本题目来源于试卷: Interaction & Interdependence C.2 Cell Respiration，类别为 IB生物学
[单选题]
The Krebs cycle is one of the stages in aerobic cellular ;+7 ) xvomvoxirespik*ip/ak( no fp 0u-0lw w4ve3lration. Which of the following correctly describes tup3fan*vokpli w kle-(w 0/04 he electron carriers?
A. Electron carriers is NAD +, Oxidation or Reduction is Reduced to NADH,Number of times produced in one cycle is 1
B. Electron carriers is FAD +, Oxidation or Reduction is Oxidized to FADH 2,Number of times produced in one cycle is 3
C. Electron carriers is NAD +, Oxidation or Reduction is Oxidized to NADH,Number of times produced in one cycle is 3
D. Electron carriers is FAD +, Oxidation or Reduction is Reduced to FADH 2,Number of times produced in one cycle is 1
参考答案: D
本题详细解析:
In one turn of the Kl;h1i5gw zge(rebs cycle, the production of NADH occurs three times and the production of FADH
2
happens once. Both NAD
+
and FAD
+
have to undergo reduction where they gain electrons and hyd g15hig(zl ew;rogen ions to form NADH and FADH
2
. Oxidation is the process where a substance loses electrons and hydrogen. NAD
+
and FAD
+
are the oxidised forms whereas NADH and FADH
2
are the reduced forms.
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