Microbiology MCQs

Option A: Active acquired immunity

Option B: Passive acquired immunity

Option C: Natural active immunity

Option D: Passive natural immunity

Correct Answer: Passive natural immunity ✔

Option A: IgM antibodies

Option B: Lysozyme

Option C: Mast cells

Option D: IgA antibodies

Correct Answer: IgA antibodies ✔

Option A: Plasma cells

Option B: Activated macrophages

Option C: Lymphocytes

Option D: Platelet

Correct Answer: Activated macrophages ✔

Option A: Interferons

Option B: Macrophages

Option C: Neutrophils

Option D: Autolysis

Correct Answer: Interferons ✔

Option A: Disproportionate antigen antibody levels

Option B: Excess antigen

Option C: Excess antibody

Option D: Hyper immune reaction

Correct Answer: Excess antibody ✔

Option A: Radioimmuno Assay

Option B: ELISA

Option C: Immunoflourescence

Option D: Passive hemaglutination

Correct Answer: Radioimmuno Assay ✔

Option A: IgG & igM

Option B: IgG & IgA

Option C: IgG & IgD

Option D: IgD & IgE

Correct Answer: IgG & igM ✔

Option A: Acts as a mucosal barrier for infection

Option B: Circulating antibody

Option C: Kills virus infected cells

Option D: Activates macrophages

Correct Answer: Acts as a mucosal barrier for infection ✔

Option A: Idiotope

Option B: Paratope

Option C: Epitope

Option D: Hapten

Correct Answer: Paratope ✔

Option A: IgA

Option B: IgE

Option C: IgG

Option D: IgM

Correct Answer: Both C & D ✔

Option A: Fungi

Option B: Gram +ve bacteria

Option C: Virus

Option D: Gram -ve bacteria

Correct Answer: Gram -ve bacteria ✔

Option A: Pseudomonas

Option B: coli

Option C: Proteus

Option D: Staphylococcus

Correct Answer: Proteus ✔

Option A: Transduction

Option B: Transformation

Option C: Mutation

Option D: conjugation

Correct Answer: conjugation ✔

Option A: Glutaraldehyde

Option B: Betapropiolactone

Option C: Formaldehyde

Option D: Hexachlorophen

Correct Answer: Both A & C ✔

Option A: 125°C for new seconds

Option B: 60°C for 15 minutes

Option C: 72°C for 5 minutes

Option D: 72° for 15 – 20 Sec

Correct Answer: D. 72° for 15 – 20 Sec ✔

Option A: -20°C to -7°C

Option B: -7°C to + 20°C

Option C: 25°C to 40°C

Option D: 55°C to 80°C

Correct Answer: 25°C to 40°C ✔

Option A: Transformation

Option B: Translation

Option C: Conjugation

Option D: Lysogeny

Correct Answer: Lysogeny ✔

Option A: Staphylococcus

Option B: Streptococcus

Option C: Gonococcus

Option D: Mycobacterium

Correct Answer: Mycobacterium ✔

Option A: Loefflers serum slope

Option B: Mc Conkey

Option C: Saboraud agar

Option D: Lowenstein Jensen medium

Correct Answer: Loefflers serum slope ✔

Option A: Chlorhexdine

Option B: Alcohol

Option C: Savlon

Option D: None of the above

Correct Answer: Chlorhexdine ✔

Option A: 10%

Option B: 2%

Option C: 5%

Option D: 15%

Correct Answer: 2% ✔

Option A: Introduction of complex media

Option B: Discovery of Rabies Vaccine

Option C: Discovery of M. Tuberculosis

Option D: Disproved spontaneous regression theory

Correct Answer: Discovery of M. Tuberculosis ✔

Option A: L-J medium

Option B: Robertson cooked meat medium

Option C: Loefflers medium

Option D: Sabourauds agar

Correct Answer: Robertson cooked meat medium ✔

Option A: Protein polysaccharide complex

Option B: Heat labile

Option C: Highly potent

Option D: Has specific tissue affinity

Correct Answer: Protein polysaccharide complex ✔

Option A: Forssman antigen antibody reaction

Option B: Weil-Felix reaction

Option C: Paul bunnel reaction

Option D: Widal reaction

Correct Answer: Widal reaction ✔

Option A: Increase toxigenicity

Option B: Increase antigenicity

Option C: Reduce the antigenicity

Option D: reduce the toxigenicity

Correct Answer: Increase antigenicity ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 4

