Microbiology MCQs

Page No. 26

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


a Lag


bExponential growth


cStationary phase


dDecline


View Answer Stationary phase

Exotoxins are____________________?


aLipid-polysaccharide complex


b Protein compound


cLipoprotein


dNone


View Answer Protein compound

By using phase contrast microscope_______________?


aInternal structures are differentiated in living cells


bInternal structures are differentiated in dead cells


c Internal metabolic activities can be observed


dExternal capsule formation can be observed



Blood agar is________________?


aSimple media


bTransport media


cEnriched media


dDifferential media


View Answer Enriched media

The difference between sterilization and disinfection is that_______________?


a Disinfection kills all spores but sterilization does not


bSterilization kills all spores but disinfection does not


cSterilization involves chemicals and disinfection involves physical methods


dSterilization is easier to achieve



The component that sensitizes bacteria and virus to UV irradiation_______________?


aLipids


bCarbohydrates


cInorganic salts


dNucleic acids


View Answer Nucleic acids

Disinfection of the rooms can be done by using_______________?


a20% phenol


bHigh efficiency particle arrestors


c40% formaldehyde vapour


dChlorine gas



Sterilization of liquid paraffin is done by______________?


aAutoclaving


bHot air oven


cUV-Radiation


dInspissation


View Answer Hot air oven

Glutaraldehyde is preferred more than formaldehyde because______________?


aIt has got more bactericidal activity


bIt has got more bacteriostatic activity


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


dIts application is easier



Best method of sterilizing disposable syringes_______________?


aHot air oven


bU.V. rays


cGamma rays


dBoiling


View Answer Gamma rays

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