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WorksheetsKoch's Postulates and Microbiology Quiz
Total questions: 20
Worksheet time: 10mins
Koch’s postulates are used to:
Identify viruses
Establish relationship between microbe & disease
Classify bacteria
Detect immunity
One requirement of Koch’s postulates is:
Organism must be present in all healthy individuals
Organism must be isolated in pure culture
Organism must grow only in vivo
Organism must be acid-fast
Koch proved that tuberculosis is caused by:
Mycobacterium bovis
Klebsiella pneumoniae
Mycobacterium tuberculosis
Actinomyces
Who discovered the tubercle bacillus?
Louis Pasteur
Robert Koch
Edward Jenner
Joseph Lister
Paul Ehrlich is known as:
Father of virology
Father of chemotherapy
Father of immunology
Father of antisepsis
“Magic bullet” therapy was proposed by:
Pasteur
Koch
Ehrlich
Fleming
First successful treatment of syphilis (Salvarsan) was discovered by:
Koch
Ehrlich
Jennings
Leeuwenhoek
Edward Jenner is known for:
Discovering penicillin
Developing smallpox vaccine
Discovering TB bacillus
Developing Gram stain
Jenner used which virus for vaccination?
Variola major
Variola minor
Cowpox virus
Monkeypox virus
Gram stain was developed by:
Christian Gram
Pasteur
Ehrlich
Koch
Primary stain in Gram staining is:
Safranin
Methylene blue
Crystal violet
Malachite green
Mordant used in Gram staining is:
Iodine
Alcohol
Acetone
Carbol fuchsin
Decolorizer in Gram stain is:
Water
Phenol
Alcohol/acetone
Acetic acid
Gram-positive bacteria appear:
Pink
Red
Blue-purple
Colorless
Reason for Gram-positive reaction:
Thin peptidoglycan
High lipid content
Thick peptidoglycan
Absence of teichoic acid
Ziehl–Neelsen stain is used to detect:
Gram-positive cocci
Gram-negative bacilli
Acid-fast bacilli
Fungi
Primary stain in acid-fast stain:
Methylene blue
Crystal violet
Carbol fuchsin
Malachite green
Decolorizer in ZN staining is:
Alcohol-acetone
20% sulfuric acid
Water
Phenol only
Counterstain used in ZN staining:
Crystal violet
Safranin
Methylene blue
Malachite green
Acid-fastness is due to:
Peptidoglycan
Teichoic acid
Mycolic acid in cell wall
Glycocalyx
