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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