Question Paper
Class / Subject: Class 9 (SSC) · Science and Technology (विज्ञान आणि तंत्रज्ञान)
Chapter: Chapter 8 — Chapter 8: Useful and Harmful Microbes
Time Allowed: 32 minutes
Max Marks: 16
1. What is an example of a beneficial microbe use? [1]
(A) Yeast for bread-making
(B) Only causing disease
(C) No beneficial uses exist
(D) Only food spoilage
2. What microbes are used for yoghurt? [1]
(A) Bacteria
(B) Only viruses
(C) Only fungi always
(D) No microbes are used
3. What antibiotic comes from a fungus? [1]
(A) Penicillin
(B) Insulin
(C) Vaccine serum
(D) Vitamin C
4. What do harmful microbes cause? [1]
(A) Diseases in humans, animals, plants
(B) Only beneficial effects
(C) Nothing significant
(D) Only food preservation
5. How do harmful microbes spread? [1]
(A) Through various means like air, water, contact
(B) They never spread
(C) Only through sunlight
(D) Only through metal
6. Why understand both types of microbes? [1]
(A) To harness benefits and prevent harm
(B) No reason
(C) It's not useful
(D) Only for decoration
7. What field uses microbes for medical applications? [1]
(A) Biotechnology
(B) Only agriculture
(C) Only mining
(D) Only construction
8. Why learn about useful and harmful microbes? [1]
(A) To understand their dual role in our lives
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is an example of a beneficial microbe use? [1]
(A) Yeast for bread-making
(B) Only causing disease
(C) No beneficial uses exist
(D) Only food spoilage
10. What microbes are used for yoghurt? [1]
(A) Bacteria
(B) Only viruses
(C) Only fungi always
(D) No microbes are used
11. What antibiotic comes from a fungus? [1]
(A) Penicillin
(B) Insulin
(C) Vaccine serum
(D) Vitamin C
12. What do harmful microbes cause? [1]
(A) Diseases in humans, animals, plants
(B) Only beneficial effects
(C) Nothing significant
(D) Only food preservation
13. How do harmful microbes spread? [1]
(A) Through various means like air, water, contact
(B) They never spread
(C) Only through sunlight
(D) Only through metal
14. Why understand both types of microbes? [1]
(A) To harness benefits and prevent harm
(B) No reason
(C) It's not useful
(D) Only for decoration
15. What field uses microbes for medical applications? [1]
(A) Biotechnology
(B) Only agriculture
(C) Only mining
(D) Only construction
16. Why learn about useful and harmful microbes? [1]
(A) To understand their dual role in our lives
(B) No reason
(C) It's not useful
(D) Only for tests