Biology chapter 20 Man and biology

1. A phenomenon, which is used for the transfer of genes from one organism to another, is called:

(a) Genetic Engineering✅

(b) Genetics

(c) (a) and (b)

(d) None

2. Vector used for the transfer of gene is usually:

(a) Plasmids✅

(b) Viral DNA

(c) Bacterial DNA

(d) All

3. Diseases caused by bacteria are:

(a) Polio and T.B

(b) Cholera and measles

(c) AIDS and Dysentery

(d) T.B and Cholera✅

4. Recycling of material is great advantage because it:

(a) Reduces waste disposal

(b) Reduces pollution

(c) Saves energy and money

(d) All above✅

5. Man brings undesirable changes in the environment and pollutes:

(a) The air

(b) The water

(c) The soil

(d) All above✅

6. The use of micro-organisms to make useful substances for man is called:

(a) Biology

(b) Genetics

(c) Biotechnology✅

(d) Genetic engineering

7. Micro-organisms include:

(a) Bacteria

(b) Fungi

(c) Viruses

(d) All above✅

8. The materials that can be split into simpler compounds are called:

(a) Biodegradable✅

(b) Decomposed

(c) Non-biodegradable

(d) (a) and (b)

9. Which of the following is recycled in nature:

(a) Carbon

(b) Oxygen

(c) Water

(d) All above✅

10. Pests can be controlled:

(a) Biologically

(b) Chemically

(c) Mechanically

(d) All above✅

11. Bringing of undesirable changes in the environment is called:

(a) Harsh changes

(b) Bad changes

(c) Pollution✅

(d) All above

12. Which of the following do forests supply:

(a) Oxygen

(b) Fruits

(c) Timber and medicine

(d) All above✅

13. Yeast ferments sugar into:

(a) Glucose

(b) Alcohol✅

(c) Spirite

(d) None

14. Dough flour rises due to:

(a) CO₂✅

(b) O₂

(c) Nitrogen

(d) None

15. Which of the following is a decomposer:

(a) Fungi

(b) Bacteria

(c) Both (a) and (b)✅

(d) All above

16. Which of the following are viral diseases?

(a) T.B and cholera

(b) T.B. and polio

(c) Measles and polio✅

(d) AIDS and T.B

17. AIDS is transmitted through:

(a) Sexual contact

(b) Syringes

(c) Blood transfusion

(d) All above✅

18. AIDS is caused by:

(a) HIV virus✅

(b) HBV virus

(c) HCV virus

(d) Picorno virus

19. Athlete's foot disease is caused by:

(a) Fungi✅

(b) Algae

(c) Bacteria

(d) Virus

20. Ringworm is caused by:

(a) Virus

(b) Bacteria

(c) Fungi✅

(d) Algae

➡ Next MCQs Page