drpkaur
Forum Guru
Topics: 195
Posts: 808
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An IMG just finished her Step 2CK, and recieved his visa to take step 2CS in Philadelphia on July 24, 2006. This morning,she arrived at NewArk airport from South India after 22 hours journey. She started to feel tired and dizzy, and seems to be not yet well adjusted to the time changes, well known as jet lag. She consulted one of her friend who is a resident in New Jersy. Her friend told her about taking melatonin tablet to treat jet-lag, so that she can be better prepared for her upcoming CS. What is the precursor of melatonin ?
a. Arginine
b. Phenylalanine
c. Tyrosine
d. Melanin
e. Tryptophan
f. Histidine
g. Serotonin
h. Glycine
i. Porphyrin
j. Niacin
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| Ivil
Forum Senior
Topics: 8
Posts: 169
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melatonin is 5 methoxy N acetyltryptamine, derived from tryptophan
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| klimt
Forum Guru
Topics: 27
Posts: 605
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it's E - tryptophan produces: Niacin, Melatonin, Serotonin = NMS
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| drpkaur
Forum Guru
Topics: 195
Posts: 808
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Good Ivil and Klimt..
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| muzammil
Forum Guru
Topics: 16
Posts: 654
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niice q
agree that the answer is tryptophan
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