Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

5. DNA to RNA to Protein

Translation

Cell Biology

5. DNA to RNA to Protein

Translation

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Multiple Choice

Which ribosomal site of protein synthesis does the initiator tRNA bind to initiation translation?

A site

P site

E site

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Verified step by step guidance

Understand the role of tRNA in translation: tRNA molecules are responsible for bringing amino acids to the ribosome during protein synthesis. Each tRNA has an anticodon that pairs with a specific mRNA codon.

Learn about the ribosomal sites: The ribosome has three sites for tRNA binding - the A (aminoacyl) site, the P (peptidyl) site, and the E (exit) site.

Identify the function of each site: The A site is where the incoming aminoacyl-tRNA binds, the P site holds the tRNA with the growing polypeptide chain, and the E site is where the tRNA exits the ribosome after its amino acid has been added to the chain.

Focus on the initiation of translation: During the initiation phase, the small ribosomal subunit binds to the mRNA and the initiator tRNA, which carries methionine, binds to the start codon.

Determine the binding site for the initiator tRNA: The initiator tRNA binds directly to the P site of the ribosome, which is unique to the initiation phase, as it allows the polypeptide chain to start forming from the first amino acid.