|In DNA, guanine forms three hydrogen bonds with ____.
|A ____ is a regulatory sequence upstream (5') of a gene.
|A ____ is a sequence of three nucleotides in DNA or mRNA.
|Any observable trait of an organism is a ____.
|A mutation can be an insertion, deletion, or ____ of nucleotides.
|A protein's amino acid sequence determines its ____.
|Biological information flows from ____ to RNA to protein.
|Ribosomes are complexes of ____ and protein.