What are the two types of nucleic acids which viruses may have?

All viruses contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid. Some viruses are also enclosed by an envelope of fat and protein molecules. In its infective form, outside the cell, a virus particle is called a virion.

Explanation:

google my dude. if it doesn't show up ask me.

the supermassive black hole is in the middle of the galaxy.