The construction of the first recombinant DNA emerged from the possibility of linking a gene encoding antibiotic resistance with a native plasmid of which of the following organism?
| 1. | Escherichia coli | 2. | Bacillus thuringiensis |
| 3. | Salmonella typhimurium | 4. | Agrobacterium tumefaciens |
Assuming that fur colour of an animal ranges from dark, intermediates shades, to white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with white fur colour. What would be the fur colour of F1 generation?
| 1. | All intermediate colour | 2. | Range of colour shade |
| 3. | All dark colour | 4. | All white colour |
Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls?
| 1. | Hypocapnia | 2. | Bronchitis |
| 3. | Asthma | 4. | Emphysema |
The hormone releasing IUDs among the following are :
| (a) | Multiload 375 | (b) | LNG - 20 |
| (c) | Progestasert | (d) | Lippe's loop |
| (e) | Vaults |
Choose the most appropriate answer from the options given below :
1. (a) and (d) only
2. (c) and (e) only
3. (a) and (b) only
4. (b) and (c) only
| 1. | It contains pigments responsible for trapping light energy. |
| 2. | It houses enzymes required for the synthesis of carbohydrates and proteins. |
| 3. | It serves as the primary site for ribosome assembly. |
| 4. | It provides structural support to the chloroplast. |
In Drosophila, the genes for color of body and color of eyes are situated on _______.
1. both the sex chromosomes
2. autosomes
3. Y-chromosome
4. X-chromosome
Which of the following is correct statement ?
| 1. | Actin and regulatory proteins are located in thin filament. |
| 2. | Z-lines anchor myosin (thick) filament to the ends of the sarcomere. |
| 3. | Sarcoplasmic reticulum stores acetylcholine. |
| 4. | Myosin cross bridges contain calcium binding sites. |
Given below are two statements:
| Statement I: | Membrane-bound organelles of the endomembrane system coordinate cellular functions. |
| Statement II: | Mitochondria and chloroplasts are not considered a part of the endomembrane system. |
In the light of the above statements, choose the most appropriate answer from the options given below :
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
With respect to nucleosome, which of the following statements is incorrect ?
| 1. | Nucleosome contains 120 bp of DNA helix. |
| 2. | Nucleosomes are seen as 'beads' on string' under Electron Microscope. |
| 3. | DNA is wrapped around positively charged histone octamer to form nucleosome. |
| 4. | Nucleosome is the repeating unit of chromatin. |
In a reaction catalyzed by an enzyme, which of the following statements is correct ?
| 1. | Enzymes decrease the activation energy for formation of transition state. |
| 2. | Enzymes make transition form substrate to product more difficult. |
| 3. | Enzymes increase the activation energy for formation of transition state. |
| 4. | Enzyme-substrate complex formed during a reaction lasts for a very long time. |
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