Mutations in DNA molecules can occur when
A. RNA codons are replaced by DNA nucleotides
B. a DNA enzyme attaches to an RNA codon
C. a change occurs in DNA nucleotide bases
D. replication of DNA is exact
A. RNA codons are replaced by DNA nucleotides
B. a DNA enzyme attaches to an RNA codon
C. a change occurs in DNA nucleotide bases
D. replication of DNA is exact