USMLE Forums

USMLE Forums (https://www.usmle-forums.com/)
-   USMLE Step 1 Forum (https://www.usmle-forums.com/usmle-step-1-forum/)
-   -   tRNA Anti-codon Wobble (https://www.usmle-forums.com/usmle-step-1-forum/1083-trna-anti-codon-wobble.html)

lee-usmle 12-16-2009 11:35 AM

tRNA Anti-codon Wobble
 
It has been documented that tRNA wobbles in most of the amino acids attached to it making the third nucleotide of it's anti-codon redundant when signaling amino acid insertion as the mRNA is translated.
This phenomenon is applicable to all except which of the following two amino acids?
a- leucine and isoleucine
b- methionine and tryptophan
c- phenylalanine and tyrosine
d- arginine and glycine

PS: I am the author of this question, I made it myself

lemontea88 12-16-2009 06:18 PM

Wow this is a really good question! I know methionine is special, but didn't know Tryptophan is special too! :D

Thx lee, do come up with more questions please!:)

lee-usmle 12-16-2009 07:02 PM

Quote:

Originally Posted by lemontea88 (Post 3623)
Wow this is a really good question! I know methionine is special, but didn't know Tryptophan is special too! :D

Thx lee, do come up with more questions please!:)

So you got the right answer :)

The genetic code is redundant and degenerate in that several codons code for the same amino acid so that a change in the third nucleotide may not matter and this is how silent mutations occur. The exceptions are methionine and tryptophan both of which have only one codon coding for them.
The AUG for methionine also serves as a start codon.

zen228 04-16-2014 04:06 AM

this question kinda requires us to know the 16*16 GENE BOX
?????:confused:


All times are GMT -8. The time now is 01:14 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2019)