Chapter 4 Biology And Human Welfare Immunity And Human Diseases Multiple Choice Questions
Question 1. The word ‘immunize’ means—
- Exempt
- Recovery
- Health
- Hygiene
Answer: 1. Exempt
Question 2. Who is known as the father of immunology?
- Louis Pasteur
- Edward Jenner
- Alexander Fleming
- Robert Koch
Answer: 2. Edward Jenner
Read and Learn More WBBSE Class 9 Life Science MCQs
WB Class 9 Life Science Question Answer
WBBSE Class 9 Immunity and Human Diseases MCQs
Question 3. Which of the following is not an immunological response?
- Formation of antibody in response to antigen
- Monocytes killing germs by phagocytosis
- Antibody formation by vaccination
- Killing germs by antibiotic
Answer: 4. Killing germs by antibiotic
Question 4. Which of the following is involved in immunity?
- Lymphocyte cells
- Plasma proteins
- Lymph and lymph gland
- All of these
Answer: 4. All of these
Question 5. Active immunity develops within the body by—
- The inflow of antibodies from the mother’s blood to fetal blood through placental circulation
- Blood transfusion.
- Primary infection of any antigenic pathogen
- 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—
- Innate immunity
- Active acquired immunity
- Passively acquired immunity
- None of these
Answer: 2. Active acquired immunity
Question 7. Passive immunity develops within the body by
- Direct injection of any attenuated germ
- The inflow of antibodies from mother to fetus through placental circulation
- Injection of a toxin, extracted from antigenic pathogen
- 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—
- Polysaccharide
- Lipoprotein
- Glycoprotein
- All of these
Answer: 2. Lipoprotein
Question 9. Which one of the following is not related to the phagocytosis process—
- Macrophages
- Lymphocytes
- Neutrophils
- Monocytes
Answer: 2. Lymphocytes
Question 10. Select the correct option from the following—
- An IgG molecule has two antigen binding sites and one heavy and one light chain
- IgG molecule is composed of two light and two heavy chains
- An antigen-binding site of IgG is made up of two light chains
- 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
Key MCQs on Immunity for Class 9 Life Science
Question 11. The main immunoglobulin present in blood plasma is—
- IgA
- IgG
- IgM
- IgD
Answer: 2. IgG
Question 12. The immunoglobulin, which reaches the body of neonates through colostrum is—
- IgA
- IgG
- IgM
- IgD
Answer: 1. IgA
Question 13. The cell-mediated response involves—
- Helper T cells
- Plasma Cells
- Antibodies
- None of these
Answer: 1. Helper T cells
Question 14. Cytotoxic T cells kill—
- Healthy body cells
- Infected body cells
- Macrophages
- All of these
Answer: 2. Infected body cells
Question 15. T cells mature in—
- Bone marrow
- Blood
- Thymus gland
- Kidney
Answer: 3. Thymus gland
Human Diseases MCQs for Class 9 Life Science
Question 16. Helper T cells activate—
- Phagocytic macrophage
- Killer T cells
- B cells
- 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—
- Antigen
- Antibody
- Interferon
- Toxin
Answer: 3. Interferon
Question 18. The humoral response is related to—
- Ts-cells
- Tc-cells
- Antibodies
- None of these
Answer: 3. Antibodies
Question 19. In B cells ‘B’ indicates—
- B blood group
- B agglutinogen
- Beta antibody
- Bursa Fabricius
Answer: 4. Bursa Fabricius
Question 20. Which cells produce specific antibodies to inactivate antigens?
- T lymphocytes
- RBC
- Plasma cells
- Macrophages
Answer: 3. Plasma cells
Question 21. The formation of antibodies depends directly upon the—
- Cytotoxic T cells
- Helper T cells
- Monocytes
- Plasma cells
Answer: 4. Plasma cells
Practice MCQs for Chapter 4: Immunity and Diseases
Question 22. Memory cells, involved in immune response are formed by—
- Neutrophils
- Basophils
- Monocytes
- Lymphocytes
Answer: 4. Lymphocytes
Question 23. Memory cells are stored in—
- Brain
- Liver
- Spleen
- Kidney
Answer: 3. Spleen
Question 24. Which of the following is present in the cell membrane of mast cells and B lymphocytes?
- IgE
- IgG
- IgM
- IgA
Answer: 1. IgE
Question 25. The names of Sara Nelmes and James Phipps are related to—
- Smallpox vaccine
- Chickenpox vaccine
- Cowpox vaccine
- Cholera vaccine
Answer: 1. Smallpox vaccine
Question 26. Effectiveness of a vaccine is retained within the body by?
- Helper T cells
- Macrophage cells
- Memory T and B cells
- 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—
- Diphtheria
- Smallpox
- Chickenpox
- Polio
Answer: 2. Smallpox
Question 28. Smallpox was declared officially as an eradicated disease by WHO in the year—
- 1977
- 1978
- 1796
- 1980
Answer: 4. 1980
Question 29. In attenuated vaccine—
- Dead germs are used
- Living but inactive germs are used
- Toxins from the germs are used
- A combination of bacteria and viruses is used
Answer: 2. Living but inactive germs are used
Important Concepts for MCQs on Immunity
Question 30. Killed germs are used to immunize against—
- Tetanus
- Plague
- Diphtheria
- All of these
Answer: 2. Plague
Question 31. DPT is a—
- Attenuated vaccine
- Inactive vaccine
- Toxoid
- Combination vaccine
Answer: 4. Combination vaccine
Question 32. BCG vaccine is applied to immunize babies against—
- Polio
- Whooping cough
- Tuberculosis
- Cholera
Answer: 3. Tuberculosis
Question 33. Orally administrate vaccine—
- Salic polio vaccine
- Sabin polio vaccine
- Cholera vaccine
- Rubella vaccine
Answer: 1. Salic polio vaccine
Question 34. Diarrhea may be caused by—
- Entamoeba
- Shigella
- Salmonella
- All of these
Answer: 4. All of these
Question 35. Which of the following diseases may be caused by protozoa, bacteria and even virus?
