The GATE Grind

GATE 2025 BT – Question 11

General Biology · Microbiology: History, bacterial classification and diversity, cell wall, Gram positive and negative bacteria, archaea, methods · 1 mark · Multiple choice

Koch's postulate was established by Robert Koch while working on a disease caused by

  1. Mycobacterium tuberculosis
  2. Bacillus anthracis
  3. Streptococcus pneumoniae
  4. Bacillus subtilis

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Correct answer: (B) Bacillus anthracis

Explanation

Koch first linked a specific bacterium to a disease in 1876 by studying anthrax, caused by Bacillus anthracis. He later used the postulates for tuberculosis as well.