Which statement is true?
- A virion contains DNA and RNA.
- Viruses are acellular.
- Viruses replicate outside of the cell.
- Most viruses are easily visualized with a light microscope.
The viral ________ play(s) a role in attaching a virion to the host cell.
- both b and c
- all have a round shape
- cannot have a long shape
- do not maintain any shape
- vary in shape
The observation that the bacteria genus Chlamydia contains species that can only survive as intracellular parasites supports which viral origin hypothesis?
A scientist discovers a new virus with a linear, RNA genome surrounded by a helical capsid. The virus is most likely a member of which family based on structure classification?
- Rabies virus
- Influenza viruses