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Kaplan Qbank USMLE



Author2 Posts
  #1

you have mice that are fed for a few weeks of food lacking tryptophan; however it contains other a.a's. these mice incorporate less glycine into their tissue proteins than those mice that got full diets of all the a.a. The difference in incorporating glycine suggests which?
a) absence of an essentia lamino acid impair ability of tissues to synthesize protein
b) trryptophan is major precursor of glycine

i think a.

  #2

yes from given options, a..







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