本题目来源于试卷: SL/HL Topic D1.2 Protein synthesis，类别为 IB生物学
[问答题]
9. Translation and transcription both occur unidir2fq:uoc 8otohqazo;8 1 4ei)a ectionally in a 5’ 3’ directji6nu/k cfj4fk xaafm4: m68 0ion. Explain why this is essential in the case of tra4xfak 4 0fnaj6kmju:fc/i m86nslation.
参考答案: The small subunit of the ribosome attaches at the 5’ end of the mRNA.
The small subunit moves in a 5‘ to 3’ direction towards the start codon.
The small subunit then moves to the initiator.
The large subunit then attaches to the small subunit to initiate translation.
The start codon and initiator codon are in the correct sequence moving in a 5’3’ direction.
The start codon and initiator codon are at the 5’ end of the mRNA molecule.
Codons read in a different direction would produce a different polypeptide sequence.
本题详细解析:
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