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Kaplan Qbank USMLE



Author8 Posts
  #1

A 75 y.o. woman is seen in the emergency room with fratured arm. Physical examination revealed multiple bruises and perifollicular hemorrhages, peridonitis and painful gums.Her diet consist predominately of weak coffee,bouillion,rolls and plain plasta.Lab results indicated mild microcytic anemia.
Which of the folowing enzymes should be less active than normal in this patient?

a.-Homocysteine Methyltransferase
b.-gamma glutamyl carboxylase
c.-Dihydrofolate reductase
d.-ALA synthase
e.-Prolyl hydroxylase

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Great works are performed not by strength, but by perseverance.

  #2

gotta be e.

vit C is required for collagen synthesis.


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Prepare as if you're the worst, Perform as if you're the best! As you dream, so you manifest. So, DREAM BIG!! When you face hardship, remember, God never gives you more than you can handle. Keep your face to the sunshine and you cannot see the shadows.

  #3

No Clue shaking headshaking headsadsad

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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #4

its scurvy, E

  #5

nodnod E

This patient has many signs of scurvy from vitamin C deficiency. The diet, which contains no fruit or vegetable, provides little vit. C. Prolyl hydroxylase requires vit. C, and in the absence of hydroxylation, the collagen alpha chains do not form stable, mature collagen.

The anemia is due to poor iron absorption in the absence of ascorbate.

___________________
Great works are performed not by strength, but by perseverance.

  #6

nodgot to know all about collagen,given best points in FA.

  #7

wink since u have explained to role of vitamin c.

What is the role of copper in mature collagen production?

what does the lack of Copper led to?


  #8

poor Cu2+ distribution decreases hydroxylysine, this in turn gives cutis laxa or occipital horn syndrome, deformities are as the names imply.

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There are many things in this world that can’t be changed no matter how hard you try. That’s why you must not hesitate when the time comes where you have to give it all you’ve got.







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