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Biochemistry Quiz: Amino Acids and Metabolism

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Questions and Answers

Which amino acid can be formed by hydroxylation of phenylalanine?

Tyrosine (correct)
Proline
Alanine
Glycine

Elevated homocysteine levels in the blood can be associated with a deficiency in which vitamin?

Vitamin B12 (correct)
Vitamin D
Vitamin A
Vitamin C

Which enzyme deficiency would have the greatest effect on protein digestion?

Pepsin
Amylase
Trypsin (correct)
Lipase

Which amino acid metabolism reduction can lead to elevated homocysteine levels?

Methionine (A) Signup and view all the answers

Which of the following is NOT part of the catecholamines family derived from tyrosine?

Cortisol (A) Signup and view all the answers

Which citric acid cycle intermediate can participate in Heme Biosynthesis?

Citrate (A) Signup and view all the answers

Which of the following is NOT a function of glycoproteins?

Serving as antibodies (B) Signup and view all the answers

In the urea cycle, which molecule is formed from citrulline when combined with aspartate?

Arginine (A) Signup and view all the answers

Which of the following best represents the function of argininosuccinate synthase in the urea cycle?

Cleavage of argininosuccinate to fumarate and arginine (C) Signup and view all the answers

Which of the following is true about DNA polymerases in DNA synthesis?

They require an RNA primer for DNA synthesis (B) Signup and view all the answers

Which of the following statements about hemoglobin is correct?

It contains iron linked to heme through cysteine (B) Signup and view all the answers

Regarding heme catabolism, which process is involved in breaking down the porphyrin ring?

Oxidative cleavage (A) Signup and view all the answers

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