• 2022-06-19
    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.
  • B

    内容

    • 0

      In each type of protein, the amino acids are present in a unique order, called the _______________, which is exactly the same from one molecule of that protein to the next.

    • 1

      When a protein is completely hydrolyzed will the further analyse: ( ) A: Only detect amino acids in S conformation B: Often detect other molecules besides amino acids C: Never detect more than 20 standard amino acids D: Never detect fewer than 20 standard amino acids E: Only detect the 20 standard amino acids

    • 2

      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.

    • 3

      Only protein contains amino acids in living organism. A: 正确 B: 错误

    • 4

      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