WBBSE Class 9 Life Science And Environment Chapter 4 Immunity And Human Diseases Multiple Choice Questions

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Chapter 4 Biology And Human Welfare Immunity And Human Diseases Multiple Choice Questions

Question 1. The word ‘immunize’ means—

  1. Exempt
  2. Recovery
  3. Health
  4. Hygiene

Answer: 1. Exempt

Question 2. Who is known as the father of immunology?

  1. Louis Pasteur
  2. Edward Jenner
  3. Alexander Fleming
  4. Robert Koch

Answer: 2. Edward Jenner

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WB Class 9 Life Science Question Answer

Question 3. Which of the following is not an immunological response?

  1. Formation of antibody in response to antigen
  2. Monocytes killing germs by phagocytosis
  3. Antibody formation by vaccination
  4. Killing germs by antibiotic

Answer: 4. Killing germs by antibiotic

Question 4. Which of the following is involved in immunity?

  1. Lymphocyte cells
  2. Plasma proteins
  3. Lymph and lymph gland
  4. All of these

Answer: 4. All of these

Question 5. Active immunity develops within the body by—

  1. The inflow of antibodies from the mother’s blood to fetal blood through placental circulation
  2. Blood transfusion.
  3. Primary infection of any antigenic pathogen
  4. Direct injection of antibodies into the body

Answer: 3. Primary infection of any antigenic pathogen

Question 6. Immunity against chicken pox that is developed by a person after the first infection from the same disease is—

  1. Innate immunity
  2. Active acquired immunity
  3. Passively acquired immunity
  4. None of these

Answer: 2. Active acquired immunity

Question 7. Passive immunity develops within the body by

  1. Direct injection of any attenuated germ
  2. The inflow of antibodies from mother to fetus through placental circulation
  3. Injection of a toxin, extracted from antigenic pathogen
  4. None of these

Answer: 2. The inflow of antibodies from mother to fetus through placental circulation

WB Class 9 Life Science Question Answer

Question 8. Chemically antigen is a—

  1. Polysaccharide
  2. Lipoprotein
  3. Glycoprotein
  4. All of these

Answer: 2. Lipoprotein

Question 9. Which one of the following is not related to the phagocytosis process—

  1. Macrophages
  2. Lymphocytes
  3. Neutrophils
  4. Monocytes

Answer: 2. Lymphocytes

Question 10. Select the correct option from the following—

  1. An IgG molecule has two antigen binding sites and one heavy and one light chain
  2. IgG molecule is composed of two light and two heavy chains
  3. An antigen-binding site of IgG is made up of two light chains
  4. An antigen-binding site of IgG is composed of two heavy chains

Answer: 2. IgG molecule is composed of two light and two heavy chains

WBBSE Class 9 Life Science And Environment Chapter 4 Immunity And Human Diseases Multiple Choice Questions

Question 11. The main immunoglobulin present in blood plasma is—

  1. IgA
  2. IgG
  3. IgM
  4. IgD

Answer: 2. IgG

Question 12. The immunoglobulin, which reaches the body of neonates through colostrum is—

  1. IgA
  2. IgG
  3. IgM
  4. IgD

Answer: 1. IgA

Question 13. The cell-mediated response involves—

  1. Helper T cells
  2. Plasma Cells
  3. Antibodies
  4. None of these

Answer: 1. Helper T cells

Question 14. Cytotoxic T cells kill—

  1. Healthy body cells
  2. Infected body cells
  3. Macrophages
  4. All of these

Answer: 2. Infected body cells

Question 15. T cells mature in—

  1. Bone marrow
  2. Blood
  3. Thymus gland
  4. Kidney

Answer: 3. Thymus gland

Question 16. Helper T cells activate—

  1. Phagocytic macrophage
  2. Killer T cells
  3. B cells
  4. Both 2 and 3

Answer: 4. Both 2 and 3

WB Class 9 Life Science Question Answer

Question 17. An antiviral substance produced within a virus-infected cell to prevent the proliferation and spreading of virus is—

  1. Antigen
  2. Antibody
  3. Interferon
  4. Toxin

Answer: 3. Interferon

Question 18. The humoral response is related to—

  1. Ts-cells
  2. Tc-cells
  3. Antibodies
  4. None of these

Answer: 3. Antibodies

Question 19. In B cells ‘B’ indicates—

  1. B blood group
  2. B agglutinogen
  3. Beta antibody
  4. Bursa Fabricius

Answer: 4. Bursa Fabricius

Question 20. Which cells produce specific antibodies to inactivate antigens?

