| Ribosomes are complexes of ____ and protein. |
blood |
| In DNA, guanine forms three hydrogen bonds with ____. |
clone |
| The primary structure of DNA is its ____ sequence. |
cytosine |
| The three alleles for human ____ type are named A, B, and O. |
nucleotide |
| Adenine and guanine are ____ (two rings) nucleotide bases. |
purine |
| UAG, UGA, and UAA are ____ codons. |
rRNA |
| In DNA, adenine forms two hydrogen bonds with ____. |
stop |
| A ____ is an identical genetic copy. |
thymine |
