Question

Portions of an MRNA strand that do not code for proteins are
A. exons
B. introns
C. caps
D. tails

Answer 1

Answer:

B) Introns

Explanation:

I took the quiz. Exons and Introns both make up MRNA strands, however only Exons code for proteins. Introns do not code for proteins and are removed before the protein is completed.