| 161. | Circular 'DNA' present in prokaryotes has molecular weight |
| a. | 2 x 10^7 |
| b. | 2 x 10^8 |
| c. | 2 x 10^10 |
| d. | 2 x 10^9 |
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Answer: (d).2 x 10^9
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| 162. | In human tissues, adherence of bacteria, ultimately causes infection to humans, is mediated by the |
| a. | Cell wall |
| b. | Sugars |
| c. | Capsule |
| d. | Flagella |
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Answer: (c).Capsule
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| 163. | Attachment of 'staphylococci' to 'mucosal' cells is mediated by |
| a. | Sulphuric acid |
| b. | Teichoic acid |
| c. | Polysaccharides |
| d. | Lipopolysaccharides |
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Answer: (b).Teichoic acid
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| 164. | β lactamase is 'enzyme' that is present in |
| a. | Cytoplasm |
| b. | Cytosol |
| c. | Ribosome |
| d. | Periplasma |
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Answer: (d).Periplasma
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