Amino Acid Metabolism & Urea Cycle Flashcards
1
Q
Tyrosine is metabolized to acetoacetyl CoA and fumarate and thus can be described as a:
A. glycogenic amino acid
B. ketogenic amino acid
C. ketogenic and glycogenic amino acid
A
C. ketogenic and glycogenic amino acid
2
Q
Of the 20, how many amino acids can be used as building blocks for GLUCOSE synthesis: A. 2 B. 5 C. 13 D. 7 E. 18
A
E. 18
3
Q
Which of the following contributes to loss of brain function in hepatic encephalopathy? A. alpha-ketoglutarate B. valine C. pyridoxal 5' phosphate D. ammonia E. methionine
A
D. ammonia
4
Q
Cystathionine beta-synthase deficiency affects the metabolism of which the following amino acids? A. isoleucine B. valine C. phenylalanine D. tyrosine E. methionine
A
E. methionine
5
Q
Graves disease is an overproduction of which of the following? A. melanin B. nitric oxide C. thyroid hormones D. dopamine E. glutathione
A
C. thyroid hormones
6
Q
Which of the following nutrients may help lower homocysteine levels? A. pyridoxal 5' phosphate B. folic acid C. vitamin B12 D. all of the above
A
D. all of the above
7
Q
Which of the following amino acids can not be effectively degraded in Maple Syrup Urine disease? A. Ile B. Leu C. Val D. All of the above E. None of the above
A
D. All of the above
8
Q
Which of the following amino acids should not be in the diet of someone with PKU? A. aspartame B. red meat C. phenylalanine D. All of the above E. None of the above
A
D. All of the above
