Question

Which one by itself does not possess the ability to synthesize its own proteins?

Answer 1

Answer:

A virus

Explanation:

A virus requires a host cell to implant proteins into so that the host cell can create new virus cells.  The virus essentially hijacks the cell.

All other listed cells can create new copies of their own proteins.

Cheers.

Answer 2

A virus

When a virus infects a bacterial cell, often new viruses are assembled and released when the host bacterial cell is lysed. If these new viruses go on to infect new bacterial cells the host cells may not be lysed. What is the most plausible explanation for this? When a virus infects a bacterial cell, often new viruses are assembled and released when the host bacterial cell is lysed. If these new viruses go on to infect new bacterial cells the host cells may not be lysed. What is the most plausible explanation for this? The bacterial cell must be resistant to infection by the virus. The virus has entered the genome of the bacterial cell and is in the lysogenic stage. The virus carries genes that confer resistance to the host bacterial cell. The host bacterium couples the viral infection with transformation.