A) Which of these does a virus need in order to multiply? (1 point)
Chloroplasts from a host cell
A host cell to replicate the virus’s DNA
A host cell to provide oxygen for the virus
New ADP from a host cell
B) A host cell to replicate the virus's DNA
A virus needs a host cell to replicate its DNA in order to multiply. Therefore, the correct answer is: A host cell to replicate the virus's DNA.
To determine which of these options a virus needs in order to multiply, we can evaluate each option and understand the role it plays in the viral replication process.
A) Chloroplasts from a host cell: Viruses do not require chloroplasts, as they mainly infect and hijack the machinery of animal and plant cells. Chloroplasts are found only in plant cells and are responsible for photosynthesis, which is unrelated to viral replication. Therefore, a virus does not need chloroplasts from a host cell to multiply.
B) A host cell to replicate the virus's DNA: This option is correct. Viruses do require a host cell in order to replicate their DNA. Viruses are considered obligate intracellular parasites, meaning they cannot replicate on their own and rely on host cells to produce new viral particles. The host cell provides the necessary machinery and resources for the virus to replicate its genetic material.
C) A host cell to provide oxygen for the virus: Viruses do not require oxygen for their replication process. Unlike cells, viruses do not possess cellular respiration mechanism and are incapable of utilizing oxygen. Therefore, a host cell is not needed to provide oxygen for the virus.
D) New ADP from a host cell: ADP (adenosine diphosphate) is an energy-carrying molecule found in cells. Although some viruses may manipulate the host cell's metabolic processes to obtain energy, it is not a universal requirement for viral replication. So, a host cell is not needed to provide new ADP for the virus.
In summary, the correct option is B) A host cell to replicate the virus's DNA.