  1. T lymphocytes
  2. RBC
  3. Plasma cells
  4. Macrophages

Answer: 3. Plasma cells

Question 21. The formation of antibodies depends directly upon the—

  1. Cytotoxic T cells
  2. Helper T cells
  3. Monocytes
  4. Plasma cells

Answer: 4. Plasma cells

Question 22. Memory cells, involved in immune response are formed by—

  1. Neutrophils
  2. Basophils
  3. Monocytes
  4. Lymphocytes

Answer: 4. Lymphocytes

Question 23. Memory cells are stored in—

  1. Brain
  2. Liver
  3. Spleen
  4. Kidney

Answer: 3. Spleen

Question 24. Which of the following is present in the cell membrane of mast cells and B lymphocytes?

  1. IgE
  2. IgG
  3. IgM
  4. IgA

Answer: 1. IgE

Question 25. The names of Sara Nelmes and James Phipps are related to—

  1. Smallpox vaccine
  2. Chickenpox vaccine
  3. Cowpox vaccine
  4. Cholera vaccine

Answer: 1. Smallpox vaccine

Question 26. Effectiveness of a vaccine is retained within the body by?

  1. Helper T cells
  2. Macrophage cells
  3. Memory T and B cells
  4. All lymphocytes

Answer: 3. Memory T and B cells

WB Class 9 Life Science Question Answer

Question 27. A disease, that has been completely eradicated by vaccination is—

  1. Diphtheria
  2. Smallpox
  3. Chickenpox
  4. Polio

Answer: 2. Smallpox

Question 28. Smallpox was declared officially as an eradicated disease by WHO in the year—

  1. 1977
  2. 1978
  3. 1796
  4. 1980

Answer: 4. 1980

Question 29. In attenuated vaccine—

  1. Dead germs are used
  2. Living but inactive germs are used
  3. Toxins from the germs are used
  4. A combination of bacteria and viruses is used

Answer: 2. Living but inactive germs are used

Question 30. Killed germs are used to immunize against—

  1. Tetanus
  2. Plague
  3. Diphtheria
  4. All of these

Answer: 2. Plague

Question 31. DPT is a—

  1. Attenuated vaccine
  2. Inactive vaccine
  3. Toxoid
  4. Combination vaccine

Answer: 4. Combination vaccine

Question 32. BCG vaccine is applied to immunize babies against—

  1. Polio
  2. Whooping cough
  3. Tuberculosis
  4. Cholera

Answer: 3. Tuberculosis

Question 33. Orally administrate vaccine—

  1. Salic polio vaccine
  2. Sabin polio vaccine
  3. Cholera vaccine
  4. Rubella vaccine

Answer: 1. Salic polio vaccine

Question 34. Diarrhea may be caused by—

  1. Entamoeba
  2. Shigella
  3. Salmonella
  4. All of these

Answer: 4. All of these

Question 35. Which of the following diseases may be caused by protozoa, bacteria and even virus?

  1. Cholera
  2. Diphtheria
  3. Pneumonia
  4. Diarrhea

Answer: 4. Diarrhea

Question 36. Prolonged diarrhea results into—

  1. Severe respiratory distress
  2. Dehydration of the body
  3. Very high fever
  4. Severe headache

Answer: 2. Dehydration of the body

Question 37. The organism acting as a vector for the diarrhea-causing pathogen is—

  1. House Fly
  2. Cockroach
  3. Both
  4. None of these

Answer: 1. House Fly

Question 38. Splenomegaly or enlargement of the spleen is a common symptom of—

  1. Tuberculosis
  2. Malaria
  3. Hepatitis B
  4. Dengue

Answer: 2. Malaria

Question 39. The feeling of extreme chill followed by a very high fever is the symptom of—

  1. Pneumonia
  2. Diphtheria
  3. Malaria
  4. Cholera

Answer: 3. Malaria

Question 40. Plasmodium, the pathogen of malaria is a type of—

  1. Bacteria
  2. Virus
  3. Fungus
  4. Protozoa

Answer: 4. Protozoa

Question 41. The vector of the malarial pathogen is—

  1. Female Anopheles mosquito
  2. Male Anopheles mosquito
  3. Female Culex mosquito
  4. Female Aedes mosquito

Answer: 1. Female Anopheles mosquito

Question 42. The vector of the dengue virus is—

  1. Female Anopheles mosquito
  2. Male Anopheles mosquito
  3. Female Culex mosquito
  4. Female Aedes mosquito

Answer: 4. Female Aedes mosquito

Question 43. Soil dwelling bacterium that enters into the body through the wound is—

