A virus is a microscopic parasite that infects cells in biological organisms, they reproduce only by invading and controlling other cells as they lack the cellular machinery for self reproduction. Additionally, viruses contain at least one unique protein synthesized by specific genes in the nucleic acid, the proteins forms a shell called capsid around the nuclei acid.
B. distance and mass because as distance increases, the gravitational pull decreases and when it decreases, the gravitational pull increase. Also the mass increases, so does the attraction and opposite if it decreases.
Answer:
Dissociation of the myosin head from the actin filament requires the binding of ATP (I).
