题目内容

三羧酸循环的生理意义为

A. 合成胆汁酸
B. 提供能量
C. 提供NADPH
D. 参与酮体代谢
E. 参与蛋白代谢

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1分子乙酰CoA经三羧酸循环氧化后的产物是

A. 草酰乙酸
B. 草酰乙酸和CO2
CO2和H2O
D. 草酰乙酸、CO2和H2O
E. 2分子CO2和4分子还原当量

下列关于三羧酸循环的叙述错误的是

A. 是三大营养物质的最终代谢通路
B. 乙酰CoA进入三羧酸循环后只能被氧化
C. 生糖氨基酸可通过三羧酸循环转变成葡萄糖
D. 乙酰CoA经三羧酸循环氧化时,可提供4分子还原当量
E. 三羧酸循环可为其他代谢物合成提供小分子原料

TAC中产生FADH2的步骤是

A. 异柠檬酸→α-酮戊二酸
B. 草酰乙酸→柠檬酸
C. 延胡索酸→苹果酸
D. 琥珀酸→延胡索酸
E. 苹果酸→草酰乙酸

Complete the sentences with words from the boxes. Then discuss with a partner which fact(s) you think are true. Why (not)? caravan smell petrol puff shorten1 One in five people in the UK go on holiday in a ____________ every year.2 China is the second biggest consumer of ____________ in the world.3 ____________ is the sense most connected with memory.4 Ninety percent of smokers who quit are likely to ____________ on a cigarette again in their lifetime.5 Being overweight at 40 can ____________ your life by seven years.

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