Question

a section of dna that codes for a protein is called a

a phosphate backbone

b nitrogen base

c codon

d gene

Explanation:

A gene is a segment of DNA that contains the instructions for building a specific protein. Phosphate backbone is part of DNA structure but not coding for proteins. Nitrogen - bases are components of DNA. A codon is a triplet of nucleotides in mRNA, not a DNA segment coding for a protein.

Answer:

d. gene