Question

definition
the outside of a virus that is made of proteins.
choose an answer
1 protein coat
2 envelope
3 cell wall
4 capsule

Explanation:

The protein - based outer layer of a virus is called the protein coat. An envelope is often lipid - based and not always present. Viruses don't have cell walls (which are characteristic of plant, fungal and some bacterial cells). A capsule is more associated with bacteria.

Answer:

1. protein coat