Microbiology MCQs

Page No. 24

Cell wall deficient bacteria are_______________?


aEscherichia Coli


bStaphylococci


cSpirochetes


dMycoplasma


View Answer Mycoplasma

Purpose of Sterilization is to eliminate________________?


aBacteria


bViruses


cSpore formers


dFungus


View Answer Spore formers

A child presents with infective skin lesions of the leg. Culture was done which showed gram positive cocci in chains and haemolytic colonies. Which of the following tests will best identify the organism ?


a Bile solubility


bOptochin sensitivity


c Bacitracin sensitivity


dCataslase positive



The Manufacturing unit of surgical needle & sutures are sterilized by ________________?


aGamma-Rays


bX-Rays


cAutoclaving


dBoiling


View Answer Gamma-Rays

Bacterial cell does not possess___________________?


adna


bRibosome


cMitochondria


dCell wall


View Answer Mitochondria

Post streptococcal acute glomerulo nephritis is an example of________________?


aType I hypersensitivity


bType II hypersensitivity


cType III hypersensitivity


dType IV hypersensitivity



The Process of attenuation can be achieved by all except___________________?


aGrowing bacteria in adverse environment


bGrowing bacteria in unconventional host


cSerial passage in an experimental host


d Repeated cultures in artificial media



The term epitope refers to________________?


acomplete antigen molecule


bHapten


cImmunogen


dSmallest antigenic determinant



Cold sterilization refers to the process of sterilization by use of____________________?


aUltra violet rays


b Ultrasonic vibrations


cInfrared rays


dGamma rays


View Answer Gamma rays

Phase contrast microscopy is based on principle of__________________?


a Different refractive indices of object


bDifferent reflective indices of object


cLight scattering


dLight attenuation



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