Question

which of the following is true regarding bacterial cells?
multiple choice
they have one identifiable antigen that binds to antibodies.
they have two epitopes per cell.
they have many different epitopes which each bind to specific antibodies.
they have many different epitopes which all bind to the same antibody.
they are not antigenic.

Explanation:

Bacterial cells are complex structures. Antigens are substances that can trigger an immune response. Epitopes are the specific parts of an antigen that antibodies bind to. Bacterial cells have multiple antigens, and each antigen can have multiple epitopes. Each epitope binds to a specific antibody.

• The first option is incorrect because bacterial cells have multiple antigens, not just one.
• The second option is incorrect as bacterial cells have more than two epitopes (due to multiple antigens with their own epitopes).
• The fourth option is wrong because different epitopes bind to different antibodies (based on antibody - antigen specificity).
• The fifth option is incorrect since bacterial cells are antigenic (they can cause an immune response).

Answer:

They have many different epitopes which each bind to specific antibodies.