For a Couple of Decades, Biologists Knew the Nucleus Contained

Multiple Choice

For a couple of decades, biologists knew the nucleus contained DNA and proteins. The prevailing opinion was that the genetic material was proteins, and not DNA. The reason for this belief was that proteins are more complex than DNA. What was the basis of this thinking?

A) Proteins have a greater variety of three-dimensional forms than does DNA.
B) Proteins have two different levels of structural organization; DNA has four.
C) Proteins are made of 40 amino acids and DNA is made of four nucleotides.
D) Some viruses only transmit proteins.
E) A and B are correct.