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Kaplan Qbank USMLE



Author7 Posts
  #1

7- A deficiency of which one of the following enzymes is most likely to be associated with the formation of multiple pale yellow, hard, round stones within the gallbladder?
A. 1- -hydroxylase
B. 7- -hydroxylase
C. 11-hydroxylase
D. 17-hydroxylase
E. 21-hydroxylase

please explain.


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  #2

B. 7 Hydroxylase IN CHOLESTEROL degradation and bile acid synthesis

cholesterol converted to 7-α-hydroxyholesterol>>catalyzed by cholesterol 7 hydroxylase


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  #3

Agree with reet, all the other enzymes are for different things.. Didnt know the answer, but reached to the same conclusion..

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  #4

what is the function of 1-hydroxylase?

  #5

1 hydroxilase converts 25 hydroxicolecalciferol into 1,25 Hydroxicolecalciferol..

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  #6

The answer is B


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  #7

nod

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