immune response

Question 1

What is an antigen

Answer 1

(a) molecule / part of molecule / protein / glycoprotein / named molecule;
that stimulates an immune response / eq;

Question 2

Describe how B-lymphocytes respond when they are stimulated by antigens

Answer 2

divide by mitosis / form clones; produce plasma cells; (plasma cells)
make antibodies;
(plasma cells) produce memory cells;

Question 3

Suggest which labelled component of the virus is most likely to act as an antigen. Give a reason for your answer

glycoprotein is labelled

Answer 3

glycoprotein AND
different shape to body proteins / RNA and reverse transcriptase
inside virus / phospholipids same as body’s / on the surface
of the virus;

Question 4

Phagocytes and lysosomes are involved in destroying microorganisms. Describe how.

Answer 4

Phagocytes engulf pathogens / microorganisms;

Enclosed in a vacuole / vesicle / phagosome;

Lysosomes have enzymes;

That digest / hydrolyse molecules / proteins / lipids / microorganism