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IB Biology HL D1.2.10 Elongation of Polypeptide Questions

In IB Biology HL D1.2.10, ribosomes advance along mRNA one codon at a time and peptide bonds join amino acids. Multiple ribosomes can translate the same mRNA together as a polysome.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Describe how the ribosome moves along mRNA during elongation as tRNAs bring amino acids to the growing polypeptide.
  • Identify peptide bonds as the links formed between amino acids during polypeptide elongation.
  • Explain how a polysome lets multiple ribosomes translate one mRNA and produce many copies of the same polypeptide.

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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