| Cytosine (C) and thymine (T) are ____ nucleotide bases. |
amino acid |
| In DNA, adenine forms two hydrogen bonds with ____. |
expression |
| During replication, ____ separates the DNA strands. |
helicase |
| Gene ____ results in the production of protein or RNA. |
mutation |
| The primary structure of a protein is its ____ sequence. |
pyrimidine |
| A mutation can be an insertion, deletion, or ____ of nucleotides. |
shape |
| A protein's amino acid sequence determines its ____. |
substitution |
| A change in the sequence of a chromosome is a ____. |
thymine |
