Top 250+ Solved Bacteria and Gram Staining MCQ Questions Answer
Q. A man is usually infected for tick typhusby –
a. Drinking milk of sick animals
b. Tending cattle
c. Inhaling infected dust
d. All of these
Q. In Gram positive bacteria, ratio of RNAto DNA is
a. 8 : 1
b. 1 : 2
c. Almost equal
d. None of these
Q. Ziehl – Neelson stain is a ______
a. Simple stain
b. Counter stain
c. Differential stain
d. None of them
Q. Wet mount slide preparations are usedin microbiology as they allow to see
a. Size and shape of individual organisms
b. Characteristic arrangement or grouping of cells
c. Motility of the organism
d. All of these
Q. Freeze-etch particles (used in preparing cell for electron microscopy) can be located in the
a. Cytoplasm
b. Cell wall
c. Cell membrane
d. Nucleus
Q. The properties common to Gram positiveand negative cell walls are
a. Equal susceptibility to hydrolysis by lysozyme
b. Peptide crosslinks between polysaccharides
c. Rigid peptoglycon activity
d. Greater resistance to drying than vegetative cell.
Q. The main difference in true bacteria andmycoplasma is that it does not posses –
a. Flagella
b. Cell wall
c. ATP synthesis
d. A capsule
Q. The organism responsible for retarding penetration of host cell by an inhibitor of ATP synthesis.
a. M.pneumoniae
b. Rickettsia rickettsii
c. Chlamydia trachomatis
d. Chlamydia psitacci
Q. Mycoplasmas differ from Chalamy-diae in that, it
a. has ability to cause urinary tract infection
b. lack of atrue bacterial cell wall
c. susceptible to penicillin
d. All of these
Q. Fungal disease in human is caused by –
a. Inhalation of conidia
b. Invasion of mucous membrane
c. Contamination of wounds with conidia or myceliat fragments
d. All of these
Q. A polysaccharide capsule is present on cryptococci which –
a. Inhibits phagocytosis
b. Is an aid to diagnose
c. Cross reacts with rheumatoid factor
d. All of these
Q. The largest protozoa is –
a. Balantidium coli
b. Entamoeba coli
c. Trichomonus vaginalis
d. Toxoplasma gondii
Q. Which of the following vaccine contains attenuated form of bacteria?
a. BCG
b. TAB
c. Polio
d. Cholera