:-V type pump C:-P type pump D:-ABC type pump
Ans: C
76:-Which monomeric G proteins are involved in the formation of filopodium, lamellipodium and stress fibers?
A:-Filopodium - cdc42, Lamellipodium - Rac, Stress fibers - Rho
B:-Filopodium - Rac, Lamellipodium - cdc42, Stress fibers - Rho
C:-Filopodium - Rho, Lamellipodium - Rac, Stress fibers - cdc42
D:-None of the above
Ans: A
77:-Apoptosis (programmed cell death) executed by the action of caspase enzyme in intrinsic and extrinsic pathway of apoptosis. Which of the following caspase is involved in intrinsic pathway of apoptosis?
A:-Proteolytic cleavage of procaspase to caspase 9
B:-Dimerisation of procaspase to caspase 9
C:-Proteolytic cleavage of procaspase to caspase 8
D:-Dimerisation of procaspase to caspase 8
Ans: B
78:-Which of the following ligand and receptor correctly matches?
A. Epinephrine - (i) HER (RTK)
B. EGF - (ii) Frizzled
C. Bacteria - (iii) GPCR
D. Wnt - (iv) TLR
A:-A - iii, B - i, C - iv, D - ii B:-A - ii, B - iii, C - iv, D - i
C:-A - iii, B - iv, C - i, D - ii D:-A - iv, B - i, C - iii, D - ii
Ans: A
79:-Replication in both prokaryotes and eukaryotes occur only in 5' → 3' direction. Which of the following reason for that?
A:-Primer addition is not possible B:-Okazaki fragments not possible
C:-Leading strand synthesis is not possible D:-Proofreading is not possible
Ans: D
80:-Which of the following protein are involved in the development of dorsal side of the embryo?
A:-Decapentaplegic and tolloid B:-Dorsal and fgf 8
C:-Bicoid and hunchback D:-Nanos and Caudal
Ans: A
81:-Which of the following photosystem locate in the appressed (stalked) portion of thylakoid membrane?
A:-Photosystem I B:-Photosystem II C:-Cyt bf complex D:-Light harvesting complex I
Ans: B
82:-Which of the following RNA polymerase is involved in the synthesis of RNA part of `"U_6"` spliceosome?
A:-RNA polymerase I B:-RNA polymerase II C:-RNA polymerase III D:-RNA polymerase IV
Ans: C
83:-Plant secondary metabolite flavonoids are derived from the amino acid phenylalanine. Which of the following is the precursor of flavonoids synthesizing pathway?
A:-Chorismate B:-Enol pyruvate shikimate pathway C:-Prephenate D:-Chalcone
Ans: D
84:-Which of the following amino acid use a single codon for the translation of proteins in humans?
A:-Alanine B:-Histidine C:-Valine D:-Tryptophan
Ans: D
85. Which of the following orbital is associated with n = 5, l = 3 ?
(a) 5p (b) 5d (c) 5f (d) 5s
Ans: C
86. The effective nuclear charge realized by 1s electron of helium atom is
(a) 0.70 (b) 0.30 (c) 2.00 (d) 1.70
Ans: D
87. The total number of orbitals in/associated with principal quantum number n = 4 are
(a) 12 (b) 14 (c) 16 (d) 8
Ans: C
88. Four elements A, B, C and D have the following atomic numbers : A = 3, B = 8, C = 10 and D = 6 Which of the above element would have highest ionization enthalpy ?
(a) A (b) B (c) C (d) D
Ans: C
89. Which of the following factors affect the ionization potential of an element ?
(a) Atomic size (b) Nuclear charge (c) Shielding effect (d) All of these
Ans: D
90. Gama rays are :
(a) High energy proton (b) High energy electron
(c) High energy electromagnetic waves (d) Low energy electromagnetic waves
Ans: C
91. What is the purpose of the salt bridge in a voltaic cell ?
(a) It allows electron flow. (b) It prevents electron flow. (c) It allows ion migration. (d) It prevents ion migration.
