看板Biology
标 题请问生化题目
发信站不良牛牧场 (Fri Feb 24 18:51:07 2006)
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A new compound is isolated from mitochondria and a claim is made that
it represents a previously unrecognized carrier in the electron transfer
chain, and it is given the name coenzyme Z. Which line of evidence do you
feel is the least conclusive in assinging this compound a position in the
electron transfer chain!?
A. When added to a mitochondrial suspension, coenzyme Z very rapidly and
specifically is taken up by the mitochondria.
B. Removal of coenzyme Z from the mitochondria results in a decreased rate
of oxygen consumption.
C. Alternate oxidation and reduction of the mitochondrion-bound coenzyme Z
can be readily demonstrated
D. The rate of oxidation and reduction of mitochondrion-bound coenzyme is
of the same order of magnitude as the overall rte of electron transfer in
mitochondria as measured by oxygen consumption.
为什麽答案是A呢!!??
我怎麽觉得D比较接近
请强者帮我解答^^
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