Atp supplies the energy for muscle contraction. true or false?

This is true. ATP in general is considered to be the universal energy currency of the body. And muscles in this aspect are no exception. ATP as an energy source is continuously used in muscle contraciton and allows muscles to contract on an ongoing basis. 

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.