- Cholera
- Diphtheria
- Pneumonia
- Diarrhea
Answer: 4. Diarrhea
Sample MCQs from WBBSE Class 9 Life Science
Question 36. Prolonged diarrhea results into—
- Severe respiratory distress
- Dehydration of the body
- Very high fever
- Severe headache
Answer: 2. Dehydration of the body
Question 37. The organism acting as a vector for the diarrhea-causing pathogen is—
- House Fly
- Cockroach
- Both
- None of these
Answer: 1. House Fly
Question 38. Splenomegaly or enlargement of the spleen is a common symptom of—
- Tuberculosis
- Malaria
- Hepatitis B
- Dengue
Answer: 2. Malaria
Question 39. The feeling of extreme chill followed by a very high fever is the symptom of—
- Pneumonia
- Diphtheria
- Malaria
- Cholera
Answer: 3. Malaria
Question 40. Plasmodium, the pathogen of malaria is a type of—
- Bacteria
- Virus
- Fungus
- Protozoa
Answer: 4. Protozoa
Question 41. The vector of the malarial pathogen is—
- Female Anopheles mosquito
- Male Anopheles mosquito
- Female Culex mosquito
- Female Aedes mosquito
Answer: 1. Female Anopheles mosquito
Question 42. The vector of the dengue virus is—
- Female Anopheles mosquito
- Male Anopheles mosquito
- Female Culex mosquito
- Female Aedes mosquito
Answer: 4. Female Aedes mosquito
Chapter 4 Life Science Quiz Questions
Question 43. Soil dwelling bacterium that enters into the body through the wound is—
- Cory neb bacterium diphtheria
- Clostridium tetani
- Streptococcus pneumoniae
- All of these
Answer: 1. Cory neb bacterium diphtheria
Question 44. Inflammation of tonsil with layered white sheath indicates—
- Tuberculosis
- Pneumonia
- Diphtheria
- All of these
Answer: 3. Diphtheria
Question 45. Diphtheria is caused by—
- Mycobacterium
- Cory neb bacterium
- Streptococcus
- Plasmodium
Answer: 2. Cory neb bacterium
WB Class 9 Life Science Question Answer
Question 46. Respiratory droplets may cause infections like—
- Malaria, Cholera and Diarrhoea
- Diphtheria, Tuberculosis and Tetanus
- Tuberculosis, Diphtheria and Pneumonia
- Tuberculosis, Dengue and Diphtheria
Answer: 3. Tuberculosis, Diphtheria and Pneumonia
Question 47. Lock Jaw disease is caused by the infection of—
- Dengue virus-diphtheria
- Corynebacterium
- Mycobacterium tuberculosis
- Clostridium tetani
Answer: 4. Clostridium tetani
Question 48. Lungs are affected in—
- Tuberculosis and diarrhoea
- Pneumonia and tuberculosis
- Tuberculosis and dengue
- All of these
Answer: 2. Pneumonia and tuberculosis
Study Tips for Class 9 Immunity and Human Diseases MCQs
Question 49. Prolonged dry cough with quick loss of weight is a common indication of—
- Diphtheria
- Dengue
- Tuberculosis
- 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—
- Malaria
- chickenpox
- Pneumonia
- Dengue
Answer: 4. Dengue
Question 51. Transmission of which of the following diseases is caused by contaminated blood transfusion?
- Malaria, Tuberculosis and AIDS
- Malaria, Hepatitis B and AIDS
- Hepatitis A, Hepatitis B and AIDS
- 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?
- Diarrhea
- Diarrhea and Hepatitis A
- Hepatitis A and Hepatitis B
- 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?
- AIDS and Hepatitis B
- Hepatitis A and AIDS
- Tuberculosis and Hepatitis B
- 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?
- Hepatitis B, Hepatitis A, Dengue, and AIDS
- Dengue, Malaria and AIDS
- Tuberculosis and Pneumonia
- Hepatitis B, Hepatitis A, Tetanus, and AIDS
Answer: 2. Dengue, Malaria and AIDS
Question 55. Which cell of human body is damaged by HIV?
- Lymphocyte
- Eosinophil
- Macrophage
- Red blood cell
Answer: 1. Lymphocyte
Question 56. Which pathogen is not spread through blood?
- Hepatitis A
- Hepatitis B
- Malarial parasite
- HIV
Answer: 1. Hepatitis A
Question 57. The personal level of washing includes—
- Brushing teeth
- Bathing
- Cleaning hands before taking food
- All of these
Answer: 4. All of these
Question 58. Which is treated as the family level of washing?
- Bathing
- Cleaning toilet
- Cleaning hands
- All of these
Answer: 2. Cleaning toilet
Question 59. The social level of washing includes—
- Washing the door-step of your house
- Washing the water reservoir of your house
- Washing the toilets of rail station premises
- All of these
Answer: 3. Washing the toilets of rail station premises
Question 60. A disinfectant used for personal washing is—
- Bleaching powder
- Phenyl
- Hand sanitizer
- None of these
Answer: 3. Hand sanitizer
Question 61. A common but very effective disinfectant for cut wounds is—
- Soap
- Ethyl alcohol
- Methyl alcohol
- 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—
- Eggs of parasitic worms
- Remnants of pesticides
- Dirt and mud
- 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? .
- UNICEF
- UNO
- WHO
- None of these
Answer: 1. UNICEF