Q.80
Match the scientists in Group I with their contributions in microbiology in Group II
| Group I | Group II |
|---|---|
| P. Robert Hooke Q. Paul Ehrlich R. Antony van Leeuwenhoek S. Sergei Winogradsky | I. Proved that microbes can cause diseases II. First to observe cells III. First to observe bacteria IV. Used the first synthetic chemotherapeutic agent V. Linked specific bacteria to biogeochemical transformations |
Correct Answer: (B) P-II, Q-IV, R-III, S-V
Robert Hooke first observed cells through his microscope in 1665, naming them “cells” from cork samples. Antony van Leeuwenhoek first observed bacteria (and protozoa) in the 1670s using superior single-lens microscopes. Paul Ehrlich used the first synthetic chemotherapeutic agent (Salvarsan) against syphilis in 1910. Sergei Winogradsky linked specific bacteria to biogeochemical transformations like nitrogen fixation.
Option Analysis
Option (A) P-I, Q-II, R-III, S-V
Incorrect. Hooke (P) did not prove microbes cause diseases (I; that’s Koch/Louis Pasteur’s germ theory). Hooke observed cells (II), not diseases.
Option (B) P-II, Q-IV, R-III, S-V
Correct. Matches exactly: Hooke-cells (II), Ehrlich-chemotherapeutic (IV), Leeuwenhoek-bacteria (III), Winogradsky-biogeochemical (V).
Option (C) P-II, Q-I, R-III, S-IV
Incorrect. Ehrlich (Q) did not prove microbes cause diseases (I; his work was chemotherapy). Winogradsky (S) did biogeochemical links (V), not chemotherapy (IV).
Option (D) P-V, Q-III, R-IV, S-II
Incorrect. Hooke (P) did not link bacteria to biogeochemistry (V) or observe bacteria (III; Leeuwenhoek did). Mismatches all except possibly one.
Introduction to Scientists Contributions Microbiology
In scientists contributions microbiology, matching pioneers like Robert Hooke, Paul Ehrlich, Antony van Leeuwenhoek, and Sergei Winogradsky to their discoveries is key for GATE Life Sciences prep. This GATE 2013 question tests foundational history: Hooke first observed cells, Leeuwenhoek bacteria, Ehrlich chemotherapy, Winogradsky biogeochemistry. Correct match is option (B).
Robert Hooke: First to Observe Cells
Robert Hooke (1635-1703) published Micrographia (1665), describing cork cells under a compound microscope—the first published cell observation (II). He depicted mold (Mucor) but not bacteria. This laid microscopy groundwork.
Antony van Leeuwenhoek: First to Observe Bacteria
Antony van Leeuwenhoek (1632-1723) crafted single-lens microscopes (270x magnification), first observing “animalcules” (bacteria/protozoa) in pond water, teeth scrapings (1670s)—earning him “Father of Microbiology” (III).
Paul Ehrlich: Synthetic Chemotherapeutic Agent
Paul Ehrlich (1854-1915), “Father of Chemotherapy,” synthesized Salvarsan (arsphenamine, 606th compound) in 1909—first targeted antimicrobial against syphilis spirochetes (IV). Nobel Prize 1908 for immunity work.
Sergei Winogradsky: Biogeochemical Transformations
Sergei Winogradsky (1856-1940) pioneered microbial ecology, linking bacteria like nitrifiers, sulfur oxidizers to nitrogen/sulfur cycles (1880s-90s). Discovered chemolithotrophy (V); “Father of Soil Microbiology.”
Why This Matters for GATE Life Sciences
GATE questions on scientists contributions microbiology recur in XL section (Microbiology/Biochemistry). Memorize: Hooke-cells (plant), Leeuwenhoek-bacteria (animalcules), Koch-disease proof (not here), Ehrlich-drugs, Winogradsky-cycles. Practice PYQs for patterns.
