A-LevelBiologyNucleic acids and protein synthesis9700/12 · Oct/Nov 2020 · Q221 Mark
The DNA sequence CCAAGAAGTCGACAAACA is translated to synthesise the amino acid chain gly-ser-ser-ala-val-cys. As a result of a mutation, the sequence length of the amino acid chain is shortened from six to two amino acids. A stop codon in mRNA is UGA. Which base in the DNA sequence was changed by the mutation?
AA
BC
CG
DT
✓ Correct answer
C: G
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Nucleic acids and protein synthesis and see which topics are most likely to come up next.
Sign up free →