BOTANY- PAGE 11
1 Conjugation in bacteria was discovered in
1) Lederberg and Tatum in 1946
2) Lederberg and Tatum in 1956
3) Lederberg and Tatum in 1960
4) Lederberg and Tatum in 1942
Answer: 1
2 Select the correct statement related to transduction
1) A bacterium carrying a prophage is called lytic.
2) An intergrated phage chromosome is called episome
3) The prophage carrying bacterium is called lysogenic.
4) Bacteriophages are not required for transduction
Answer: 3
3 Bacteria like symbionts of Paramecium are
1) Alpha and gamma particles only
2) Alpha, gamma and lambda particles
3) Alpha, gamma, lambda and sigma particles
4) Alpha, gamma, lambda, sigma and omega particles
Answer: 4
4 "Killer" strains of Ustilago maydis contain
1) Single stranded RNA in their cyptoplasm
2) Double stranded RNA in their cytoplasm
3) Double stranded DNA in their cytoplasm
4) Single stranded DNA in their cytoplasm
Answer: 2
5 Select the correct statement for mtDNA
1) mtDNA codes for 23 types of rRNA.
2) mtDNA codes for 1326 types of proteins molecules
3) mtDNA codes for 23 types of rRNA and 1326 types of proteins
4) mtDNA codes for rRNA and mRNA
Answer: 3
6 Chloroplasts contain
1) tRNA only
2) Ribosomes only
3) tRNA and ribosomes both only
4) tRNA, ribosomes and ringshaped DNA
Answer: 4
7 Plasmagenes are located in
1) Nucleus
2) Nucleolus
3) Cytoplasm
4) Mitochondria and Plastids
Answer: 4
8 CpDNA of Chlamydomonas has genes for
1) Streptomycin resistance
2) Erythromycin resistance
3) Both Streptomycin resistance and Erythromycin resistance
4) Penicillin resistance
Answer: 3
9 Transductants having integrated phage chromosomes are called
1) Primary transductants
2) Exogenate
3) Endogenate
4) Secondary transductants
Answer: 1
10 For mtDNA and cpDNA the recently proprosed model for replication is
1) RDR (Recombinationdependent replication)
2) Replication fork model
3) Rolling circle mechanism
4) Dloops mechanism
Answer: 1
11 Chemical mutagens are classified into two types. Alkylating agents can induce mutations in
1) Replicating DNA
2) Non Replicating DNA
3) Replicating and nonreplicating DNA
4) In RNA
Answer: 3
12 Chiasmata(X) are formed in which stage of meiosis I of Prophase I?
1) Pachytene
2) Diplotene
3) Leptotene
4) Diakinesis
Answer: 2
13 Who discovered gene interaction by studying inheritance of shape of comb of cock?
1) G.J.Mendel
2) Bateson
3) Punnet
4) Bateson and Punnet
Answer: 4
14 Wobble hypothesis for base pairing in codon and anticodon of RNA was given by
1) H.G. Khorana
2) R.T. Okazaki
3) F.H.C. Crick
4) T.H. Morgan
Answer: 3
15 How many functional sites are present on ribosomes?
1) 1 - 2
2) 2 -4
3) 3 -6
4) 4- 8
Answer: 4
16 For the synthesis of three kinds of RNA, how many enzymes are needed in prokaryotes?
1) one
2) Two
3) Three
4) Four
Answer: 1
17 In a dihybrid cross 4 types of phenotypes are obtained in F2 generation. How many types of genotypes will be in the pea plants of Tall and Red phenotypes?
1) 3
2) 5
3) 4
4) 2
Answer: 3
18 Match List I(Gene interaction) and List II(Phenotypic ratio of F2 generation) and find the correct answer with
the help of codes given below List I(Gene Interaction) List II(Phenotypic ratio) A. Complementary genes a.
13:3 B. Supplementart genes b. 9:6:1 C. Polymeric gene action c. 9:7 D. Inhibitory gene action d. 9:3:4
1) A c, B d, C a, D b
2) A c, B d, C b, D a
3) A a, B b, C c, D d
4) A d, B c, C a, D b
Answer: 2
19 Translation is regulated by
1) Ribosome
2) tRNA & mRNA
3) Aminoacyl transferases and aminoacyl synthetases
4) all of these
Answer: 4
20 Select the correct statement for protein synthesis
1) Transalation is not simultaneous with transcription in eukaryotes.
2) Ribosomes in eukaryotes are attached to ER.
3) Ribosomes dissociate into 30S and 50S sub units in eukaryotes.
4) Both Transalation is not simultaneous with transcription in eukaryotes and Ribosomes in eukaryotes are
attached to ER.
Answer: 4
21 An operon is a group of structural genes whose transcription is regulated by
1) A promoter gene
2) A Regulator gene
3) An operator gene
4) Coordinated action of promoter gene, regulator gene and operator genes
Answer: 4
22 The most common encapsulation gel matrix for development of artificial seed is
1) Agargel
2) Agarose gel
3) Sodium alginate
4) Gelrite
Answer: 3
23 The likely cause of somaclonal variation during callus growth is
1) Loss of celltocell contact
2) Chromosomal aberrations
3) Change in ploidy level
4) All of these
Answer: 4
24 The first androgenic haploid plant in vitro was obtained by
1) P.Maheshwari & S.C. Maheshwari
2) S.G Mukherjee & S.C. Maheshwari
3) S.G. Mukherjee & R.C. Maheshwari
4) S.G. Mukherjee & P. Maheshwari
Answer: 2
25 Which of the following methods is not suitable to obtain somatic hybrids?
1) Electrofusion
2) PEG mediated fusion
3) NaNO3 mediated fusion
4) PVP mediated fusion
Answer: 4
1) Lederberg and Tatum in 1946
2) Lederberg and Tatum in 1956
3) Lederberg and Tatum in 1960
4) Lederberg and Tatum in 1942
Answer: 1
2 Select the correct statement related to transduction
1) A bacterium carrying a prophage is called lytic.
