A-LevelBiologyNucleic acids and protein synthesisOct/Nov 2017Paper 1 Q251 Mark
The diagram shows the nucleotide sequence of a small section of a gene which is transcribed. GCGCGCGGCGCG The table shows the amino acids coded for by 10 mRNA codons. [Figure 25.1 - table of mRNA codons and amino acids] What is the order of the four amino acids in the polypeptide translated from this small section of a gene?
AAla-Ala-Cys-Ala
BAla-Arg-Gly-Ala
CArg-Ala-Pro-Arg
DArg-Arg-Thr-Arg
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of nucleic acids and protein synthesis within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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