Question

what is a gene?
a unit of dna that contains code for the creation of one protein
b building blocks of proteins
c the process of making proteins
d none of the above

Explanation:

A gene is a unit of DNA that contains the code for the creation of one or more proteins. Building blocks of proteins are amino - acids, and the process of making proteins is called protein synthesis.

Answer:

A. unit of DNA that contains code for the creation of one protein