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990+ Microbiology Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Agriculture (BSc agri) .

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Chapter: History of Microbiology
51.

Electron microscope gives magnification upto

A. 100 X
B. 2000 X
C. 50,000 X
D. 2,00,000 X
Answer» D. 2,00,000 X
discuss
52.

Term vaccine was coined by

A. Robert Koch
B. Pasteur
C. Needham
D. None of these
Answer» B. Pasteur
discuss
53.

The inventor of Microscope is

A. Galileo
B. Antony von
C. Pasteur
D. Koch
Answer» B. Antony von
discuss
54.

First Pasteur conducted fermentation experiments in

A. Milk
B. Food material
C. Fruit juices
D. Both a and c
Answer» C. Fruit juices
discuss
55.

Modern concepts of chemotherapy was proposed by

A. Paul Ehrlich
B. Joseph Lister
C. Elie Metchnikoff
D. None of these
Answer» A. Paul Ehrlich
discuss
56.

The role of phagocytosis was discovered by

A. Paul Ehrlich
B. Joseph lister
C. Elie Metchikoff
D. Pasteur
Answer» C. Elie Metchikoff
discuss
57.

L – forms are discovered by

A. Klein Berger
B. Louis Pasteur
C. Robert Koch
D. Antony von Leeuwenhock
Answer» A. Klein Berger
discuss
58.

The causative organism of rocky mountain spotted fever was first described by

A. Howard Rickett
B. da Rocha-lima
C. Both a and b
D. Robert Koch
Answer» C. Both a and b
discuss
59.

The term bacteriophage was coined by

A. De’Herelle
B. F.W. Twort
C. Beijernick
D. Jwanosky
Answer» A. De’Herelle
discuss
60.

Viral infection of bacteria was discovered by

A. De’Herelle
B. F.W. Twort
C. Beijernick
D. Jwanoksy
Answer» B. F.W. Twort
discuss
61.

Eye cannot resolve any image less than

A. 1ìm
B. 2ìm
C. 7ìm
D. 5ìm
Answer» D. 5ìm
discuss
62.

Compound Microscope was discovered by

A. A.V. Lewenhoek
B. Pasteur
C. Janssen and Hans
D. None of these
Answer» C. Janssen and Hans
discuss
63.

Electron Microscope was discovered by

A. Prof. Fritz
B. Janssen and Hans
C. Knoll and Ruska
D. None of these
Answer» C. Knoll and Ruska
discuss
64.

Magnification range of light microscope is

A. 1000x – 5000x
B. 1000x – 2000x
C. 500x – 1000x
D. None of these
Answer» B. 1000x – 2000x
discuss (1)
65.

Condensation of light in light Microscope is by

A. Objective
B. Condensor
C. Ocular
D. All of these
Answer» B. Condensor
discuss
66.

Light gathering capacity of Microscope is called

A. Numerical aperture
B. Angular aperture
C. Both a and b
D. None of these
Answer» A. Numerical aperture
discuss
67.

If 10x and 40x objectives are used (air is the medium), the numerical aperture is

A. 1.5
B. 2.0
C. 1.0
D. 1.8
Answer» C. 1.0
discuss
68.

The ability of Microscope to distinguish two objects into two separate objects, is called.

A. Resolving power
B. Wave length
C. N.A.
D. None of these
Answer» A. Resolving power
discuss
69.

Limit of resolution of compound microscope is

A. 0.018 Ao
B. 0.1 mm
C. 5 ìm
D. 1 mm
Answer» B. 0.1 mm
discuss
70.

Source of light in fluorescence microscopy is from

A. Mercury lamp
B. Sunlight
C. Both a and b
D. None of these
Answer» A. Mercury lamp
discuss
71.

Who perfected a magnetic lens in 1927

A. Gabor
B. Broglie
C. Busch
D. None of these
Answer» A. Gabor
discuss
72.

The magnefication power of electron microscope developed by Knell and Ruska is

A. 10,000x
B. 12,000x
C. 15,000x
D. 20,000x
Answer» B. 12,000x
discuss
73.

The e lectron passed out from the specimen are called

A. Primary electron
B. Secondary electrons
C. Tertiary electrons
D. None of these
Answer» B. Secondary electrons
discuss
74.

Mycorrhiza was first observed by

A. Funk
B. Frank
C. Fisher
D. Crick
Answer» B. Frank
discuss
75.

The transfer of genetic material during transformation is proved basing on Griffith’s experiment by

A. Avery Macleod & Mc.Carthy
B. Lederberg & Taulum
C. Zinder & Lederberg
D. Watson & Crick
Answer» A. Avery Macleod & Mc.Carthy
discuss
76.

