Question Paper
Class / Subject: Class 8 (CBSE) · Science
Chapter: Chapter 2 — Chapter 2: The Invisible Living World: Beyond Our Naked Eye
Time Allowed: 15 minutes
Max Marks: 6
1. An organism too small to see without a microscope is called a: [1]
(A) microorganism
(B) mammal
(C) reptile
(D) amphibian
2. Which group of microorganisms needs a living host cell to reproduce? [1]
(A) Viruses
(B) Bacteria
(C) Fungi
(D) Protozoa
3. Yeast, used in bread-making, belongs to the group: [1]
(A) Fungi
(B) Bacteria
(C) Viruses
(D) Protozoa
4. The bacteria that helps make curd is: [1]
(A) Lactobacillus
(B) Salmonella
(C) Vibrio
(D) Streptococcus
5. Antibiotics were discovered by: [1]
(A) Alexander Fleming
(B) Louis Pasteur
(C) Edward Jenner
(D) Robert Koch
6. Which method helps preserve food by slowing microorganism growth? [1]
(A) Refrigeration
(B) Leaving it in open air
(C) Exposing to sunlight only
(D) Adding more water