2) An intergrated phage chromosome is called episome
3) The prophage carrying bacterium is called lysogenic.
4) Bacteriophages are not required for transduction
Answer: 3
3 Bacteria like symbionts of Paramecium are
1) Alpha and gamma particles only
2) Alpha, gamma and lambda particles
3) Alpha, gamma, lambda and sigma particles
4) Alpha, gamma, lambda, sigma and omega particles
Answer: 4
4 "Killer" strains of Ustilago maydis contain
1) Single stranded RNA in their cyptoplasm
2) Double stranded RNA in their cytoplasm
3) Double stranded DNA in their cytoplasm
4) Single stranded DNA in their cytoplasm
Answer: 2
5 Select the correct statement for mtDNA
1) mtDNA codes for 23 types of rRNA.
2) mtDNA codes for 1326 types of proteins molecules
3) mtDNA codes for 23 types of rRNA and 1326 types of proteins
4) mtDNA codes for rRNA and mRNA
Answer: 3
6 Chloroplasts contain
1) tRNA only
2) Ribosomes only
3) tRNA and ribosomes both only
4) tRNA, ribosomes and ringshaped DNA
Answer: 4
7 Plasmagenes are located in
1) Nucleus
2) Nucleolus
3) Cytoplasm
4) Mitochondria and Plastids
Answer: 4
8 CpDNA of Chlamydomonas has genes for
1) Streptomycin resistance
2) Erythromycin resistance
3) Both Streptomycin resistance and Erythromycin resistance
4) Penicillin resistance
Answer: 3
9 Transductants having integrated phage chromosomes are called
1) Primary transductants
2) Exogenate
3) Endogenate
4) Secondary transductants
Answer: 1
10 For mtDNA and cpDNA the recently proprosed model for replication is
1) RDR (Recombinationdependent replication)
2) Replication fork model
3) Rolling circle mechanism
4) Dloops mechanism
Answer: 1
11 Chemical mutagens are classified into two types. Alkylating agents can induce mutations in
1) Replicating DNA
2) Non Replicating DNA
3) Replicating and nonreplicating DNA
4) In RNA
Answer: 3
12 Chiasmata(X) are formed in which stage of meiosis I of Prophase I?
1) Pachytene
2) Diplotene
3) Leptotene
4) Diakinesis
Answer: 2
13 Who discovered gene interaction by studying inheritance of shape of comb of cock?
1) G.J.Mendel
2) Bateson
3) Punnet
4) Bateson and Punnet
Answer: 4
14 Wobble hypothesis for base pairing in codon and anticodon of RNA was given by
1) H.G. Khorana
2) R.T. Okazaki
3) F.H.C. Crick
4) T.H. Morgan
Answer: 3
15 How many functional sites are present on ribosomes?
1) 1 - 2
2) 2 -4
3) 3 -6
4) 4- 8
Answer: 4
16 For the synthesis of three kinds of RNA, how many enzymes are needed in prokaryotes?
1) one
2) Two
3) Three
4) Four
Answer: 1
17 In a dihybrid cross 4 types of phenotypes are obtained in F2 generation. How many types of genotypes will be in the pea plants of Tall and Red phenotypes?
1) 3
2) 5
3) 4
4) 2
Answer: 3
18 Match List I(Gene interaction) and List II(Phenotypic ratio of F2 generation) and find the correct answer with
the help of codes given below List I(Gene Interaction) List II(Phenotypic ratio) A. Complementary genes a.
13:3 B. Supplementart genes b. 9:6:1 C. Polymeric gene action c. 9:7 D. Inhibitory gene action d. 9:3:4
1) A c, B d, C a, D b
2) A c, B d, C b, D a
3) A a, B b, C c, D d
4) A d, B c, C a, D b
Answer: 2
19 Translation is regulated by
1) Ribosome
2) tRNA & mRNA
3) Aminoacyl transferases and aminoacyl synthetases
4) all of these
Answer: 4
20 Select the correct statement for protein synthesis
1) Transalation is not simultaneous with transcription in eukaryotes.
2) Ribosomes in eukaryotes are attached to ER.
3) Ribosomes dissociate into 30S and 50S sub units in eukaryotes.
4) Both Transalation is not simultaneous with transcription in eukaryotes and Ribosomes in eukaryotes are
attached to ER.
Answer: 4
21 An operon is a group of structural genes whose transcription is regulated by
1) A promoter gene
2) A Regulator gene
3) An operator gene
4) Coordinated action of promoter gene, regulator gene and operator genes
Answer: 4
22 The most common encapsulation gel matrix for development of artificial seed is
1) Agargel
2) Agarose gel
3) Sodium alginate
4) Gelrite
Answer: 3
23 The likely cause of somaclonal variation during callus growth is
1) Loss of celltocell contact
2) Chromosomal aberrations
3) Change in ploidy level
4) All of these
Answer: 4
24 The first androgenic haploid plant in vitro was obtained by
1) P.Maheshwari & S.C. Maheshwari
2) S.G Mukherjee & S.C. Maheshwari
3) S.G. Mukherjee & R.C. Maheshwari
4) S.G. Mukherjee & P. Maheshwari
Answer: 2
25 Which of the following methods is not suitable to obtain somatic hybrids?
1) Electrofusion
2) PEG mediated fusion
3) NaNO3 mediated fusion
4) PVP mediated fusion
Answer: 4