Ans: C
92. Arrange the following elements in increasing order of their electronegativity :
(a) Li < Na < K < Cs (b) Cs < K < Na < Li
(c) Na < K < Li < Cs (d) K < Li < Na < Cs
Ans: B
93. Which of the following oxides is amphoteric ?
(a) MgO (b) CaO (c) BeO (d) BaO
Ans: C
94. Indicate the element which does not form hydride by direct heating with dihydrogen ?
(a) Ba (b) Be (c) Sr (d) Mg
Ans: B
95. Trans uranium elements belong to which block ?
(a) d (b) f (c) p (d) s
Ans: B
96. Which of the following is semi-metal ?
(a) Ga (b) In (c) B (d) Th
Ans: C
97. Iodine does not react with
(a) Phosphorous (b) Sulphur (c) Fluorine (d) Nitric Acid
Ans: B
98. Identify the ore of zinc which contains carbonate.
(a) Malachite (b) Cerussite (c) Zincite (d) Calamine
Ans: D
99. A blast furnace may be used to extract iron from haematite ore. The principal reducing agent in the blast furnace is
(a) O2 (b) CO (c) NO (d) SO2
Ans: B
100. If 75% of any given amount of a radioactive substance disintegrates in 1 hour, then its half life period will be
(a) 90 minutes (b) 75 minutes (c) 30 minutes (d) 45 minutes
Ans: C
A:-ATTA B:-ATAATA C:-ATAT D:-ATTTTA
Ans: C
52:-'Zeolites' is a broad term used to describe a family of minerals called
A:-Trisilicates B:-Pentasilicates C:-Tetrasilicates D:-Tectosilicates
Ans: D
53:-"Clayan" is a non-metallic oxidative green reagent composed of
A:-Clay Supported Ammonium Nitrate
B:-Clay Supported Aluminium Nitrate
C:-Clay Supported Ammonium Nitrite
D:-Clay Supported Aluminium Nitrite
Ans: A
54:-The phosphorescence is due to the transition from
A:-Singlet → Singlet B:-Singlet → Triplet C:-Triplet → Singlet D:-Triplet → Triplet
Ans: C
55:-The quantum yield of photochemical chlorination of methane is
A:-< 1 B:-1 C:-> 1 D:-0
Ans: C
56:-Which of the following plant hormone is responsible for the formation of quiescent centre in root apical meristem?
A:-Auxin B:-Cytokinin C:-Gibberlin D:-Ethylene
Ans: A
57:-Which of the following repair system use blue light energy to correct the errors?
A:-Direct repair B:-Nucleotide excision repair
C:-Mismatch repair D:-Recombination repair
Ans: A
58:-Glycoproteins
A:-contain oligosaccharides linked to the side chain of lysine or histidine residues
B:-contain oligosaccharides linked to the side chain of asparagine, serine, or threonine residues
C:-bind to liver cell-surface receptors that recognize sialic acid residues
D:-are mostly cytoplasmic proteins
Ans: B
59. All reactions, which have chemical disintegration are ________.
(A) Exothermic (B) Reversible and exothermic
(C) Reversible or Irreversible and endothermic or exothermic (D) Reversible
Ans: C
60:-Which of the following decreases with increase in concentration?
A:-Conductance B:-Specific conductance
C:-Equivalent conductance D:-Molar conductance
Ans: B
61:-Phosphofructokinase 2, a bifunctional enzyme can regulate glycolytic pathway. Which of the following statement is correct regarding this enzyme?
I. Kinase activity is active in their phosphorylated form
II. Kinase activity is active in their dephosphorylated form
III. Phosphatase activity is active in their phosphorylated form
IV. Phosphatase activity is active in their dephosphorylated form
A:-I & III B:-I & IV
C:-II & III D:-II & IV
Ans: C
62:-Aspartate transcabamoylase is an example of allosteric enzyme and it contains 6 regulatory and 6 catalytic subunits. Which of the following is correct about his enzyme?
I. ATP is an allosteric activator of this enzyme
II. ATP is an allosteric inhibitor of this enzyme
III. The subunit composition of ATCase is `"3C_22R_3"`
IV. The subunit composition of ATCase is `"2C_33R_2"`
A:-I and III
B:-I and IV
C:-II and III
D:-II and IV
Ans: B
63:-Gluconeogenesis pathway can produce glucose from noncarbohydrate precursors. This pathway occurs in which of the following sub cellular compartment/s?
A:-Cytosol
B:-Cytosol and mitochondria
C:-Cytosol and endoplasmic reticulum
D:-Cytosol, mitochondria and endoplasmic reticulum
Ans: D
64:-Thymidylate synthase catalyse the conversion of dUMP to dTMP, which of the following donate the methyl group?
