BOTANY- PAGE 10
1 The precursor of ethylene biosynthesis in plants is
1) Aminoethoxyvinylglycine
2) Amino Oxyacetic acid
3) 1Aminocyclopropane1carboxylic acid
4) Hydrogen cyanide
Answer: 3
2 In an experiment the excised cotyledons of Raphanus sativus were treated with a chemical solution 'X'. When incubated either in dark or light the size of cotyledons doubled as compared to control where no chemical 'X' was added. What could be this chemical 'X'?
1) IAA
2) GA3
3) IBA
4) Kinetin
Answer: 4
3 The production of hydrolytic enzymes and alpha amylase by aleurone layer to digest starch present in
endosperm of barley seeds is dependent upon
1) Gibberellin produced by scutellum
2) Auxin produced by scutellum
3) Both gibberellin and auxin produced by scuttellum
4) Indole compounds produced by scutellum
Answer: 1
4 Why seeds in a ripe tomato do not germinate even though the temperature , moisture and oxygen conditions are favourable?
1) Due to presence of acids
2) Due to negative osmotic potential of juice
3) Due to presence of lycopene
4) All of these
Answer: 2
5 In a rice field a disease called "Bakane Disease" suddenly appeared and all the plants grew longer than
normal. Investigations revealed that the causal organism was Fusarium. What could be the reason for
abnormal elongation of rice plants?
1) Xylem vessels were clogged
2) Fungus produced gibberellins
3) Fungus produced fusaric acid
4) Fungus produced auxin
Answer: 2
6 One of the possible reasons of seed dormancy in plants can be due to
1) Abscisic acid
2) Thiourea
3) Cyanide
4) Azide
Answer: 1
7 Which of the following physiological functions adversely affect the photosynthetic efficiency of plants?
1) Phosphorylation
2) Glycolysis
3) Photorespiration
4) All of these
Answer: 3
8 Number of quantasomes capable of electron transport and photophosphorylation is
1) Two
2) 3 8
3) 4 10
4) 12 15
Answer: 2
9 Select the correct pair
1) Middle- lamella = cellulose
2) Primary cell wall = cellulose and hemicellulose
3) Secondary cell wall = Lignin and Cutin
4) Plasma membrane = Lipids only
Answer: 2
10 In Haplopappus gracilis root hair cells diploid chromosomes number is
1) 2n = 8
2) 2n = 4
3) 2n = 16
4) 2n = 32
Answer: 2
11 Unidirectional export of which type of RNA takes place unidirectional through nuclear pores
1) tRNAs
2) rRNAs
3) tRNAs, mRNAs
4) tRNA and processed mRNA
Answer: 4
12 In mitosis chrmosomes split at centromeres takes place in
1) Prophase
2) Metaphase
3) Anaphase
4) Telophase
Answer: 3
13 Common wheat is a hexaploid (2n = 42) its base number is
1) 21
2) 42
3) 7
4) 14
Answer: 3
14 Eukaryotic polymerases are of five types. They are identified from
1) Yeast cells and rat liver
2) Human cell cultures
3) Tumour cells
4) Yeast cells, rat liver, human cell cultures and tumour cells
Answer: 4
15 Transposons are of how many types on the basis of their structures and mechanism of transposition ?
1) 4 and 2
2) 2 and 4
3) 3 and 4
4) one and 4
Answer: 1
16 The movement of DNA among mitochondria, chloroplasts and nucleus takes place in yeast and sea urchin.
Such DNA is called
1) Pseudogenes
2) ZDNA
3) Promiscuous DNA
4) Split genes
Answer: 3
17 The word gene was proposed for the first time by
1) Bateson
2) Johansen
3) Mendel
4) Lederberg
Answer: 2
18 During transcription, only one strand of DNA duplex is copied. This strand is called
1) Sense strand
2) Antisense strand
3) Complimentary strand
4) Template strand
Answer: 2
19 Chromosomes constitution of Down's syndrome is
1) 13, 13, 13
2) 18, 18, 18
3) 21, 21, 21
4) 45, 47, 48
Answer: 3
20 Heterosis is being exploited comercially in
1) crop plants
2) ornamental plants
3) fruit crops
4) In crop plants, ornamental plants and fruit crops
Answer: 4
21 Cytoplasmic male sterility can be stopped by
1) Restorer genes
2) Cyptoplasm
3) Nucleus
4) Mitochondrial genes
Answer: 1
22 Male sterile plants will be sterile when cytoplasm is sterile and genotype will be
1) RR
2) Rr
3) rr
4) RR, Rr or rr
Answer: 3
23 In transformation, transforming principle is DNA was proved by
1) Avery, MacLeod and McCarty
2) Griffith
3) Hershey and Chase
4) Watson and Crick
Answer: 1
24 Double stranded RNA is found in
1) R17
2) MS4
3) MS2
4) Wound Tumor Virus
Answer: 4
25 Select the correct pair
1) Z form of DNA- 12 base pairs per turn
2) C form of DNA - 10 base pairs per turn
3) B form of DNA- 9.33 base pairs per turn
4) A form of DNA- 12 base pairs per turn
Answer: 1
1) Aminoethoxyvinylglycine
2) Amino Oxyacetic acid
3) 1Aminocyclopropane1carboxylic acid
4) Hydrogen cyanide
Answer: 3
2 In an experiment the excised cotyledons of Raphanus sativus were treated with a chemical solution 'X'. When incubated either in dark or light the size of cotyledons doubled as compared to control where no chemical 'X' was added. What could be this chemical 'X'?
