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.

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.

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.

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

Given below are a few statements regarding somatic hybridization. Choose the correct statements:

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.

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.

Lysine and tryptophan are:

1. proteins

2. non-essential amino acids

3. essential amino acids

4. aromatic amino acids.

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

Protoplast is: