| 16. | When a bacteria swim towards a chemical, it is termed as__________ |
| a. | positive chemotaxis |
| b. | phototaxis |
| c. | negative chemotaxis |
| d. | magnetotaxis |
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Answer: (a).positive chemotaxis
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| 17. | Which type of force drives the flagellar motion? |
| a. | Protonmotive force |
| b. | ATP driven |
| c. | Protonmotive and ATP driven |
| d. | No protonmotive nor ATP driven |
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Answer: (a).Protonmotive force
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| 18. | Peptidoglycan layer is present in large quantity in? |
| a. | Gram-positive bacteria |
| b. | Gram-negative bacteria |
| c. | Fungi |
| d. | Algae |
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Answer: (a).Gram-positive bacteria
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| 19. | Peptidoglycan is made up of __________ |
| a. | N-acetylglucosamine |
| b. | N-acetylmuramic acid |
| c. | N-acetylglucosamine, N-acetylmuramic acid |
| d. | N-acetylglucosamine,N-acetylmuramic acid,amino acids |
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Answer: (d).N-acetylglucosamine,N-acetylmuramic acid,amino acids
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| 20. | Teichoic acid present in Gram-positive bacteria can bind to which ion? |
| a. | Fe ions |
| b. | Phosphorus ions |
| c. | Mg ions |
| d. | Sulphur ions |
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Answer: (c).Mg ions
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