本题目来源于试卷: SL/HL Topic C1.2 Cell respiration，类别为 IB生物学
[问答题]
9. There are several dehynbts3 /l.bcip(w d15z 55ebo)yttx8 ddrogenase enzymes in the process of aerobic rzl iu5j . 8/jte.,aehoespiration. i/.e8,u j.5oeh j atzl
They often have the hydrogen acceptor, NAD, as a coenzyme.
Outline the role of the dehydrogenase enzyme and the hydrogen acceptor to the manufacture of energy in aerobic respiration.
参考答案: (Note: Award 1 mark to each of the following points. Max:4)
The dehydrogenase enzyme removes hydrogen from a substrate.
This dehydrogenation occurs in glycolysis (and/or the Krebs cycle).
The hydrogen carrier (NAD) accepts the hydrogen from the respiratory substrates (becoming reduced NAD) The reduced hydrogen carrier (reduced NAD) donates the hydrogen to the electron transport chain. The hydrogen is used to generate a proton gradient.
The hydrogen is split into protons and electrons.
The energy of the gradient drives ATP formation by chemiosmosis.
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