Linus Pauling demonstrated that:

A) the structure of hemoglobin was altered by a mutation of a single gene.
B) mutations only caused defects in enzymes.
C) mutations alter the structure of RNA, but not proteins.
D) mutations were inherited.
E) the structure of hemoglobin was altered by mutations in any of a dozen genes.

Hemoglobin

A protein in red blood cells responsible for transporting oxygen from the lungs to the rest of the body.

Mutation

A change in the DNA sequence within an organism's gene or chromosome, leading to diversity within species and populations.

Gene

A segment of DNA that serves as a unit of hereditary information; includes a transcribable DNA sequence (plus associated sequences regulating its transcription) that yields a protein or RNA product with a specific function.