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Questions and Answers
Why is the affinity of fetal hemoglobin for oxygen higher than that of adult hemoglobin?
Why is the affinity of fetal hemoglobin for oxygen higher than that of adult hemoglobin?
- The Bohr effect is enhanced in the fetus
- The tense form of hemoglobin is more prevalent in the circulation of the fetus
- There is less 2,3-BPG in the fetal circulation as compared to maternal circulation (correct)
- Fetal hemoglobin cannot bind 2,3-BPG effectively
Which amino acid is rich in protein and provides the greatest buffering capacity at physiologic pH?
Which amino acid is rich in protein and provides the greatest buffering capacity at physiologic pH?
- Histidine (correct)
- Serine
- Arginine
- Lysine
What could explain a farmer's bluish skin coloring and methemoglobin levels of 20%?
What could explain a farmer's bluish skin coloring and methemoglobin levels of 20%?
- Carbon monoxide poisoning
- Nitrates in well water (correct)
- Cyanide poisoning
- Lack of vitamin E in the diet
Which amino acid cannot be found in proteins?
Which amino acid cannot be found in proteins?
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What characteristic of glycine accounts for its use as the initial amino acid in the collagen repeat Gly-X-Y?
What characteristic of glycine accounts for its use as the initial amino acid in the collagen repeat Gly-X-Y?
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What is the rate-limiting enzyme in catecholamines biosynthesis?
What is the rate-limiting enzyme in catecholamines biosynthesis?
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Which amino acid's side chain permits it to gain or lose a proton, thus contributing to its buffering capacity at physiologic pH?
Which amino acid's side chain permits it to gain or lose a proton, thus contributing to its buffering capacity at physiologic pH?
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What does enzymatic reaction velocity depend on?
What does enzymatic reaction velocity depend on?
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