Phagocytic theory was proposed by

A. Louis Pasteur
B. Elie Metchnikoff
C. Behring
D. Widal
Answer» B. Elie Metchnikoff
discuss
77.

Anaphylaxia was first observed by

A. Parter & Richet
B. Coombs
C. Gell
D. None of these
Answer» A. Parter & Richet
discuss
78.

Primary mediators in anaphylaxis

A. Histamine
B. Seratonin
C. Heparin
D. All of these
Answer» D. All of these
discuss
79.

Arthus reaction was discovered by

A. Marrice Arthu
B. Von Perquit
C. Richet
D. Porter
Answer» A. Marrice Arthu
discuss
80.

Serum sickness reaction was discovered by

A. Marrice Arthu
B. Von perquit
C. Richet
D. Porter
Answer» B. Von perquit
discuss
81.

Hybridoma technique was developed by

A. Kochler & Milston
B. Niel’s Jerne
C. Both a and b
D. None of these
Answer» C. Both a and b
discuss
82.

Disease that effects many people at different countries is termed as.

A. Sporadic
B. Pandemic
C. Epidemic
D. Endemic
Answer» B. Pandemic
discuss
83.

If the vectors transmit the infection mechanically they are called

A. Biological vectors
B. Mechanical vectors
C. Biological reservoir
D. Both a and c
Answer» B. Mechanical vectors
discuss
84.

If a person can be infected by direct contact with infected tissue of another person, it is termed as

A. Indirect contact transmission
B. Attachment
C. Direct contact transmission
D. None of these
Answer» C. Direct contact transmission
discuss
85.

Reduction of virulence is known as

A. Exaltation
B. Attenuation
C. Both a and b
D. None of these
Answer» B. Attenuation
discuss
86.

Enhancement of virulence is known as

A. Exaltation
B. Attenuation
C. Both a and b
D. None of these
Answer» A. Exaltation
discuss
87.

The virulence of a pathogen is usually measured by

A. LD
B. MLD
C. ID
D. All of the above
Answer» D. All of the above
discuss
88.

The lethal dose required to kill 50% of the lab animals tested under standard called

A. ID
B. LD50
C. ID50
D. MLD
Answer» B. LD50
discuss
89.

The ability of a pathogen to spread in ths host tissues after establishing the infection is known as

A. Adhesion
B. Invasiveness
C. Toxigenicity
D. None of these
Answer» B. Invasiveness
discuss
90.

Which is the following enzyme acts as a spreading factor?

A. Hyaluronidase
B. Coagulase
C. Catalase
D. DNase
Answer» A. Hyaluronidase
discuss
91.

Vibrio Cholerae was discovered by

A. Koch
B. Metchnikoff
C. John Snow
D. Virchow
Answer» A. Koch
discuss
92.

E.coli was first isolated by

A. Louis Pasteur
B. Escherich
C. Shiga
D. Robert Koch
Answer» B. Escherich
discuss
93.

Mycobacterium tuberculosis was first discovered by

A. Robert Koch
B. Edward Jenner
C. Louis Pasteur
D. None of these
Answer» A. Robert Koch
discuss
94.

Mycobacterium lepree was discovered by

A. Robert Koch
B. Hansen
C. Edward Jenner
D. Louis Pasteur
Answer» B. Hansen
discuss
95.

Streptococcus pneumoniae was isolated by

A. Robert Koch
B. Edward Jenner
C. Antony von Leewenhock
D. Louis Pasteur
Answer» D. Louis Pasteur
discuss
96.

B.anthracis was isolated by

A. Louis Pasteur
B. Robert Koch
C. Antonyvon Leewenhok
D. None of these
Answer» B. Robert Koch
discuss
97.

Staphylococcus aureus was isolated by

A. Rosenbach
B. Louis Pasteur
C. Passet
D. Sir Alexander Ogston
Answer» B. Louis Pasteur
discuss
98.

Pseudomonas aeruginosa was first named

A. Schroeter and Gessard
B. Robert Koch
C. Louis Pasteur
D. Edward Jenner
Answer» A. Schroeter and Gessard
discuss
99.

T. pallidum was discovered by

A. Robert Koch
B. Schaudinn and Hoffman
C. Louis Pasteur
D. Edward Jenner
Answer» B. Schaudinn and Hoffman
discuss
100.

Neisseria gonorrhoeae was first described by

A. Neisser in 1879
B. Pasteur in 1878
C. Robert Koch
D. None of these
Answer» B. Pasteur in 1878
discuss

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