举一反三
- Which one of the following is a condition decreased the oxidation of acetyl CoA by the citric acid cycle?
- Under normal conditions, the rates of glycolysis and of the citric acid cycle are integrated so that only as much glucose is metabolized to pyruvate as is needed to supply the citric acid cycle with its fuel, the acetyl groups of acetyl-CoA. Pyruvate, lactate, and acetyl-CoA are normally maintained at steady-state concentrations.
- The compound which can not be oxidized into CO2 and H2O in vivo is
- The following metabolites are involved in both the TCA cycle and the glyoxylate cycle except: A: citric acid B: succinate acid C: fumaric acid D: malic acid
- Which of the following is not the outlet of Acetyl CoA? () A: go into the TCA cycle B: use to synthesize fatty acid C: transition to essential amino acid D: produce ketone bodies E: transition to cholesterol
内容
- 0
In fatty acid biosynthesis, which compound transports acetyl groups from the mitochondria into the cytoplasm？（） A: Coenzyme A B: Carnitine C: ACP D: Citric acid
- 1
Besides acetyl CoA, the odd carbon atom fatty acid after β-oxidation produces acetyl CoA.（）
- 2
Which of the following is NOT the outlet of acetyl CoA? ( ) A: go into the TAC cycle B: use to synthesize fat C: transition to ketogenic amino acid D: transition to acetone body E: transition to cholesterol
- 3
*下列 反应的 △ r H m θ (298K) 就是 △ f H m θ (CO 2 , g,298K) 。 (A) CO(g)+1/2O 2 (g)=CO 2 (g) (B) C( 金刚石 )+O 2 (g)=CO 2 (g) (C) C( 石墨 )+O 2 (g)=CO 2 (g) (D) CO 2 (g) = C( 石墨 )+O 2 (g)
- 4
1分子乙酰CoA经TCAC氧化后的产物是（ ）。 A: CO<sub>2</sub>+H<sub>2</sub>O B: 2CO<sub>2</sub>、4分子还原当量和GTP C: 草酰乙酸 D: 草酰乙酸和CO<sub>2</sub> E: 草酰乙酸、CO<sub>2</sub>和H<sub>2</sub>O