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IB Biology HL D1.2.17 Hl Translation Initiation Questions

Explore how the ribosome assembles at AUG and organizes initiator tRNA and subsequent tRNA movement through A, P and E sites in IB Biology HL D1.2.17.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Recognize initiation as the small ribosomal subunit binding mRNA at AUG before the large subunit joins with initiator tRNA in the P site.
  • Explain A, P and E site roles: incoming aminoacyl-tRNA binds A, P holds initiator or growing-chain tRNA, and E releases an uncharged tRNA.

IB Biology HL D1.2.17 Hl Translation Initiation Questions question 1

[Maximum number: 3]

The structure of a transfer RNA (tRNA) molecule is shown in the diagram. The attached amino acid, which is aspartic acid, is indicated by the arrow.

Figure for Question IB Biology HL D1.2.17 Hl Translation Initiation Questions question 1 — IB Biology HL

During translation, three binding sites for tRNA molecules are used. Outline how each of these binding sites is used.

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