MCQ Class 12 Biology Chapter 7 Human Health and Disease

MCQ’s For All Chapters – Biology Class 12th

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

Your comments:

Question 1 of 20

2. Anti venom against snake poison contains:

Antigens

Enzymes

Antigen-antibody complexes

Antibodies

Your comments:

Question 2 of 20

3. Formation of antibodies within our body is called:

Innate immunity

Acquired immunity

Passive immunity

Active immunity

Your comments:

Question 3 of 20

4. Antibodies are produced by:

T-cells

B-cells

Monocytes

Phagocytes

Your comments:

Question 4 of 20

5. Japanese encephalitis is transmitted by

Tse tse fly

Sand fly

Housefly

Mosquito

Your comments:

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

Your comments:

Question 6 of 20

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

Worms

Pathogens

Vectors

Insects

Your comments:

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

Your comments:

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

Your comments:

Question 9 of 20

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

Chondrocyte

Erythrocyte

Lymphocyte

Parasite

Your comments:

Question 10 of 20

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

Congenital diseases

Viral diseases

Bacterial diseases

Pollution-related diseases

Your comments:

Question 11 of 20

12. Immuno-deficiency syndrome could develop due to

Defective liver

AIDS virus

Defective thymus

Weak immune system

Your comments:

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

Your comments:

Question 13 of 20

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

ESR-Test

PCR-Test

Widal-Test

ELISA-Test

Your comments:

Question 14 of 20

15. The disease chikunguniya is transmitted by

Cockroach

Aedes mosquitoes

House flies

Female Anopheles

Your comments:

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

Your comments:

Question 16 of 20

17. Which immunoglobulin is largest in size?

Ig D

Ig A

Ig E

Ig M

Your comments:

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

Your comments:

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

Your comments:

Question 19 of 20

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

Tonsils

Appendix

Thymus

Spleen

Your comments:

Question 20 of 20

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