A:-Methyl THF B:-Methylene THF C:-Formyl THF D:-SAM
Ans: B
65:-Suppose the number of carbon rings in an `"F_0/F_1"` ATP synthase is 12. Then the value of P/O ratio for NADH, `"H^+"` and `"FADH_2"` respectively are
A:-2 and 1.2 B:-2.5 and 1.5 C:-3 and 2 D:-1.5 and 2.5
Ans: A
66:-Which of the following operon use its regulatory gene product as a transcriptional activator and repressor?
A:-Lac operon B:-Galactose operon C:-Arabinose operon D:-Tryptophan operon
Ans: C
67:-Mixed inhibition and non-competitive inhibition are of two types of reversible inhibition. Which of the following is correct related to these inhibitions?
A:-In both mixed inhibition and non-competitive inhibition `"V_m_a_x"` decreases and Km increases
B:-In mixed inhibition `"V_m_a_x"` decreases and Km increases, in non-competitive inhibition `"V_m_a_x"` decreases and Km unchanged C:-In both mixed inhibition and non-competitive inhibition `"V_m_a_x"` and Km decreases
D:-In mixed inhibition `"V_m_a_x"` decreases and Km decreases, in non-competitive inhibition `"V_m_a_x"` decreases and Km increases Ans: B
68:-Which of the following RNA molecule is NOT a ribozyme?
A:-28S rRNA B:-5S rRNA
C:-RNA part of RNase P D:-Hammer head RNA
Ans: B
69:-Carbonic anhydrase enzyme catalyse the production of carbonic acid from water and `"CO_2"` . Which of the following is correct related to this enzyme?
A:-Carbonic anhydrase decreases the `"pK_a"` value of water
B:-Carbonic anhydrase increases the `"pK_a"` value of water
C:-`"K^+"` is the cofactor of carbonic anhydrase
D:-`"Ca^2^+"` is the cofactor of carbonic anhydrase
Ans: A
70:-Which of the following is the ratio of phospholipid : sphingomyelin : cholesterol in a normal eukaryotic cell plasma membrane? A:-1:1:1 B:-1.5:0.5:1
C:-0.5:1.5:1 D:-1:0.5:1.5
Ans: B
71:-The absorption of ultraviolet (UV) light (the absorbance at 280 nm) is often used as a measure of protein concentration. The R-groups of which amino acids contribute most to absorption of 280 nm light?
A:-Ser, Thr, Cys B:-Lys, Arg, His C:-Trp, Tyr, Phe D:-Ser, Ala, Glu
Ans: C
72:-In a eukaryotic cell plasma membrane, different phospholipid preferentially localized to either cytosolic side or exoplasmic side. Which of the following is the correct orientation of phospholipids like phosphatidyl choline and phosphatidyl inositol in cytosolic and exoplasmic side?
A:-Both are cytosolic
B:-Both are exoplasmic
C:-Phosphatidyl choline is localized to cytosolic and phosphatidyl inositol is localized to exoplasmic
D:-Phosphatidyl inositol is localized to cytosolic and phosphatidyl choline is localized to exoplasmic
Ans: D
73:-Which of the following cyclin is responsible to activate CDK4 and CDK6 to pass the cell cycle from G1 phase?
A:-Cyclin A B:-Cyclin B C:-Cyclin D D:-Cyclin E
Ans: C
74:-Which of the following transposons is an example of non autonomous transposon?
A:-Ac elements in maize B:-Ds elements in maize C:-P elements in drosophila D:-IS elements in bacteria
Ans: B
75:-`"Na^+/K^+"` pump utilize ATP hydrolysis to pump `3"Na^+"` to the extracellular side and 2 `"K^+"` to the intracellular side and generate an electric potential to the cell. This pump belong to
A:-F type pump B:-V type pump C:-P type pump D:-ABC type pump
Ans: C
76:-Which monomeric G proteins are involved in the formation of filopodium, lamellipodium and stress fibers?
A:-Filopodium - cdc42, Lamellipodium - Rac, Stress fibers - Rho
B:-Filopodium - Rac, Lamellipodium - cdc42, Stress fibers - Rho
C:-Filopodium - Rho, Lamellipodium - Rac, Stress fibers - cdc42
D:-None of the above
Ans: A
77:-Apoptosis (programmed cell death) executed by the action of caspase enzyme in intrinsic and extrinsic pathway of apoptosis. Which of the following caspase is involved in intrinsic pathway of apoptosis?
A:-Proteolytic cleavage of procaspase to caspase 9
B:-Dimerisation of procaspase to caspase 9
C:-Proteolytic cleavage of procaspase to caspase 8
D:-Dimerisation of procaspase to caspase 8
Ans: B
78:-Which of the following ligand and receptor correctly matches?
