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IB Biology HL D1.2.10 Elongation of Polypeptide Questions

Explore codon-by-codon elongation, peptide-bond formation and polysomes that produce many copies of a polypeptide in IB Biology HL D1.2.10.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain that ribosomes move along mRNA one codon at a time from the start codon while the polypeptide grows.
  • Explain that peptide bonds join successive amino acids and that tRNAs move through ribosome sites during elongation.
  • Explain how multiple ribosomes translating one mRNA form a polysome and increase production of the same polypeptide.

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Study D1.2.10—Elongation of polypeptide conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D1.2.10 Elongation of Polypeptide Questions question 1

[Maximum number: 1]

The image shows a polysome in a bacterial cell.

Figure for Question IB Biology HL D1.2.10 Elongation of Polypeptide Questions question 1 — IB Biology HL

How many genes have been transcribed?

A

1

B

2

C

3

D

4

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