Diseases in Humans and Immunity, Class 12 Biology NCERT Solutions

1. There will be total 20  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. Antigenic determinant sites bind to which portion of an antibody molecule?
(1) Light chain (2) Heavy chain
(3) Intermediate chains (4) Plasma cells

  1 and 2 are correct

 2 and 4 are correct

 1, 2, 3 are correct

 1 and 3 are correct

Question 1 of 20

2. Anti venom against snake poison contains:

  Antigens

 Enzymes

 Antigen-antibody complexes

 Antibodies

Question 2 of 20

3. Formation of antibodies within our body is called:

  Innate immunity

 Acquired immunity

 Passive immunity

 Active immunity

Question 3 of 20

4. Antibodies are produced by:

  T-cells

 B-cells

 Monocytes

 Phagocytes

Question 4 of 20

5. Japanese encephalitis is transmitted by

  Tse tse fly

 Sand fly

 Housefly

 Mosquito

Question 5 of 20

6. The sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in:

  Salivary glands of mosquito

 Intestine of human

 Liver of human

 RBCs of mosquito

Question 6 of 20

7. The organisms which cause diseases in plants and animals are called:

  Worms

 Pathogens

 Vectors

 Insects

Question 7 of 20

8. Where will you look for the sporozoites of the malarial parasite?

  Saliva of infected female Anopheles mosquito

 Spleen of infected humans

 Salivary glands of freshly moulted female Anopheles mosquito

 Red blood corpuscles of human suffering from malaria

Question 8 of 20

9. Which of the following vaccines are injected at the age of Months?

 Polio and BCG

  BCG and Hepatitis-B

 BCG and DTP-Hib

 DTP-Hib and Polio

Question 9 of 20

10. Which of the following is the unit of immune system?

  Chondrocyte

 Erythrocyte

 Lymphocyte

 Parasite

Question 10 of 20

11. Both sickle cell anaemia and Huntington’s chorea are:

 Congenital diseases

 Viral diseases

 Bacterial diseases

 Pollution-related diseases

Question 11 of 20

12. Immuno-deficiency syndrome could develop due to

  Defective liver

 AIDS virus

 Defective thymus

 Weak immune system

Question 12 of 20

13. The function of IgE is

  Protection from inhaled/ingested pathogens

 Mediate in allergic response

 Activation of B-cells

 Stimulation of complement system, passive immunity to foetus

Question 13 of 20

14. The chemical test that is used for diagnosis of typhoid is:

  ESR-Test

 PCR-Test

 Widal-Test

 ELISA-Test

Question 14 of 20

15. The disease chikunguniya is transmitted by

  Cockroach

 Aedes mosquitoes

 House flies

 Female Anopheles

Question 15 of 20

16. Antigen-binding site in an antibody, is found between:

 Two light chains

 One heavy and one light chain

 Either between two light chains or between one heavy and one light chain

 Two heavy chains

Question 16 of 20

17. Which immunoglobulin is largest in size?

  Ig D

 Ig A

 Ig E

 Ig M

Question 17 of 20

18. Short lived immunity acquired from mother to foetus across placenta or through mother’s milk to the infants is

 Passive immunity

 Innate non-specific immunity

 Active immunity

 Cellular immunity

Question 18 of 20

19. Each immunoglobin has two heavy chains and two light chains, the antigen binding is present in:

  Variable region of light chain

 Variable region of both heavy and light chains

  Variable region of light chain

  Variable region of heavy chain

Question 19 of 20

20. Which of the following is not a lymphoid tissue?

  Tonsils

 Appendix

 Thymus

 Spleen

Question 20 of 20

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