A: A and E
B: A and C
C: B and C
D: B and D
E: E and D
举一反三
- 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
- The synthesis of fatty acids USES carnitine to transport acetyl-CoA from the mitochondria to the cytoplasm.（）
- Some athletes believe that dietary carnitine supplements will enhance their ability to perform aerobic exercise. Which statement BEST describes the “scientific” basis of this belief? A: Carnitine is required in the transport of medium and long-chain fatty acids into the mitochondrial matrix, and so increasing the amount of carnitine will increase the rate of transport. B: Carnitine activates carnitine-acyl transferase-1 (CAT-I) thereby increasing the rate of transport of fatty acids into the mitochondrial matrix. C: Carnitine levels in the cytoplasm are reduced when large amounts of fatty acyl carnitine are transported into the mitochondrial matrix. D: Carnitine enhances the activation of fatty acids to fatty acyl-CoA, thereby increasing the rate of their transport into the mitochondrial matrix.
- Synthesis of fatty acids from acetyl CoA A: need NADPH B: need NAD+ C: produce malonyl CoA in the first step D: occur in mitochondria E: It's the reverse reactions of fatty acid oxidation
- What would be the consequences of inhibiting the carnitine shuttle which transports fatty acids into the mitochondria? A: accumulation of fat droplets in liver and muscle. B: Increase in blood glucose concentration. C: Increase in fatty acid synthesis in the liver. D: Low levels of long chain free fatty acids in the blood.
内容
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The acetyl CoA required for the synthesis of fatty acids is derive from ( ). A: fat mobilization B: β-oxidation of fatty acids C: degradation of amino acids D: glycolysis E: degradation of glucoses
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Carnitine is: A: an essential cofactor for the citric acid cycle. B: essential for intracellular transport of fatty acids. C: one of the amino acids commonly found in protein. D: present only in carnivorous animals.
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In food, the best ratio of saturated fatty acid, monounsaturated fatty acids, polyunsaturated fatty acid should be ( )
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Jasmonate, derived from the fatty acid 18:3(Δ9,12,15) in membrane lipids, triggers the plant's defenses in response to insect-inflicted damage.
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The inhibition of carnitine acyltransferase I by malonyl-CoA ensures that the oxidation of fatty acids is inhibited whenever the liver is amply supplied with glucose as fuel and is actively making triacylglycerols from excess glucose.