In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to:

1. alkaline pH of the insect gut
2. acidic pH of the insect gut
3. action of gut microorganisms
4. presence of conversion factors in the insect gut

Which of the following enhances or induces the fusion of protoplasts?

The first human hormone produced by recombinant DNA technology is:

1. Insulin

2. Estrogen

3. Thyroxin

4. Progesterone

In vitro clonal propagation in plants is characterized by:

1. PCR and RAPD

2. Northern blotting

3. Electrophoresis and HPLC

4. Microscopy

To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?

Which of the following Bt crops is being grown in India by the farmers?

Which part would be most suitable for raising virus-free plants for micro propagation?

1. Bark

2. Vascular tissue

3. Meristem

4. Node

Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin-A deficiency?

A single strand of nucleic acid tagged with a radioactive molecule is called:

The genetically-modified (GM) brinjal in India has been developed for:

1. insect-resistance

2. enhancing self-life

3. enhancing mineral content

4. drought-resistance