Which one of the following is used as a vector for cloning genes into higher organisms?
1. Baculovirus
2. Salmonella typhimurium
3. Rhizopus nigricans
4. Retrovirus
The one aspect which is not a salient feature of genetic code, is its being:
1. degenerate
2. ambiguous
3. universal
4. specific
Which one of the following is an example of ex-situ conservation?
1. Wildlife sanctuary
2. Seed bank
3. Sacred groves
4. National park
Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?
| 1. | 5'-CGTTCG-3' | 2. | 5'-GATATG-3' |
| 3'-ATGGTA-5' | 3'-CTACTA-5' | ||
| 3. | 5'-GAATTC-3' | 4. | 5'-CACGTA-3' |
| 3'-CTTAAG-5' | 3'-CTCAGT-5' |
Which one of the following statements is correct with respect to AIDS?
| 1. | HIV can be transmitted through eating food together with an infected person. |
| 2. | Drug addicts are the least susceptible to HIV infection. |
| 3. | AIDS patients are being fully cured cent per cent with proper care and nutrition. |
| 4. | The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers. |
Phototropic curvature is the result of uneven distribution of:
1. gibberellin
2. phytochrome
3. cytokinins
4. auxin
The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do (a), (b) and (c) represent, respectively?
|
(a) |
(b) |
(c) |
|
|
1. |
Regulator |
Conformer |
Partial regulator |
|
2. |
Conformer |
Regulator |
Partial regulator |
|
3. |
Regulator |
Partial regulator |
Conformer |
|
4. |
Partial regulator |
Regulator |
Conformer |
Male and female gametophytes are independent and free-living in:
1. Mustard
2. Castor
3. Pinus
4. Sphagnum
The technical term used for the androecium in a flower of China rose (Hibiscus rosa-sinensis) is:
| 1. | monadelphous | 2. | diadelphous |
| 3. | polyandrous | 4. | polyadelphous |
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