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26. The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.
A. acetate
B. nitrate
C. carbon dioxide
D. all of these
27. Incorporation of atmospheric N2 to NH4+ occurs via the process of
A. assimilatory nitrate reduction
B. transamination
C. deamination
D. nitrogen fixation
28. The role of bacteriophyll in an oxygenic photosynthesis is to
A. reduce ferredoxin directly
B. reduce NADP directly
C. use light energy to energize an electron
D. transfer electrons to an intermediate in the sulfide oxidation pathway
29. TCA cycle functions in
A. catabolic reactions
B. anabolic reactions
C. amphibolic reactions
D. none of these
30. Entner-Doudoroff pathway is found in
A. aerobic prokaryotes
B. anaerobic prokaryotes
C. both (a) and (b)
D. aerobic eukaryotes
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