Microbial Metabolism – Section 1


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41. The phosphate inhibition in the clavine formation with Claviceps SD58, can be counteracted by the addition of

A. alanine
B. methionine
C. tryptophan
D. lysine

Correct Answer: C. tryptophan
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42. The major route for the incorporation of ammonia (NH4+) into organic compounds is via

A. reduction of pyruvate or alpha-ketoglutarate by enzymes
B. atmospheric nitrogen fixation
C. oxidation of pyruvate
D. all of these

Correct Answer: A. reduction of pyruvate or alpha-ketoglutarate by enzymes
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43. The specific enzyme/(s) of the glyoxylate cycle is/are

A. isocitrate lyase
B. malate synthase
C. both (a) and (b)
D. anaplerotic

Correct Answer: C. both (a) and (b)
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44. If ΔG of a chemical reaction has a negative value, the reaction

A. releases energy
B. requires energy
C. both (a) and (b)
D. none of these

Correct Answer: A. releases energy
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45. The catabolic reaction, pentose-phosphate exists in

A. prokaryotic cells
B. eukaryotic cells
C. prokaryotic and eukaryotic cells both
D. none of these

Correct Answer: C. prokaryotic and eukaryotic cells both
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