12 Questions
Which amino acid would provide the greatest buffering capacity at physiologic pH?
Histidine
Which amino acid cannot be found in proteins?
β-alanine
What characteristic of glycine makes it suitable as the initial amino acid in the Gly-X-Y repeat of collagen peptides?
Small size and flexibility
Which property of an amino acid would promote its binding in a protein structure?
Basic side groups to promote binding
Why is the affinity of fetal hemoglobin for oxygen higher than that of adult hemoglobin?
There is less 2,3-BPG in the fetal circulation as compared to maternal circulation
What could explain a 35-year-old farmer's methemoglobin levels of 20%?
Nitrates in well water
What is the rate-limiting enzyme in catecholamine biosynthesis?
L-DOPA decarboxylase
On what does enzymatic reaction velocity depend?
Temperature, pH and substrate concentrations
Which statement about the Michaelis constant (Km) is correct?
Km increases in the presence of noncompetitive inhibitors
How do statin drugs inhibit de novo synthesis of cholesterol?
They are a competitive inhibitor of HMG-CoA reductase
Which coenzyme cooperates with dehydrogenases?
All the above can cooperate with dehydrogenases
How can some enzymes be regulated by covalent modification?
Phosphorylation by protein kinases
Test your knowledge of biochemistry with questions on buffering capacity, amino acids, and blood results interpretation. This quiz covers topics such as physiologic pH, protein composition, acidosis, and amino acid side chains.
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