In virus-infected plants, the meristematic tissues in both apical and axillary buds are free of virus because

1. the dividing cells are virus resistant
2. meristems have antiviral compounds
3. the cell division of meristems are faster than the rate of viral multiplication
4. viruses cannot multiply within meristem cell(s)

Subtopic:  Plant Tissue Culture |
 64%
From NCERT
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The term ‘totipotency’ refers to the capacity of a

1. cell to generate whole plant

2. bud to generate whole plant

3. seed to germinate

4. cell to enlarge in size

Subtopic:  Plant Tissue Culture |
 95%
From NCERT
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Given below are a few statements regarding somatic hybridization. Choose the correct statements.

I. Protoplasts of different cells of the same plant are fused.
II. Protoplasts from cells of different species can be fused.
III. Treatment of cells with cellulase and pectinase is mandatory.
IV. The hybrid protoplast contains characters of only one parental protoplast.

1. I and III

2. I and II

3. I and IV

4. II and III

Subtopic:  Plant Tissue Culture |
 67%
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An explant is

1. dead plant

2. part of the plant

3. part of the plant used in tissue culture

4. part of the plant that expresses a specific gene

Subtopic:  Plant Tissue Culture |
 89%
From NCERT
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Micro-propagation is

1. propagation of microbes in vitro

2. propagation of plants in vitro

3. propagation of cells in vitro

4. growing plants on smaller scale

Subtopic:  Plant Tissue Culture |
 69%
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Protoplast is

1. another name for protoplasm

2. an animal cell

3. a plant cell without a cell wall

4. a plant cell

Subtopic:  Plant Tissue Culture |
 82%
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To isolate protoplast, one needs

1. pectinase

2. cellulase

3. both pectinase and cellulase

4. chitinase

Subtopic:  Plant Tissue Culture |
 84%
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Bt cotton is not
1. a GM plant                                           
2. insect resistant
3. a bacterial gene expressing system 
4. resistant to all pesticides

Subtopic:  Bt Crops |
 76%
From NCERT
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C-peptide of human insulin is

1. a part of mature insulin molecule
2. responsible for the formation of disulphide bridges
3. removed during maturation of pro-insulin to insulin
4. responsible for its biological activity

Subtopic:  Med Applications & Humulin |
 95%
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GEAC stands for

1. Genome Engineering Action Committee
2. Ground Environment Action Committee
3. Genetic Engineering Approval Committee
4. Genetic and Environment Approval Committee

Subtopic:  Ethical Issues |
 95%
From NCERT
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