Question

capsid
nucleic acid
projections
membrane
envelope
nuclear
membrane
nucleic acid
mitochondria
cellular
membrane
cilia
which of the following statements best compares the functions of projections and cilia?
a both projections and cilia are used to attach to a host.
b projections are used to attach to a host, while cilia are used for mobility.
c both projections and cilia are used for mobility.
d projections are used for protein synthesis, while cilia are used for osmosis.

Explanation:

1. Analyze the structures: The left is a virus (with projections) and the right is a eukaryotic cell (with cilia).
2. Function of virus projections: Viral projections (like spikes) help attach to host cells.
3. Function of cilia: Cilia on cells are used for movement (mobility) or moving substances.
4. Evaluate options:

• Option A: Cilia aren’t for host attachment (they’re on the cell, not to attach to a host), so A is wrong.
• Option B: Projections attach to host; cilia are for mobility. This matches their functions.
• Option C: Projections don’t help the virus move (viruses rely on host for movement), so C is wrong.
• Option D: Projections don’t do protein synthesis (virus uses host ribosomes), cilia don’t do osmosis. So D is wrong.

Answer:

B. Projections are used to attach to a host, while cilia are used for mobility.