Nitrogen Metabolism – Section 1

6. Which of the following amino acid do not fall under the category of an essential amino acid?

A. Histidine
B. Leucine
C. Glycine
D. Methionine

Correct Answer: C. Glycine

8. The inputs to one cycle of the urea cycle are

A. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP
B. 1 molecule of urea, 1 molecule of ammonia, 3 molecules of ATP and 1 molecule of fumaric acid
C. 1 molecule of fumaric acid, 1 molecule of urea, 3 molecules of AMP
D. None of the above

Correct Answer: A. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP

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