AP Biology: Unit 6: Gene Expression and Regulation

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Question 6 · Unit 6: Gene Expression and Regulation · foundation

A segment of the coding DNA strand has sequence 5'-ATG GAA-3'. What is the corresponding mRNA segment before processing?A. 5'-UAC CUU-3'B. 5'-AUG GAA-3'C. 5'-ATG GAA-3'D. 5'-GAA AUG-3'

Question 14 · Unit 6: Gene Expression and Regulation · standard

A substitution changes a codon but not the amino acid incorporated into a protein. Which property best explains this outcome?A. All codons encode the same amino acid.B. The genetic code is redundant, with some amino acids specified by multiple codons.C. Every substitution creates a stop codon.D. Ribosomes never read mRNA.

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