(a) variable region of heavy chain
(b) variable region of both heavy and light chain
(c) variable region of light chain
(d) constant region of both light and heavy chain.
- Which one of the following statements is correct with
respect to immunity?
(a) Preformed antibodies need to be injected to treat
the bite by a viper snake.
(b) The antibodies against small pox pathogen are
produced by T-lymphocytes.
(c) Antibodies are protein molecules, each of which
has four light chains.
(d) Rejection of a kidney graft is the function of
B-lymphocytes.
- The sites on antigen that are recognized by antibodies
and receptors present on T- and B-cells are
(a) antigenic determinants
(b) epitopes
(c) paratopes
(d) both (a) and (b).
- A person may die due to allergic reaction or an
anaphylactic shock which is characterized by
(a) constriction of peripheral blood vessel
(b) blood capillaries become highly permeable causing
loss of fluid from the blood
(c) drastic increase in the blood pressure
(d) all of the above.
- Bursa of Fabricius is an important organ of birds. This
organ is associated with
(a) generation of basophils
(b) production of uric acid
(c) metabolism of fatty acid
(d) generation of B-cell.
- How does vaccination work?
(a) The immune system produces antibodies which stay
in the blood.
(b) Memory lymphocytes are produced. They remain in
the body to fight off any future infection with the
live pathogen.
(c) The dead pathogen stays in the body and constantly
stimulates the immune system.
(d) All of the above.
- Select the correct statement with respect to diseases
and immunisation.
(a) If due to some reason B and T lymphocytes are
damaged, the body will not produce antibodies
against a pathogen.
(b) Injection of dead/inactivated pathogens causes
passive immunity.
(c) Certain protozoans have been used in mass
production of hepatitis B vaccine.
(d) Injection of snake antivenom against snake bite is
an example of active immunisation.
- The Human Immuno deficiency Virus causes AIDS by
(a) depleting CD 4 + T-helper lymphocytes
(b) increasing CD 4 + T-helper lymphocytes
(c) depleting CD 54 + T-helper lymphocytes
(d) depleting CD 4 + T-helper erythrocytes.
- Which is an autoimmune disease?
(a) Cancer
(b) Asthma
(c) Erythroblastosis foetalis
(d) Rheumatoid arthritis
- A child stung by a bee experiences respiratory distress
within minutes and lapses into unconsciousness. This
reaction is probably mediated by
(a) IgE antibody (b) sensitized T cells
(c) complement (d) IgG antibody.
- Which of the following substances will not stimulate
an immune response unless they are bound to a larger
molecule?
(a) Antigen (b) Virus
(c) Hapten (d) Antibody
- A child has no detectable T or B cells. This
immunodeficiency is most probably the result of a
defect in
(a) the thymus
(b) the bursal equivalent
(c) T cell-B cell interaction
(d) stem cells originating in the bone marrow.
- The class of immunoglobulin present in highest
concentration in the blood of a human newborn is
(a) IgM (b) IgA
(c) IgG (d) IgE.
- Human Immuno Deficiency Virus (HIV) has a protein
coat and a genetic material which is
(a) double stranded RNA
(b) double stranded DNA
(c) single stranded DNA
(d) single stranded RNA.
Answer KEy
- (d) 2. (a) 3. (d) 4. (a) 5. (a)
- (b) 7. (b) 8. (a) 9. (d) 10. (b)
- (d) 12. (d) 13. (a) 14. (a) 15. (d)
- (a) 17. (c) 18. (d) 19. (c) 20. (d)
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