Laboratory tests on the urine of a patient identified the presence ofmethylmalonate (−OOC–CH(CH3)–COO−). Methylmalonate is bestdescribed as which one of the following
A: A strong acid
B: The conjugate base of a weak acid
C: It is 100% dissociated at its pKa.
D: It is 50% dissociated at the pH of the blood.
E: It is a major intracellular buffer.
A: A strong acid
B: The conjugate base of a weak acid
C: It is 100% dissociated at its pKa.
D: It is 50% dissociated at the pH of the blood.
E: It is a major intracellular buffer.
举一反三
- (1) The weak monoprotic acid HA is 2.5% dissociated in 0.10 mol·L-1solution. What is the acidity constant, Ka, of HA?(2)A certain solution of HA has a pH=2.51. What is the concentration of the solution?
- The primary buffer system that controls the pH of the blood is the __________ buffer system. A: carbon dioxide, carbonate B: carbonate, bicarbonate C: carbonic acid, carbon dioxide D: carbonate, carbonic acid E: carbonic acid, bicarbonate
- If your patient has classic carnitine palmitoyltransferase II deficiency,which one of the following laboratory test results would you expect to observe A: Elevated blood acylcarnitine levels B: Elevated ketone bodies in the blood C: Elevated blood glucose levels D: Low CPK blood levels E: Reduced blood fatty acid levels
- Which of the following amino acid can not produce one carbon unit?
- TheKaof the conjugate acid in a buffer solution is 1.0×10-6, it is theoretically inferred that the effective buffer range of the buffer solution is A: 6~8 B: 7~9 C: 5~7 D: 5~6