The two polypeptide chains of insulin protein are linked together by:
| 1. | disulfide bonds | 2. | hydrogen bonds |
| 3. | covalent bonds | 4. | ionic bonds |
The viruses generally used for gene therapy are:
| 1. | ds DNA virus | 2. | ss DNA virus |
| 3. | Reovirus | 4. | Reterovirus |
Bt cotton is not:
| 1. | A GM plant |
| 2. | Insect resistant |
| 3. | A bacterial gene expressing system |
| 4. | Resistant to all pesticides |
| 1. | A part of mature insulin molecule |
| 2. | Responsible for formation of disulphide bridges |
| 3. | Removed during maturation of pro-insulin to insulin |
| 4. | Responsible for its biological activity |
A probe which is a molecule used to locate homologous sequences in a mixture of DNA or RNA molecules could be:
| 1. | A ssRNA | 2. | A ssDNA |
| 3. | Either RNA or DNA | 4. | Can be ssDNA but not ssRNA |
A protoxin is:
| 1. | A primitive toxin | 2. | A denatured toxin |
| 3. | Toxin produced by protozoa | 4. | Inactive toxin |
The trigger for activation of toxin of Bacillus thuringiensis is:
| 1. | Acidic pH of stomach |
| 2. | High temperature |
| 3. | Alkaline pH of gut |
| 4. | Mechanical action in the insect gut |
ADA is an enzyme which is deficient in a genetic disorder SCID. What is the full form of ADA?
| 1. | Adenosine deoxyaminase | 2. | Adenosine deaminase |
| 3. | Aspartate deaminase | 4. | Arginine deaminase |
Silencing of a gene could be achieved through the use of:
| 1. | RNAi only | 2. | antisense RNA only |
| 3. | both RNAi and antisense RNA | 4. | none of the above |