Microbiology Multiple Choice Questions (MCQ). Microbiology (Bacteria) MCQ is most important for all agriculture exam [y] like ICAR-JRF Plant Science, JRF Entomology, JRF Horticulture, JRF Agronomy [y], BHU Pre-PG, Raj Pre-PG [y], IBPS-SO/AFO [y], NET [y], CCI, IFFCO, NSC, AO, AAO, etc.
Q. 1. Cold-like symptoms are caused by which bacteria
a. Pseudomonas
b. E.coli
c. Haemophilus influenza
d. Haemophilus streptococcus
c. Haemophilus influenza
Q. 2. In Streptococcus faecalis, the conjugation takes place at
a. Pili
b. Cell membrane
c. Cell wall
d. Flagella
c. Cell wall
Q. 3. The infected mad dogs may contain
a). Nergi bodies
b). Niagri bodies
c). Negri bodies
d). Neisser bodies
c. Negri bodies
Q. 4. What disease the Nesser will produce?
a). Mumps
b). Rubella
c). Polio
d). Measles
d). Measles
Q. 5. Rancidity in spoiled foods is due to
a. Lipolytic organisms
b. Proteolytic organisms
c. Toxigenic microbes
d. Saccharolytic microbes
a. Lipolytic organisms
Q. 6. The Bacterium that is most commonly used in genetic engineering is
a). Escherichia
b). Klebsiella
c). Proteius
d). Serratia
a). Escherichia
Q. 7. The functions of plasmid are
a. DNA replication
b. Protein synthesis
c. Cell wall synthesis
d. None of the above
d. None of the above
Q. 8. Mycoplasmas are bacterial cells that
a. Fail to reproduce on artificial media
b. Have a rigid cell wall
c. Are resistant to penicillin
d. Stain well with Gram’s stain
c. Are resistant to penicillin
Q. 9. The etiologic agent of botulism is a
(a). Neurotoxin
(b). Endotoxin
(c). Enterotoxin
(d). All of the above
a). Neurotoxin
Q. 10. The bacterial cells are at their metabolic peak during
(a). Lag phase
(b). Log
(c). Stationary
(d). Decline
(b). Log