10. Which of these does a virus need to multiply?

A. chloroplasts from a host cell
B. a host cell to provide oxygen
C. new ADP from a host cell
D. a host cell to replicate the virus's DNA***

yeah, D.

(haha nice name)

Thanks :p

D. a host cell to replicate the virus's DNA

To determine which of the options a virus needs to multiply, we should examine each choice:

A. Chloroplasts from a host cell: Chloroplasts are the organelles responsible for photosynthesis in plant cells and some algae. Viruses do not require chloroplasts as they primarily infect animal cells, which lack chloroplasts.

B. A host cell to provide oxygen: While oxygen is essential for living organisms, viruses do not depend on oxygen for their replication process. Therefore, a virus does not require a host cell to provide oxygen.

C. New ADP from a host cell: ADP, or adenosine diphosphate, is involved in cellular energy metabolism. However, viruses do not rely on ADP from the host cell to multiply. They use the host cell's energy machinery to produce ATP (adenosine triphosphate), which is then used in the replication process.

D. A host cell to replicate the virus's DNA: This option is correct. Viruses need a host cell to replicate their DNA. Viruses are intracellular parasites that hijack the host cell's machinery to produce copies of their genetic material. They lack the ability to replicate their DNA on their own and therefore require a host cell for this process.

Therefore, the correct answer is D. A host cell to replicate the virus's DNA.