Question

A true statement about antibodies is that

• A. They are protein molecules produced by lymphocytes.
• B. They bind to invading microorganisms.
• C. Together with macrophages and blood proteins kill or incapacitate pathogens.
• D. All of the above.

Answer 1

The correct option is A They are protein molecules produced by lymphocytes.

An antibody also known as an immunoglobulin (Ig), is a proteinaceous substace produced by B lymphocytes, that is used by the immune system to identify and neutralize pathogens (antigens) such as bacteria and viruses.