The table below gives the ribosome's P and A sites in different states when it is engaged in protein synthesis. Ribosome P site | Ribosome A site A. filled with tRNA attached to growing polypeptide | filled with amino-acylated tRNA B. filled with amino-acylated tRNA | filled with tRNA attached to growing polypeptide C. empty | filled with amino-acylated tRNA D. filled with uncharged tRNA | filled with tRNA attached to growing polypeptide E. filled with tRNA attached to growing polypeptide | empty In the Table, which one gives the status of the P site and the A site at the instant just before the ribosome forms a peptide bond? A. row A of the table B. row B of the table C. row C of the table D. row D of the table E. row E of the table
Added by Justin M.
Close
Step 1
The ribosome has two sites: P (peptidyl) and A (aminoacyl). Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 80 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A ribosome has a tRNA in its P site that is attached to a polypeptide. The ribosome's A site is sitting over a stop codon. What will happen next? The stop amino acid will be added to the polypeptide chain, and the polypeptide will be released. A terminator tRNA will bind in the A site of the ribosome, and the polypeptide will be released. A protein called a release factor will bind to the A site and the bond between the tRNA in the P site and the polypeptide chain will be hydrolyzed. The ribosome will shift three nucleotides toward the 3' end of the mRNA to expose the next codon in the A site
John N.
Shyam P.
Madhur L.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD