IB Biology HL 1.2.17 Translation initiation Question Bank
Practise IB Biology HL 1.2.17 by applying translation initiation concepts to exam-style questions.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Practise IB Biology HL 1.2.17 by applying translation initiation concepts to exam-style questions.
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.

During translation, three binding sites for tRNA molecules are used. Outline how each of these binding sites is used.
a. binding sites are on the ribosome;
b. A site for attachment/arrival/binding of an tRNA (carrying an amino acid);
c. P site where a peptide bond is made/where amino acid linked to polypeptide OR
where tRNA is holding the growing polypeptide
OR
where the polypeptide is elongated
OR
where tRNA carrying methionine/MET/tRNA with the start codon binds during initiation;
d. E site for exit/detachment of (free) tRNA from ribosome;
3
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