Microbial Metabolism – Section 1

46. Entner – Doudoroff pathway is not found in

A. aerobic prokaryotes
B. anaerobic prokaryotes
C. Both (a) and (b)
D. eukaryotes

Correct Answer: D. eukaryotes

47. Aerobic catabolism of glucose yields how much energy (ATP synthesized) relative to glucose fermentation?

A. Slightly less
B. About the same
C. Twice as much
D. More than 10 times as much

Correct Answer: C. Twice as much

48. The bacteriochlorophylls used by the anoxygenic bacteria have absorbance maxima located in the_____portion(s) of the spectrum.

A. green
B. blue
C. ultraviolet
D. infrared

Correct Answer: D. infrared

49. The relationship between an oxidation-reduction potential difference and the standard free energy change is (where n is the number of moles of electron transferred, F= Faraday’s constant and E°= standard oxidation-reduction potential difference)

A. ΔG° = -nFE°
B. ΔG° = nFE°
C. ΔG° = -nFlnE°
D. ΔG° = nFlnE°

Correct Answer: A. ΔG° = -nFE°

50. ATPase

A. synthesizes ATP, coupled to transfer of extracellular protons into the cell
B. extrudes protons from the cell coupled to the hydrolysis of ATP to ADP
C. is the enzyme that incorporates ATP into messenger RNA
D. carries out each of the reactions indicated in (a) and (b)

Correct Answer: D. carries out each of the reactions indicated in (a) and (b)

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