1mol葡萄糖在心脏中氧化分解生成多少mol能量

2025-04-08 09:06:39
推荐回答(1个)
回答1:

1mol葡萄糖在心脏中氧化分解生成多少mol能量
在您的课本中,答案可能是36或38.但在最近的教辅中,生物采取以下的计算方法和答案。
30或32:
具体算法:葡萄糖 → CO2 + H2O + ATP
(1)糖酵葡萄糖 → 丙酮酸 + 2NADH + 2ATP;
(2)丙酮酸 → 乙酰CoA,产生1分子NADH;
(3)一分子乙酰CoA经过三羧酸循环,产生3NADH + 1FADH2 + 1ATP/GTP
经过呼吸链:1NADH → 2.5 ATP(旧数据是3ATP);1FADH2 → 1.5ATP(旧数据是2ATP).
所以,总结算:10NADH → 25ATP + 2FADH2 → 3ATP + 4ATP = 32ATP
如果细胞质基质中的NADH(糖酵解步骤产生)经过甘油-3-磷酸穿梭(心脏和肝脏)进入线粒体,就会转变成FADH2,所以就会少产生2ATP(2NADH → 2FADH2),总数就是30ATP.
因此,一个葡萄糖分子完全氧化可以净生成ATP的个数就是30或者32个.

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