Question

A codon is a set of three nucleotides that correspond to a specific amino acid. The table below shows various DNA codons and their corresponding amino acids.

Amino Acid DNA Codon(s)
Alanine GCT, GCC, GCA, GCG
Arginine AGA, AGG, CGT, CGC, CGA, CGG
Asparagine AAT, AAC
Aspartic Acid GAT, GAC
Cysteine TGT, TGC
Glutamic Acid GAA, GAG
Glutamine CAA, CAG
Glycine GGT, GGC, GGA, GGG
Histadine CAT, CAC
Isoleucine ATT, ATC, ATA
Leucine CTT, CTC, CTA, CTG, TTA, TTG
Lysine AAA, AAG
Methionine (Start) ATG
Phenylalanine TTT, TTC
Proline CCT, CCC, CCA, CCG
Serine TCT, TCC, TCA, TCG, AGT, AGC
Threonine ACT, ACC, ACA, ACG
Tryptophan TGG
Tyrosine TAT, TAC
Valine GTT, GTC, GTA, GTG
Stop TAA, TAG, TGA
8
In the DNA strand below, two nucleotides were reversed during replication.


What will happen when the replicated DNA strand is translated into a protein?
A.
No amino acids will be added at all.
B.
Tyrosine will be added instead of isoleucine.
C.
The same amino acid, isoleucine, will be added.
D.
Nothing will happen.

Answer 1

B. Tyrosine will be added instead of isoleucine.