- A) LD
- B) MLD
- C) ID
- D) All of the above
Microbiology MCQ
Total MCQ: 174
MCQ Quiz on Microbiology
102 L-forms are discovered by
- A) Klein Berger
- B) Louis Pasteur
- C) Robert Koch
- D) Antony von Leeuwenhoek
103 In an electron microscope, the source of electrons is from
- A) Mercury lamp
- B) Tungsten metal
- C) Both a and b
- D) None of these
104 The lethal dose required to kill 50% of the lab animals tested under standard conditions is called
- A) ID
- B) LD50
- C) ID50
- D) MLD
105 The causative organism of rocky mountain spotted fever was first described by
- A) Howard Ricketts
- B) da Rocha-lima
- C) Both a and b
- D) Robert Koch
106 The electrons passed out from the specimen are called
- A) Primary electrons
- B) Secondary electrons
- C) Tertiary electrons
- D) None of these
107 The most important virulence factors are
- A) Adhesions
- B) Invasiveness
- C) Toxigenicity
- D) Enzymes
108 The term bacteriophage was coined by
- A) De’Herelle
- B) F.W. Twort
- C) Beijernick
- D) Jwanosky
109 Mycorrhiza was first observed by
- A) Funk
- B) Frank
- C) Fisher
- D) Crick
110 The ability of a pathogen to spread in the host tissues after establishing the infection is known as
- A) Adhesion
- B) Invasiveness
- C) Toxigenicity
- D) None of these