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