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Essential Biochemistry - Protein Metabolism (Section 12)

1
In the metabolism of phenylalanine and tyrosine, what enzyme is responsible for catalyzing the reaction of phenylpyruvate to form phenylketones?
Answer
(C)
Phenylpyruvate reductase
2
Which of the following is NOT a function of glutamine?
Answer
(D)
Precursor to urea
3
Where does the urea cycle primarily take place in the cell?
Answer
B
A
4
Which of the following does not take part in the human urea cycle?
Answer
(D)
Urease
5
What is the main function of the enzyme pepsin?
Answer
(C)
Break down proteins
6
Which substance activates pepsinogen?
Answer
(B)
Pepsin
7
Where does the digestion of proteins begin?
Answer
(B)
Stomach
8
What is the role of glutamine in the liver?
Answer
(A)
Ammonia Detoxification
9
Which enzyme directly activates trypsinogen?
Answer
(B)
Enteropeptidase
10
What is the primary role of the enzyme, tryptophan 2,3-dioxygenase?
Answer
(B)
Catabolism of tryptophan to kynurenine