Question

question 1 (1 point)
which of the following is not a function of antibodies?
promoting phagocytosis
neutralizing toxins
killing infected cells
tagging pathogens for destruction
question 2 (1 point)
how do vaccines confer immunity?
by activating memory cells
by directly killing pathogens
by inhibiting complement activation
by providing pre - formed antibodies

Explanation:

Question 1

Antibodies can promote phagocytosis (opsonization), neutralize toxins, and tag pathogens (opsonization). Killing infected cells is mainly done by cytotoxic T - cells, not antibodies.

Vaccines work by introducing antigens (inactive or weakened pathogens). These antigens activate the immune system, leading to the production of memory cells. When the actual pathogen invades later, memory cells can quickly respond. Vaccines do not directly kill pathogens (that's the job of the immune response after vaccination), do not inhibit complement activation (complement is part of the immune response that can be activated in a vaccinated - induced immune response), and most vaccines do not provide pre - formed antibodies (except for some passive immunization cases which are not the general mechanism of vaccines).

Answer:

Killing infected cells

Question 2