Microbiology MCQs

Page No. 26

Zero growth rate is observed during one of the phase of the bacterial growth curve______________?


a Lag

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bExponential growth

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cStationary phase

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dDecline

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View Answer Stationary phase

Exotoxins are____________________?


aLipid-polysaccharide complex

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b Protein compound

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cLipoprotein

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dNone

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View Answer Protein compound

By using phase contrast microscope_______________?


aInternal structures are differentiated in living cells

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bInternal structures are differentiated in dead cells

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c Internal metabolic activities can be observed

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dExternal capsule formation can be observed

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Blood agar is________________?


aSimple media

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bTransport media

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cEnriched media

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dDifferential media

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View Answer Enriched media

The difference between sterilization and disinfection is that_______________?


a Disinfection kills all spores but sterilization does not

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bSterilization kills all spores but disinfection does not

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cSterilization involves chemicals and disinfection involves physical methods

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dSterilization is easier to achieve

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The component that sensitizes bacteria and virus to UV irradiation_______________?


aLipids

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bCarbohydrates

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cInorganic salts

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dNucleic acids

✓


View Answer Nucleic acids

Disinfection of the rooms can be done by using_______________?


a20% phenol

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bHigh efficiency particle arrestors

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c40% formaldehyde vapour

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dChlorine gas

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Sterilization of liquid paraffin is done by______________?


aAutoclaving

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bHot air oven

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cUV-Radiation

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dInspissation

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View Answer Hot air oven

Glutaraldehyde is preferred more than formaldehyde because______________?


aIt has got more bactericidal activity

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bIt has got more bacteriostatic activity

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cIt has got no deleterious effect on the cement and lenses of instruments

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dIts application is easier

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Best method of sterilizing disposable syringes_______________?


aHot air oven

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bU.V. rays

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cGamma rays

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dBoiling

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View Answer Gamma rays

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