Question

an immune molecule that connects to a specific antigen, triggering the immune response is a(n)
lymphocyte
antibody
complement
mast cell

Explanation:

• Lymphocytes are immune cells, not molecules that directly bind antigens to trigger response.
• Antibodies are Y-shaped immune proteins that specifically bind to unique antigens, which initiates the immune response (like neutralization or marking for destruction).
• Complement proteins assist immunity but do not specifically connect to a single antigen to trigger the response.
• Mast cells are immune cells involved in allergic reactions, not the molecule described.

Answer:

antibody