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Kaplan Qbank USMLE



Author4 Posts
  #1

1. A 19 month old girl ingests her mother;s iron supplementation,at autopsy,hepatic tissue show lysosomal degradation,what is teh mechanism?

A.activation of glutathione peroxidase
B.inhibition of glutathione tranferase
C.peroxidation of DNA
D.peroxidation of membrane lipids.


2.which chain in the fetal Hb is reposible for higher affinity for Oxygen?

A.alpha chains
B.beta chains
C.gamma chains
D.alpha & beta

  #2

D.
C.

  #3

can u explain the answer of first question

  #4

metabolism of metals yields free radicles that cause lipid peroxidation

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