Cells need many chemicals, but perhaps you are thinking of DNA.
It needs an energy source, raw materials(oxygen, glucose), a suitable environment, and DNA.
Your body needs a enzyme called insulin which regulates sugar in the blood.
atp
Your cells need oxygen to turn food into energy, reproduce, and basically perform all of their tasks.
They both need moisture and both produce spores to reproduce.
Bacteria are able to reproduce on their own while viruses need a host to "hijack" so they can reproduce. Bacteria have metabolisms, catabolic and anabolic biochemical reactions going on in their cells all the time. Viruses do not. Bacteria can grow in size to a certain extent while viruses do not change in this regard. The definition of living things classify bacteria as a living thing, while viruses are not.
What are the six needs of living things? You need cells to survive. Some organims are anaerobic and can survive even without the oxygen. The only thing they need are anorganic substances for building their tissues.
Life
tRNA
this is so that the cells can grow and reproduce
yes it does
reproduce.
Need to repair damaged cells and Increase number of cells
Viruses need living cells for reproduction .
So they can survive, And reproduce
Because the cells themselves need energy to perform their specific function, and to reproduce!
They are made of cells, they need energy, they reproduce.
nucleic acids
Virus need a working DNA replicating machinary so they can be reproduce only in living cell.
Some creatures are asexual because of their ability to reproduce on their own. Most creatures need intercourse to reproduce but because of cells in their body, that is the thing they don't need.