Top 50 Microbiology Objective Questions

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. 11. Protein particles which can infect are called

a. Virons
b. Prions
c. Nucleoida
d. None of these

b. Prions

Q. 12. In most of purple bacteria, the light harvesting centers are

a. B 850 & Fe-S
b. B 850 & B 875
c. B 845 & B 875
d. B 850 & B 830

b. B 850 & B 875

Q. 13. Endotoxin produced by gramnegative bacteria is present in

a). Peptidoglycan
b). Lippolysacharide
c). Theichoic acid
d). Inner membrane

b. Lippolysacharide

Q. 14. Which one of the following was Gram-negative, chemolithotrophic bacteria?

a). Siderococcus
b). E.coli
c). Spirellum
d). Mycoplasms

b. E.coli

Q. 15. The mode of reproduction which occurs in mycoplasma is

a. Budding
b. Bursting
c. Binary fission
d. Binary fusion

c. Binary fission

Q. 16. Which one of the following is about Herpes viruses?

a. Icosahedral, with envelope, ds DNA
b. Polyhedral with envelope, ds DNA
c. RNA, helical with envelope
d. ds DNA, brick shape

a. Icosahedral, with envelope, ds DNA

Q. 17. Which one of the following produce typical fried egg appearance colonies on solid media?

a. Mycobacteria
b. Mycoplasts
c. Mycoplasms
d. Bacteroides

c. Mycoplasms

Q. 18. Mycoplasmas are bacterial cells that a specific requirements for sodium chloride resembles

a. Halophile
b. Basophile
c. Barophile
d. Xerophile

a. Halophile

Q. 19. A population of cells derived from a single cell are called

(a). Monclonal cells
(b). Clones
(c). Protoplasts
(d). Sub culture

b. Clones

Q. 20. Hetrolactic acid bacteria produce

a. Lactic acid only
b. Lactic acid + H2O + CO2
c. Lactic acid + CO2
d. Lactic acid + alchohol + CO2

d. Lactic acid + alchohol + CO2

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