biochem lecture 31

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swynocker
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47796
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biochem lecture 31
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2010-11-06 22:11:47
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biochem lecture
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Biochem 31 ex3
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  1. amino acids undergo ______ and oxidative ______. Ammonia is released by this process and is transported in teh form of _____ or _____..
    • Transamination
    • Deamination
    • Glutamine
    • Alanine
  2. Arginine, methionine, and phenylalanine are _____.
    Essential because the body does not have the synthetic capacity to meet the demands.
  3. Methionine produces _____ and phenylalanine is used to produce ____.
    Cysteine, tyrosine
  4. The seven products of amino acid catabolism are
    • Oxaloacetate
    • a-ketoglutarate
    • Pyruvate
    • Fumarate
    • Succinyl CoA
    • Acetyl CoA
    • acetoacetate
  5. Amino acid deamination
    • Transamination
    • Oxidative deanimation
    • Transport of ammonia
  6. The first step of catabolism is ____ and the products are ______ and _____.
    • Transamination
    • a-keto acid and glutamate
  7. All aminotransferases require the coenzyme _______ _____.
    Pyridoxal phosphate
  8. Pyridoxal phosphate is the active form of _______
    vitamin B6
  9. Transamination occurs during _____/_____ of amino acids.
    Degradation and catabolism
  10. Nonessential amino acids are synthesized from available
    root keto acids
  11. A critical enzyme of step 2 in urea cycle is
    Glutamate dehydrogenase
  12. Synthesis of amino acids: the direction of trhe reaction depends on the relative concentrations of ______, _____ _______, and _______ and he ratio of oxidized to reduced coenzymes ___ and ____.
    • Glutamate, a-ketoglutarate, and ammonia
    • NAD+ and NADP+
  13. In the liver oxidative deamination by ____ _______ results in liberation of free amonia.
    Glutamate dehydrogenase
  14. in the liver ammonia is incorporated into glutamate by _____ _______ which also catalyzes the reverse reaction.
    Glutamate dehydrogenase
  15. glutamate is the "____" between amino groups and most aminos acids and free amonia.
    gateway

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