mutations in dna molecules can occur when
a ) a dna enzymes attaches to an rna codon
b ) a change occurs in dna nucleotides
c ) replication of dna is exact
d ) rna codons are replaces by dna nucleotides
a ) a dna enzymes attaches to an rna codon
b ) a change occurs in dna nucleotides
c ) replication of dna is exact
d ) rna codons are replaces by dna nucleotides