1) IAA
2) GA3
3) IBA
4) Kinetin
Answer: 4
3 The production of hydrolytic enzymes and alpha amylase by aleurone layer to digest starch present in
endosperm of barley seeds is dependent upon
1) Gibberellin produced by scutellum
2) Auxin produced by scutellum
3) Both gibberellin and auxin produced by scuttellum
4) Indole compounds produced by scutellum
Answer: 1
4 Why seeds in a ripe tomato do not germinate even though the temperature , moisture and oxygen conditions are favourable?
1) Due to presence of acids
2) Due to negative osmotic potential of juice
3) Due to presence of lycopene
4) All of these
Answer: 2
5 In a rice field a disease called "Bakane Disease" suddenly appeared and all the plants grew longer than
normal. Investigations revealed that the causal organism was Fusarium. What could be the reason for
abnormal elongation of rice plants?
1) Xylem vessels were clogged
2) Fungus produced gibberellins
3) Fungus produced fusaric acid
4) Fungus produced auxin
Answer: 2
6 One of the possible reasons of seed dormancy in plants can be due to
1) Abscisic acid
2) Thiourea
3) Cyanide
4) Azide
Answer: 1
7 Which of the following physiological functions adversely affect the photosynthetic efficiency of plants?
1) Phosphorylation
2) Glycolysis
3) Photorespiration
4) All of these
Answer: 3
8 Number of quantasomes capable of electron transport and photophosphorylation is
1) Two
2) 3 8
3) 4 10
4) 12 15
Answer: 2
9 Select the correct pair
1) Middle- lamella = cellulose
2) Primary cell wall = cellulose and hemicellulose
3) Secondary cell wall = Lignin and Cutin
4) Plasma membrane = Lipids only
Answer: 2
10 In Haplopappus gracilis root hair cells diploid chromosomes number is
1) 2n = 8
2) 2n = 4
3) 2n = 16
4) 2n = 32
Answer: 2
11 Unidirectional export of which type of RNA takes place unidirectional through nuclear pores
1) tRNAs
2) rRNAs
3) tRNAs, mRNAs
4) tRNA and processed mRNA
Answer: 4
12 In mitosis chrmosomes split at centromeres takes place in
1) Prophase
2) Metaphase
3) Anaphase
4) Telophase
Answer: 3
13 Common wheat is a hexaploid (2n = 42) its base number is
1) 21
2) 42
3) 7
4) 14
Answer: 3
14 Eukaryotic polymerases are of five types. They are identified from
1) Yeast cells and rat liver
2) Human cell cultures
3) Tumour cells
4) Yeast cells, rat liver, human cell cultures and tumour cells
Answer: 4
15 Transposons are of how many types on the basis of their structures and mechanism of transposition ?
1) 4 and 2
2) 2 and 4
3) 3 and 4
4) one and 4
Answer: 1
16 The movement of DNA among mitochondria, chloroplasts and nucleus takes place in yeast and sea urchin.
Such DNA is called
1) Pseudogenes
2) ZDNA
3) Promiscuous DNA
4) Split genes
Answer: 3
17 The word gene was proposed for the first time by
1) Bateson
2) Johansen
3) Mendel
4) Lederberg
Answer: 2
18 During transcription, only one strand of DNA duplex is copied. This strand is called
1) Sense strand
2) Antisense strand
3) Complimentary strand
4) Template strand
Answer: 2
19 Chromosomes constitution of Down's syndrome is
1) 13, 13, 13
2) 18, 18, 18
3) 21, 21, 21
4) 45, 47, 48
Answer: 3
20 Heterosis is being exploited comercially in
1) crop plants
2) ornamental plants
3) fruit crops
4) In crop plants, ornamental plants and fruit crops
Answer: 4
21 Cytoplasmic male sterility can be stopped by
1) Restorer genes
2) Cyptoplasm
3) Nucleus
4) Mitochondrial genes
Answer: 1
22 Male sterile plants will be sterile when cytoplasm is sterile and genotype will be
1) RR
2) Rr
3) rr
4) RR, Rr or rr
Answer: 3
23 In transformation, transforming principle is DNA was proved by
1) Avery, MacLeod and McCarty
2) Griffith
3) Hershey and Chase
4) Watson and Crick
Answer: 1
24 Double stranded RNA is found in
1) R17
2) MS4
3) MS2
4) Wound Tumor Virus
Answer: 4
25 Select the correct pair
1) Z form of DNA- 12 base pairs per turn
2) C form of DNA - 10 base pairs per turn
3) B form of DNA- 9.33 base pairs per turn
4) A form of DNA- 12 base pairs per turn
Answer: 1
26:-Phyllotaxy refers to the arrangement of
A:-leaves on a branch
B:-flowers on a branch
C:-veins in a leaf
D:-axillary buds in a plant
Ans: A
27:-Which of the following acts as a bio-indicator of air pollution?
A:-alga
B:-fern
C:-lichen
D:-pinus
Ans: C
28:-Development of fruit without fertilisation is called
A:-parthenogenesis
B:-autogamy
C:-pseudogamy
D:-parthenocarpy
Ans: D
A:-leaves on a branch
B:-flowers on a branch
C:-veins in a leaf
D:-axillary buds in a plant
Ans: A
27:-Which of the following acts as a bio-indicator of air pollution?
A:-alga
B:-fern
C:-lichen
D:-pinus
Ans: C
28:-Development of fruit without fertilisation is called
A:-parthenogenesis
B:-autogamy
C:-pseudogamy
D:-parthenocarpy
Ans: D