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Kaplan Qbank USMLE



Author6 Posts
  #1

fetal and maternal erythrocytes have the same concentration of 2,3-bisphosphosglycerate
however compared with maternal hemoglobin {hbA}
fetal hemoglobin HbF has a higher oxygen affinity
which facilates transplacental diffusion of oxygen
the presence of which of the following polypeptide chains in HbF accounts for this finding ?

a.-alpha chains alone
b.-beta chanis alone
c.-gamma chains
d.-Both alpha and Beta chains

  #2

Found it HbF has 2 apha chains and 2 gamma chains
HbA has 2 alpha chains and 2 beta chains

nice and easy

Choice C

  #3

agreed


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  #4

surely c

  #5

cedrick are the questions posted by u from nbme?

  #6

c fr sure


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