Question Paper
Class / Subject: Class 9 (ICSE) · Biology
Chapter: Chapter 9 — Chapter 9: Economic Importance of Bacteria and Fungi
Time Allowed: 32 minutes
Max Marks: 16
1. What do bacteria help decompose? [1]
(A) Organic matter
(B) Only rocks
(C) Only metal
(D) Nothing
2. What do bacteria help recycle? [1]
(A) Nutrients in ecosystems
(B) Only water
(C) Only air
(D) Nothing
3. What food products use bacteria? [1]
(A) Yogurt and cheese
(B) Only bread
(C) Only fruits
(D) Nothing
4. What do nitrogen-fixing bacteria do? [1]
(A) Make nitrogen available for plants
(B) Remove nitrogen from soil
(C) Nothing useful
(D) Only harm plants
5. What fungus is used in baking? [1]
(A) Yeast
(B) Penicillium
(C) Mushrooms only
(D) Mould only
6. What does Penicillium produce? [1]
(A) Antibiotics
(B) Only bread
(C) Only cheese
(D) Nothing useful
7. Are bacteria and fungi only harmful? [1]
(A) No, they have many beneficial roles
(B) Yes, always harmful
(C) They have no roles at all
(D) Only bacteria are beneficial
8. Why study the economic importance of bacteria and fungi? [1]
(A) To appreciate their essential beneficial roles
(B) No reason
(C) It's not useful
(D) Only for tests
9. What do bacteria help decompose? [1]
(A) Organic matter
(B) Only rocks
(C) Only metal
(D) Nothing
10. What do bacteria help recycle? [1]
(A) Nutrients in ecosystems
(B) Only water
(C) Only air
(D) Nothing
11. What food products use bacteria? [1]
(A) Yogurt and cheese
(B) Only bread
(C) Only fruits
(D) Nothing
12. What do nitrogen-fixing bacteria do? [1]
(A) Make nitrogen available for plants
(B) Remove nitrogen from soil
(C) Nothing useful
(D) Only harm plants
13. What fungus is used in baking? [1]
(A) Yeast
(B) Penicillium
(C) Mushrooms only
(D) Mould only
14. What does Penicillium produce? [1]
(A) Antibiotics
(B) Only bread
(C) Only cheese
(D) Nothing useful
15. Are bacteria and fungi only harmful? [1]
(A) No, they have many beneficial roles
(B) Yes, always harmful
(C) They have no roles at all
(D) Only bacteria are beneficial
16. Why study the economic importance of bacteria and fungi? [1]
(A) To appreciate their essential beneficial roles
(B) No reason
(C) It's not useful
(D) Only for tests