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About question 8:
I'm not sure if I'm right. I chose C first, but I now think D is the correct answer. 
My thought:
Read the question again, and focus on the "possible explanation". The question asks about the possible explanation, not the "consequence" of the circumstance.
What causes the high levels of two proteins? The low degradation rate!!
So (D) The mRNA's for both proteins are being degradedat a low rate in that type of cell. | 
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发表于 2006-3-13 10:58:00
