Overview of innate and adaptive immunity

1. Which of the following does not protect body surfaces:

 A  Skin.
 B  Mucus.
 C  Gastric acid.
 D  Salivary amylase

Ans.D  The enzyme splits starch and is of importance for digestion but not for protection.

2. Lysozyme:

 A.  Activates complement.
 B  Is a proteolytic enzyme.
C Splits peptidoglycan.
D   Is released by mast cells.

Ans. D Lysozyme splits the peptidoglycan of bacterial cell walls.

3. Plasma cells:

 A  Have a thin layer of cytoplasm
 B  Are derived from T-cells
 C  Develop into B-cells
 D  Have a highly developed rough endoplasmic reticulum

Ans. D Plasma cells secrete large amounts of antibody and therefore require well developed ER in order to make sufficient amounts of this protein.

4.A plasma cell secretes:

 A  Antibody of a single specificity related to that on the surface of the parent B-cell
 B  Antibody of two antigen specificities
 C  The antigen it recognizes
 D  Many different types of antibo

Ans. A  A single plasma cell secretes millions of molecules of antibody but they are all identical and will be related to the single specificity of antibody used as the antigen receptor on the B-lymphocyte from which the plasma cell was derived.

Thank you for visiting my video tutorial /blog.Please feel free to share your comment on this

article ,Please subscribe and share the articles to get more such articles.