Which of the following statements concerning viruses is FALSE?

A) Viruses never contain both DNA and RNA.

B) Viruses enter a cell to complete the replication they have begun extracellularly.

C) Some viruses have an outer membrane called an envelope.

D) Viral capsids can assume one of three basic shapes.

E) Tobacco mosaic virus was the first virus to be discovered and characterized.

The outermost layer of a virion fulfills which of the following functions of the virus?

A) protection

B) recognition

C) replication

D) protection and recognition

E) recognition and replication

During the intracellular state, a virus exists as

A) a lipid.

B) a protein.

C) a nucleic acid.

D) both a protein and a nucleic acid.

E) both a lipid and a nucleic acid.