Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

element 6

genetics

QuestionAnswer
Explain the wobble hypothesis in protein synthesis explains why the third base in a codon may differ and be recognised by the same tRNA and therefore code for the same amino acid. The wobble hypothesis states that the first and second bases must pair in the watson-crick manner but 3rd less constrained
explain the terms universal and degenerate with reference to the genetic code The same genetic code is seen in most living organisms so is described as universal. More than one codon exists for each amino acid so the code is degenerate
Size of ribosomes in prokaryotes 70s (50s + 30s)
Size of ribosomes in eukaryotes 80s (60s + 40s)
Outline amino acid activation and attachment to tRNA Amino acid (correct for enzyme) and ATP (giving off pyrophosphate) become adenylated amino acid (AA-AMP). tRNA then replaces the AMP and become aminoacyl tRNA bound by a high energy ester bond (AA-tRNA). Aminoacyl tRNA synthetase catalyses all this.
Function of modified bases in tRNA 1. mediate recognition by amino-acyl tRNA synthetase. (different synthetase for each aa) 2. increases number of codons a tRNA can recognise
Promoter site in prokaryotes pribnow box (tataat)
Created by: libbyw1