MCQ Why Do We Fall Ill? | NCERT Class 9 Science

#1. Which disease is not transmitted by mosquitoes?

a) Malaria

b) Brain fever or encephailitis

c) Dengue

d) Pneumonia

#2. Which one of the following disease is not caused by bacteria?

a) Malaria

b) Anthrax

c) Typhoid

d) Tuberculosis

#3. Viruses, which cause hepatitis, are not transmitted through

a) water

b) air

c) personal contact

d) food

#4. Mosquito breeds in

a) river

b) stagnant/standing water

c) flowers

d) leaves

#5. Which one of the following has a long-term effect on the health of an individual?

a) Common cold

b) Stress

c) Chicken pox

d) Chewing tobacco

#6. Vectors can be defined as

a) micro-organisms which cause many diseases

b) diseased plants

c) infected persons

d) animals carry infecting agents from sick person to another healthy person

#7. Which one of the following disease is caused by protozoans?

a) Cholera

b) Influenza

c) Malaria

d) AIDS

#8. Why making anti-viral drugs is more difficult than making anti-bacterial drugs

a) viruses have protein coat

b) viruses make use of host machinery

c) viruses are on the border line of living & non-living

d) viruses have very few biochemical mechanisms

#9. Which one of the following is not a viral disease?

a) AIDS

b) Dengue

c) Influenza

d) Typhoid

#10. AIDS is not transmitted by

a) breast-feeding

b) blood transfusion

c) hugs

d) sexual contact

#11. Mosquito is not responsible for

a) Brain fever

b) Malaria

c) Typhoid

d) Dengue

#12. Which is wrong statement?

a) Acne is not caused by staphylococci

b) Peptic ulcers are caused by eating acidic food

c) Cancers can be caused by genetic abnormalities

d) High blood pressure is caused by excessive weight & lack of exercises

#13. If you live in overcrowded & poorly ventilated house, it is possible that you may suffer from which of the following diseases?

a) cancer

b) AIDS

c) air borne diseases

d) cholera

#14. Which one of the following causes kala-azar?

a) Ascaris

b) Bacteria

c) Trypanosoma

d) Leishmania

#15. Which one of the following is not a bacterial disease?

a) Influenza

b) Cholera

c) Tuberculosis

d) Anthrax

#16. We should not allow mosquitoes to breed in our surroundings because they

a) multiply very fast & cause pollution

b) are vectors for many diseases

c) bite & cause skin diseases

d) are not important insects

#17. Children are vaccinated for Polio because

a) it creates immunity in the body

b) prevents the entry of polio causing organism

c) vaccination kills the polio causing microorganisms

d) all of the above

#18. Which one of the following is not important for individual health?

a) living in clean space

b) good economic condition

c) social equality & harmony

d) living in a large & well-furnished house

#19. Which of the following can you make ill if you come in contact with an infected person?

a) High blood pressure

b) Sneezing

c) Blood cancer

d) Genetic abnormalities

Finish

Results

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29	30

MCQ & Online Test – Why Do We Fall Ill? – NCERT Class 9 Science Chapter 13

Online Test | MCQ Why Do We Fall Ill? | NCERT Class 9 Science Chapter 13 | CBSE Syllabus