A Levels Biology (9700)•9700/13/O/N/22
Explanation
Triplet genetic code and post-translational processing
Steps:
- Mature alpha-globin has 141 amino acids after removal of the first.
- Primary translation product had 142 amino acids.
- mRNA coding region uses 3 nucleotides per amino acid.
- Total nucleotides = 142 × 3 = 426.
The calculation yields 426 nucleotides, not matching any option exactly. Not enough information.
Final answer: Not enough information.
Topic: Protein synthesis
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