Can someone me with answering questions 3, 6, and 7? (most preferably 6 and 7) asap! !

How does a bone marrow transplant treat sickle cell disease?

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

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