Samples – Multiple choice questions of Microbiology II (part I)

1.Which division of bacteria has a Gram-positive cell wall?
a.Gracilicutes b.Archaea c.Firmicutes d.Tenericutes

2. What is the appearance of Gram-positive and gram negative bacteria in the Gram’s staining after alcohol treatment?
a. violet-Red b. Red-Violet c. colorless-colorless d. violet- colorless

3.Mycoplasma———— .
a. are the smallest free-living organism
b.Have a typical bacterial cell wall
c. are sensitive to penicillin
d. are sensitive to tetracycline

4.Porin proteins are used for————–
a. Chemotaxis
b. Uptake of water-soluble nutrients
c. Biosynthesis of inclusion bodies
d. Restriction endonuclease

5. The ability of species of Klebsiella to grow and divide in a sterile glucose solution is probably related to the microorganism’s ability to:
a.Use Co2 from air as a source of O2
b.Utilize ammonia, which is part of the glucose solution
c.Use glucose as a carbon source and nitrogen gas as a nitrogen source
d.Use glucose as a source of carbon and nitrogen

6.Which of the following media can support growth of anaerobes, aerobes, microaerophilic, and fastidious bacteria?
a.Tetrathionate broth b.Thayermartin agarc.Thioglycolate broth d.TCBS

7. What is the movement pattern of bacterial flagella for forward swimming?
a. Asymmetrical whip like motion of flagella
b. Symmetrical sinusoidal wave motion of flagella
c. Counter clockwise rotation of flagella
d. Clock wise rotation of flagella

8. Bacteriochlorophyll-a differs from chlorophyll a only in group attached at———-
a. R1 b.R2 c.R3 d. None

9. Which part is present in all bacteria?
a.Peptidoglycan b.Outer membrane c.Capsule d.mesosomes

10.Which chemical composition is present only in spore formers?
a.Diaminopimleic acid b.Nuraminic acid c.Muramic acid d.Dipicolinic acid

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