Q76. Match the scientist from Group I with the corresponding contribution listed in Group II
| Group I | Group II |
|---|---|
| P. Robert Koch Q. Walter Hesse R. Louis Pasteur S. Ferdinand Cohn |
1. Discovery of endospores 2. Disproved spontaneous generation 3. Discovery of causative agent of tuberculosis 4. Use of agar as solid media 5. Invention of microscope |
- P-5, Q-3, R-4, S-2
- P-3, Q-4, R-2, S-5
- P-3, Q-4, R-1, S-5
- P-3, Q-4, R-2, S-1
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Microbiology history questions like Q76 test your grasp of key scientists and their breakthroughs. This matching pairs Group I scientists with Group II contributions—perfect for exams like NEET, CSIR NET, or GATE life sciences. Let’s break it down with the correct answer first, then explain every option.
Correct Answer
P-3, Q-4, R-2, S-1
This matches perfectly with historical facts:
Group I Matches Group II Contribution P. Robert Koch 3 Discovery of causative agent of tuberculosis Q. Walter Hesse 4 Use of agar as solid media R. Louis Pasteur 2 Disproved spontaneous generation S. Ferdinand Cohn 1 Discovery of endospores Quick Explanations of Matches
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P. Robert Koch → 3: Koch identified Mycobacterium tuberculosis in 1882 using his postulates, revolutionizing germ theory.
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Q. Walter Hesse → 4: Hesse introduced agar (from his wife Fanny’s jellies) in 1881 for solid media, enabling bacterial isolation.
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R. Louis Pasteur → 2: Pasteur’s swan-neck flask experiments in 1861 showed microbes come from air, not spontaneous generation.
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S. Ferdinand Cohn → 1: Cohn discovered bacterial endospores in Bacillus species in 1875–1876, explaining heat resistance.
Why Other Options Are Wrong
Each incorrect choice swaps one or more matches. Here’s the breakdown:
Option 1: P-5, Q-3, R-4, S-2
Wrong across the board.-
P-5: Koch didn’t invent the microscope (Antonie van Leeuwenhoek did ~1670s).
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Q-3: Hesse worked with Koch but didn’t discover TB’s agent.
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R-4: Pasteur focused on vaccines/fermentation, not agar.
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S-2: Cohn studied algae/bacteria but Pasteur disproved spontaneous generation.
Option 2: P-3, Q-4, R-2, S-5
Close, but S-5 fails.-
S-5: Cohn didn’t invent the microscope—his work built on it for bacteriology.
Option 3: P-3, Q-4, R-1, S-5
Two errors.-
R-1: Pasteur didn’t discover endospores (that’s Cohn).
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S-5: Microscope invention mismatch again.
Option 4: P-3, Q-4, R-2, S-1
✅ Correct (as detailed above).Pro Tip for Exams
Memorize via timelines: Cohn (1870s endospores) → Hesse (1881 agar) → Koch (1882 TB) → Pasteur (ongoing germ theory). Practice similar matchings on spontaneous generation vs. biogenesis debates.
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