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:  Plant Breeding for Quality (OLD NCERT) |
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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:  Plant Breeding for Quality (OLD NCERT) |
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The scientific process by which crop plants are enriched with certain desirable nutrients is called:

1. crop protection

2. breeding

3. bio-fortification

4. bio-remediation.

Subtopic:  Plant Breeding for Quality (OLD NCERT) |
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The term ‘totipotency’ refers to the capacity of a:

1. cell to generate the whole plant

2. bud to generate the 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 Breeding for Quality (OLD NCERT) |
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An explant is a :

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 Breeding for Quality (OLD NCERT) |
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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 for Quality (OLD NCERT) |
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Lysine and tryptophan are:

1. proteins

2. non-essential amino acids

3. essential amino acids

4. aromatic amino acids.

Subtopic:  Single Cell Protein (OLD 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 a smaller scale

Subtopic:  Plant Breeding for Quality (OLD NCERT) |
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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 Breeding & Its Steps (OLD NCERT) | Plant Breeding for Quality (OLD NCERT) |
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