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Class 8 Science — Chapter 2: Microorganisms: Friend and Foe
6 practice questions · 2 Easy · 2 Medium · 2 Hard
Free NCERT-aligned multiple-choice practice for Class 8 Science, Chapter 2 (Microorganisms: Friend and Foe). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 6.
Sample questions
Q1Easy
Yeast used in baking is a:
A.Fungus✓ correct
B.Bacterium
C.Virus
D.Alga
Why
Saccharomyces cerevisiae.
Q2Medium
Antibiotics are produced from:
A.Microorganisms (e.g., fungi, bacteria)✓ correct
B.Plants only
C.Minerals
D.Synthetic only
Why
Penicillin from Penicillium.
Q3Hard
Nitrogen-fixing bacteria in legume roots:
A.Rhizobium✓ correct
B.E. coli
C.Streptococcus
D.Yeast
Why
Symbiotic with leguminous plants.
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