Before the Discovery of DNA, the Hereditary Material Was Thought

Multiple Choice

Before the discovery of DNA, the hereditary material was thought to be made of proteins and not nucleic acids because

A) nucleic acids are made up of 20 different bases, whereas proteins are made up of only five amino acids.
B) protein subunits can combine to form larger proteins.
C) proteins seemed to be much more chemically diverse.
D) proteins can be enzymes.
E) None of the above