IB Biology SL D1.2.10 Elongation of Polypeptide Questions
Explore how ribosomes add amino acids one by one as they move along mRNA during polypeptide elongation in IB Biology SL D1.2.10.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain that ribosomes move along mRNA one codon at a time and add amino acids to a growing polypeptide.
- Identify peptide bonds as the links joining successive amino acids during elongation.
- Use a polypeptide-length or translation representation to infer different stages of elongation and the completed product.
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IB Biology SL D1.2.10 Elongation of Polypeptide Questions question 1
[Maximum number: 2]
Six polypeptides are shown in the diagram. Explain the different lengths of these polypeptides.
a. ribosome moves along the mRNA molecule/structure X moves along Y ;
b. amino acids added (to the polypeptide) one by one
OR
some polypeptides are still in formation / OWTTE;
c. more amino acids added to the polypeptide by the ribosome on the right;
2
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