A. Epinephrine - (i) HER (RTK)
B. EGF - (ii) Frizzled
C. Bacteria - (iii) GPCR
D. Wnt - (iv) TLR
A:-A - iii, B - i, C - iv, D - ii B:-A - ii, B - iii, C - iv, D - i
C:-A - iii, B - iv, C - i, D - ii D:-A - iv, B - i, C - iii, D - ii
Ans: A
79:-Replication in both prokaryotes and eukaryotes occur only in 5' → 3' direction. Which of the following reason for that?
A:-Primer addition is not possible B:-Okazaki fragments not possible
C:-Leading strand synthesis is not possible D:-Proofreading is not possible
Ans: D
80:-Which of the following protein are involved in the development of dorsal side of the embryo?
A:-Decapentaplegic and tolloid B:-Dorsal and fgf 8
C:-Bicoid and hunchback D:-Nanos and Caudal
Ans: A
81:-Which of the following photosystem locate in the appressed (stalked) portion of thylakoid membrane?
A:-Photosystem I B:-Photosystem II C:-Cyt bf complex D:-Light harvesting complex I
Ans: B
82:-Which of the following RNA polymerase is involved in the synthesis of RNA part of `"U_6"` spliceosome?
A:-RNA polymerase I B:-RNA polymerase II C:-RNA polymerase III D:-RNA polymerase IV
Ans: C
83:-Plant secondary metabolite flavonoids are derived from the amino acid phenylalanine. Which of the following is the precursor of flavonoids synthesizing pathway?
A:-Chorismate B:-Enol pyruvate shikimate pathway C:-Prephenate D:-Chalcone
Ans: D
84:-Which of the following amino acid use a single codon for the translation of proteins in humans?
A:-Alanine B:-Histidine C:-Valine D:-Tryptophan
Ans: D
85. Which of the following orbital is associated with n = 5, l = 3 ?
(a) 5p (b) 5d (c) 5f (d) 5s
Ans: C
86. The effective nuclear charge realized by 1s electron of helium atom is
(a) 0.70 (b) 0.30 (c) 2.00 (d) 1.70
Ans: D
87. The total number of orbitals in/associated with principal quantum number n = 4 are
(a) 12 (b) 14 (c) 16 (d) 8
Ans: C
88. Four elements A, B, C and D have the following atomic numbers : A = 3, B = 8, C = 10 and D = 6 Which of the above element would have highest ionization enthalpy ?
(a) A (b) B (c) C (d) D
Ans: C
89. Which of the following factors affect the ionization potential of an element ?
(a) Atomic size (b) Nuclear charge (c) Shielding effect (d) All of these
Ans: D
90. Gama rays are :
(a) High energy proton (b) High energy electron
(c) High energy electromagnetic waves (d) Low energy electromagnetic waves
Ans: C
91. What is the purpose of the salt bridge in a voltaic cell ?
(a) It allows electron flow. (b) It prevents electron flow. (c) It allows ion migration. (d) It prevents ion migration.
Ans: C
92. Arrange the following elements in increasing order of their electronegativity :
(a) Li < Na < K < Cs (b) Cs < K < Na < Li
(c) Na < K < Li < Cs (d) K < Li < Na < Cs
Ans: B
93. Which of the following oxides is amphoteric ?
(a) MgO (b) CaO (c) BeO (d) BaO
Ans: C
94. Indicate the element which does not form hydride by direct heating with dihydrogen ?
(a) Ba (b) Be (c) Sr (d) Mg
Ans: B
95. Trans uranium elements belong to which block ?
(a) d (b) f (c) p (d) s
Ans: B
96. Which of the following is semi-metal ?
(a) Ga (b) In (c) B (d) Th
Ans: C
97. Iodine does not react with
(a) Phosphorous (b) Sulphur (c) Fluorine (d) Nitric Acid
Ans: B
98. Identify the ore of zinc which contains carbonate.
(a) Malachite (b) Cerussite (c) Zincite (d) Calamine
Ans: D
99. A blast furnace may be used to extract iron from haematite ore. The principal reducing agent in the blast furnace is
(a) O2 (b) CO (c) NO (d) SO2
Ans: B
100. If 75% of any given amount of a radioactive substance disintegrates in 1 hour, then its half life period will be
(a) 90 minutes (b) 75 minutes (c) 30 minutes (d) 45 minutes
Ans: C