  1. Cory neb bacterium diphtheria
  2. Clostridium tetani
  3. Streptococcus pneumoniae
  4. All of these

Answer: 1. Cory neb bacterium diphtheria

Question 44. Inflammation of tonsil with layered white sheath indicates—

  1. Tuberculosis
  2. Pneumonia
  3. Diphtheria
  4. All of these

Answer: 3. Diphtheria

Question 45. Diphtheria is caused by—

  1. Mycobacterium
  2. Cory neb bacterium
  3. Streptococcus
  4. Plasmodium

Answer: 2. Cory neb bacterium

WB Class 9 Life Science Question Answer

Question 46. Respiratory droplets may cause infections like—

  1. Malaria, Cholera and Diarrhoea
  2. Diphtheria, Tuberculosis and Tetanus
  3. Tuberculosis, Diphtheria and Pneumonia
  4. Tuberculosis, Dengue and Diphtheria

Answer: 3. Tuberculosis, Diphtheria and Pneumonia

Question 47. Lock Jaw disease is caused by the infection of—

  1. Dengue virus-diphtheria
  2. Corynebacterium
  3. Mycobacterium tuberculosis
  4. Clostridium tetani

Answer: 4. Clostridium tetani

Question 48. Lungs are affected in—

  1. Tuberculosis and diarrhoea
  2. Pneumonia and tuberculosis
  3. Tuberculosis and dengue
  4. All of these

Answer: 2. Pneumonia and tuberculosis

Question 49. Prolonged dry cough with quick loss of weight is a common indication of—

  1. Diphtheria
  2. Dengue
  3. Tuberculosis
  4. Pneumonia

Answer: 3. Tuberculosis

Question 50. Severe joint pain with high fever and occasional rash on the back and shoulder are the common symptoms of—

  1. Malaria
  2. chickenpox
  3. Pneumonia
  4. Dengue

Answer: 4. Dengue

Question 51. Transmission of which of the following diseases is caused by contaminated blood transfusion?

  1. Malaria, Tuberculosis and AIDS
  2. Malaria, Hepatitis B and AIDS
  3. Hepatitis A, Hepatitis B and AIDS
  4. AIDS only

Answer: 2. Malaria, Hepatitis B and AIDS

Question 52. Transmission of which of the following diseases are caused by contaminated food and water?

  1. Diarrhea
  2. Diarrhea and Hepatitis A
  3. Hepatitis A and Hepatitis B
  4. Hepatitis B only

Answer: 2. Diarrhea and Hepatitis A

WB Class 9 Life Science Question Answer

Question 53. Which of these diseases may be transmitted sexually?

  1. AIDS and Hepatitis B
  2. Hepatitis A and AIDS
  3. Tuberculosis and Hepatitis B
  4. Hepatitis B, Hepatitis A and AIDS

Answer: 1. AIDS and Hepatitis B

Question 54. Which of the following set of diseases are of viral origin?

  1. Hepatitis B, Hepatitis A, Dengue, and AIDS
  2. Dengue, Malaria and AIDS
  3. Tuberculosis and Pneumonia
  4. Hepatitis B, Hepatitis A, Tetanus, and AIDS

Answer: 2. Dengue, Malaria and AIDS

Question 55. Which cell of human body is damaged by HIV?

  1. Lymphocyte
  2. Eosinophil
  3. Macrophage
  4. Red blood cell

Answer: 1. Lymphocyte

Question 56. Which pathogen is not spread through blood?

  1. Hepatitis A
  2. Hepatitis B
  3. Malarial parasite
  4. HIV

Answer: 1. Hepatitis A

Question 57. The personal level of washing includes—

  1. Brushing teeth
  2. Bathing
  3. Cleaning hands before taking food
  4. All of these

Answer: 4. All of these

Question 58. Which is treated as the family level of washing?

  1. Bathing
  2. Cleaning toilet
  3. Cleaning hands
  4. All of these

Answer: 2. Cleaning toilet

Question 59. The social level of washing includes—

  1. Washing the door-step of your house
  2. Washing the water reservoir of your house
  3. Washing the toilets of rail station premises
  4. All of these

Answer: 3. Washing the toilets of rail station premises

Question 60. A disinfectant used for personal washing is—

  1. Bleaching powder
  2. Phenyl
  3. Hand sanitizer
  4. None of these

Answer: 3. Hand sanitizer

Question 61. A common but very effective disinfectant for cut wounds is—

  1. Soap
  2. Ethyl alcohol
  3. Methyl alcohol
  4. All of these

Answer: 4. All of these

Question 62. Consuming a ripe tomato by plucking it directly from the plant of a field is harmful, as it may carry—

  1. Eggs of parasitic worms
  2. Remnants of pesticides
  3. Dirt and mud
  4. All of these

Answer: 3. All of these

Question 63. Which organization has developed a global strategy to lift the standard of health of school children? .

  1. UNICEF
  2. UNO
  3. WHO
  4. None of these

Answer: 1. UNICEF

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