Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of

1. shorter rice plant

2. better irrigation facilities

3. early yielding rice variety

4. disease-resistant rice variety

Subtopic:  Impact: Green Revolution |
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Which one of the following combinations would a sugarcane farmer look for in the sugarcane crop?

1. Thick stem, long internodes, high sugar content and disease resistance

2. Thick stem, high sugar content and profuse flowering

3. Thick stem, short internodes, high sugar content, disease resistance

4. Thick stem, low sugar content and disease resistance

Subtopic:  Impact: Green Revolution |
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Fungicides and antibiotics are chemicals that

1. enhance yield and disease resistance

2. kill pathogenic fungi and bacteria, respectively

3. kill all pathogenic microbes

4. kill pathogenic bacteria and fungi respectively

Subtopic:  Insect & Pest Resistance |
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Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed

1. recombinant DNA technology

2. transgenic mechanism

3. mutation breeding

4. gene therapy

Subtopic:  Breeding for Disease Resistance |
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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 |
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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 |
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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 |
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The biggest constraint of plant breeding is

1. availability of desirable gene in the crop and its wild relatives

2. infrastructure

3. trained manpower

4. transfer of genes from unrelated sources

Subtopic:  Plant Breeding & Its Steps |
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Lysine and tryptophan are

1. proteins

2. non-essential amino acids

3. essential amino acids

4. aromatic amino 

Subtopic:  Plant Breeding for Quality |
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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 |
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