tRNA Anti-codon Wobble - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 12-16-2009
Ex-USMLE Forums Staff
 
Steps History: 1+CK+CS+3
Posts: 753
Threads: 106
Thanked 2,185 Times in 464 Posts
Reputation: 2233
Molecular 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
Reply With Quote Quick reply to this message
The above post was thanked by:
Cubandoc (07-18-2014), lemontea88 (12-16-2009), memory (12-23-2009), spasemaster (01-19-2015)



  #2  
Old 12-16-2009
USMLE Forums Veteran
 
Steps History: ---
Posts: 238
Threads: 56
Thanked 201 Times in 60 Posts
Reputation: 231
Default

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

Thx lee, do come up with more questions please!
Reply With Quote Quick reply to this message
  #3  
Old 12-16-2009
Ex-USMLE Forums Staff
 
Steps History: 1+CK+CS+3
Posts: 753
Threads: 106
Thanked 2,185 Times in 464 Posts
Reputation: 2233
Default

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

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.
Reply With Quote Quick reply to this message
The above post was thanked by:
ahassan (12-17-2009), Laurentiu (12-18-2009), memory (12-23-2009), phlebgirl (06-09-2014)
 
  #4  
Old 04-16-2014
USMLE Forums Newbie
 
Steps History: Not yet
Posts: 5
Threads: 0
Thanked 1 Time in 1 Post
Reputation: 11
Default

this question kinda requires us to know the 16*16 GENE BOX
?????
Reply With Quote Quick reply to this message



Reply

Tags
Molecular-Biology-, Step-1-Questions

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
The effect of an Anti-Androgen Anti-Aldosterone Drug! scopusmount USMLE Step 1 Forum 8 11-16-2011 11:06 AM
why mitochondria encodes its own tRNA ? laurier USMLE Step 1 Forum 1 08-11-2011 08:17 AM
This is the codon, what will be the mRNA! usluipek USMLE Step 1 Forum 15 06-14-2011 04:45 AM
SLE ANTIBODY ? Anti DNA. Anti SMITH kemoo USMLE Step 2 CK Forum 2 06-09-2011 01:15 AM
Stop codon HELP! singapur_md USMLE Step 1 Forum 1 05-27-2011 11:18 AM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)