Question

1. a virus can reproduce only inside a cell. once inside, the virus causes the cell to make many new copies of the virus. in an animal, which part of the cell is responsible for keeping viruses out? cell membrane cell wall nucleus vacoule

Explanation:

• Cell membrane: It is a selectively - permeable barrier. It controls the movement of substances (including viruses) in and out of the cell.
• Cell wall: Animal cells do not have a cell wall. Plant cells, fungi cells, and some prokaryotic cells have cell walls.
• Nucleus: It is the control center of the cell, containing the cell's genetic material. It is not directly responsible for keeping viruses out.
• Vacoule: In animal cells, vacuoles are usually small and their main functions include storage (e.g., of nutrients, waste products). They are not involved in preventing virus entry.

Answer:

Cell membrane