E-PolyLearning

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

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

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

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

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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