Question

how is a gene best defined?○ three messenger rna molecules that code for a specific amino acid○ one long, condensed dna molecule coiled tightly around proteins○ a transfer rna nucleotide sequence specific for a particular amino acid○ a sequence of nucleotides that codes for a particular protein

Explanation:

A gene is a segment of DNA (a nucleotide sequence) that contains the instructions to produce a functional product, typically a protein. The other options are incorrect: three mRNA molecules relate to a codon (not a gene), condensed coiled DNA around proteins is chromatin, and tRNA sequences correspond to anticodons for amino acids, not genes.

Answer:

○ a sequence of nucleotides that codes for a particular protein