Table of contents

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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

Before translation initiation, which subunit of the ribosome is recruited to the mRNA first?

Small subunit

Large subunit

Both subunits are recruited to the mRNA at the same time

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Verified step by step guidance

Understand the process of translation initiation in eukaryotic cells, which involves the assembly of the ribosome on the mRNA to begin protein synthesis.

Recognize that the ribosome is composed of two subunits: the small subunit and the large subunit.

Learn that during translation initiation, the small ribosomal subunit is the first to bind to the mRNA. This is a critical step in scanning the mRNA for the start codon.

Note that the small subunit, along with initiation factors and the initiator tRNA, forms the pre-initiation complex that scans the mRNA for the AUG start codon.

Once the start codon is recognized, the large ribosomal subunit joins the small subunit to form the complete ribosome, allowing translation to proceed.