The nine essential amino acids are... a) all present in incomplete proteins

b) not made by the body.

c) not found in foods

d) made by the body

Viruses ) manufacture their own atp, proteins, and nucleic acidsb) use the host cell to copy themselves and make viral proteinsc) use the host cell to copy themselves and then viruses synthesize their own proteinsd) metabolize food and produce their own atp