Chapter 4 Biology And Human Welfare MCQs
Question 1. Which one of the following help in increase the yield of rice-T
(1) Pseudomonas
(2) Azotobactor
(3) Spirulina
(4) Azolla
Answer: (4) Azolla.
Question 2. Which one is a symbiotic bacteria ?
(1) Clostridium
(2) Chlorobium
(3) Chromatium
(4) Rhizobium
Answer: (4) Rhizobium
Question 3. The algae spirulina is-
(1) Biofertiliser
(2) Single cell protein
(3) Antibiotic
(4) Biopesticide
Answer: (3) Antibiotic.
Question 4. Microbes are very useful in the production of-
(1) Vaccine
(2) Antibiotic
(3) Fuel
(4) All the above
Answer: (4) All the above.
Question 5. Which one of the following is not a biofertilizer?
(1) Agrobacterium
(2) Rhizobium
(3) Nostoc
(4) Mycorrh
Answer: (3) Nostoc.
Question 6. The pathogen of malaria is-
(1) Bacteria
(2) Virus
(3) Protozoa
(4) Nematodes
Answer: (3) Protozoa.
Question 7. BCG is a vaccine used for the disease-
(1) Malaria
(2) Tuberculosis
(3) Pneumonia
(4) Cholera
Answer: (2) Tuberculosis.
Question 8. WASH programme was launched by –
(1) UNESCO
(2) Russia
(3) IUCN
(4) UNICEF
Answer: (4) UNICEF.
Question 9. WBC cell associated with immunity is-
(1) Neutrophil
(2) Eosinophil
(3) Basophil
(4) Monocyte
Answer: (1) Neutrophil.
Question 10. Antibodies are-
(1) Carbohydrate
(2) Protein
(3) Lipid
(4) Vitamins
Answer: (2) Protein.
Question 11. The process of developing immunity against infection is called-
(1) Immunization
(2) Vaccination
(3) Sanitation
(4) Toxication
Answer: (1) Immunization.
Question 12. A sexually transmitted disease is –
(1) Malaria
(2) Dengue
(3) AIDS
(4) Filaria
Answer: (3) AIDS.
Question 13. This germ causes serious diarrhoea in human. It is –
(1) Salmonella
(2) Mycobacterium
(3) Agaricus
(4) Corynebacterium
Answer: (1) Salmonella
Question 14. This virus infects through blood transfusion. This is –
(1) Hepatitis A virus
(2) Hepatitis B virus
(3) Influenza virus
(4) None
Answer: (2) Hepatitis B virus
Question 15. Flavivirus causes-
(a) Hepatitis
(b) AIDS
(c) Dengue
(d) Influenza
Answer: (3) Dengue
Question 16. Cause of tuberculosis is a-
(1) Virus
(2) Protozoa
(3) Bacteria
(4) Fungi
Answer: (3) Bacteria
Question 17. Retroviruses cause a disease. This is known as –
(1) Autoimmune disease
(2) Immune deficiency disease
(3) Hepatitis B
(4) Hepatitis A
Answer: (2) Immune deficiency disease
Question 18. Mycorrhiza is an association of-
(1 Bacteria and virus
(2) Algae and fungi
(3) Fungi and root of plants
(4) Fungi and gymnosperms
Answer: (3) Fungi and root of plants
Question 19. Which of the following is not a type of immunoglobulin?
(1) IgG
(2) IgE
(3) IgA
(4) IgS
Answer: (4) IgS
Question 20. The foreign substances which on entering our body activate the body’s immune system are-
(1) Antibodies
(2) Antigens
(3) Immunoglobulins
(4) Lymphocytes
Answer: (2) Antigens
Question 21. Which of the following vaccines contain killed pathogens?
(1) Killed vaccine
(2) Toxoid vaccine
(3) Attenuated vaccine
(4) Conjugate vaccine
Answer: (1) Killed vaccine
Question 22. Which of the following is not a type of T-cell?
(1) Cytotoxic T-cell (T, cell)
(2) Helper T-cell (T,, cell)
(3) Suppresor T-cell (T, cell)
(4) Plasma T-cell (T, cell).
Answer: (4) Plasma T-cell (T, cell)
Question 23. Which of the following is a fungus acting as bio-control agent?
(1) Bacillus thuringiensis
(2) Caudovirales
(3) Nosema locustae
(4) Beauveria bassiana
Answer: (4) Beauveria bassiana
Question 24. Tetanus is caused by-
(1) Bacteria
(2) Virus
(3) Protozoa
(4) Fungi
Answer: (1) Bacteria
Question 25. Causative agent of diphtheria is –
(1) Clostridium tetani
(2) Streptococcus pneumoniae
(3) Mycobacterium tuberculosis
(4) Cornybacterium diphtheriae
Answer: (4) Cornybacterium diphtheriae
Question 26. Yellowing of skin and eye is a symptom of –
(1) Pneumonia
(2) Tetanus
(3) Hepatitis
(4) AIDS
Answer: (3) Hepatitis
Question 27. Dengue is caused by-
(1) Plasmodium vivax
(2) Plasmodium malariae
(3) Flavivirus
(4) Plasmodium falciparum
Answer: (3) Flavivirus
Question 28. Which of the following is an anaerobic nitrogen fixing bacteria, actin as biofertilizer?
(1) Azotobacter
(2) Clostridium
(3) Derxia
(4) Rhizobium
Answer: (1) Azotobacter
Question 29. Fungi involved in formation of mycorrhiza is-
(1) Agaricus
(2) Amanita
(3) Saccharomyces
(4) Ascobolus
Answer: (2) Amanita