Correct Answer: 4 ✔

Option A: antigenic and toxic

Option B: antigenic and non-toxic

Option C: non-antigenic and toxic

Option D: non-antigenic and non-toxic

Correct Answer: antigenic and non-toxic ✔

Option A: Functional differences

Option B: Structural differences

Option C: Complemented fixation

Option D: None of the above

Correct Answer: Structural differences ✔

Option A: 1 hour

Option B: 1 day

Option C: 1 week

Option D: 1 Month

Correct Answer: 1 Month ✔

Option A: Erythema

Option B: Necrosis

Option C: Induration

Option D: Vasculitis

Correct Answer: Erythema ✔

Option A: Blood agar

Option B: Tissue culture

Option C: Sabouraud’s agar

Option D: Thioglycollate medium

Correct Answer: C. Sabouraud’s agar ✔

Option A: Clostridia

Option B: S. epidermidis

Option C: Choleria

Option D: Mycobacterium

Correct Answer: Clostridia ✔

Option A: Lysis

Option B: Oxidation

Option C: Hydrolysis of DNA

Option D: Coagulation of proteins

Correct Answer: Oxidation ✔

Option A: Epinephrine

Option B: Steroids

Option C: Anti histamines

Option D: Antibiotics

Correct Answer: Epinephrine ✔

Option A: The bacteria should be able to be isolated from a diseased tissue

Option B: When inoculated in experimental animals bacteria may or may not cause disease

Option C: Pure cultures can be obtained

Option D: Bacteria should be able to be isolated from the diseased tissue in the experimental animals

Correct Answer: When inoculated in experimental animals bacteria may or may not cause disease ✔

Option A: Hapten

Option B: Carrier

Option C: Super antigen

Option D: Toxin

Correct Answer: Hapten ✔

Option A: It can kill hepatitis B virus

Option B: Used for sterilizing surgical instruments

Option C: Can kill mycobacterium tuberculosis

Option D: Can kill vegetative bacterial cells

Correct Answer: Used for sterilizing surgical instruments ✔

Option A: Long wavelength

Option B: short wave lenght

Option C: Ozone

Option D: Heat

Correct Answer: short wave lenght ✔

Option A: One day

Option B: Two successive days

Option C: 60 minutes

Option D: Three successive days

Correct Answer: Three successive days ✔

Option A: Type I hypersensitivity

Option B: Type II hypersensitivity

Option C: Type III hypersensitivity

Option D: Type IV hypersensitivity

Correct Answer: Type I hypersensitivity ✔

Option A: Hot air oven

Option B: U.V. rays

Option C: Gamma rays

Option D: Boiling

Correct Answer: Gamma rays ✔

Option A: It has got more bactericidal activity

Option B: It has got more bacteriostatic activity

Option C: It has got no deleterious effect on the cement and lenses of instruments

Option D: Its application is easier

Correct Answer: It has got no deleterious effect on the cement and lenses of instruments ✔

Option A: Autoclaving

Option B: Hot air oven

Option C: UV-Radiation

Option D: Inspissation

Correct Answer: Hot air oven ✔

Option A: Louis pasteur

Option B: Robert koch

Option C: Hensen

Option D: Ogston

Correct Answer: Robert koch ✔

Option A: 20% phenol

Option B: High efficiency particle arrestors

Option C: 40% formaldehyde vapour

Option D: Chlorine gas

Correct Answer: 40% formaldehyde vapour ✔

Option A: Lipids

Option B: Carbohydrates

Option C: Inorganic salts

Option D: Nucleic acids

Correct Answer: Nucleic acids ✔

Option A: Disinfection kills all spores but sterilization does not

Option B: Sterilization kills all spores but disinfection does not

Option C: Sterilization involves chemicals and disinfection involves physical methods

Option D: Sterilization is easier to achieve

Correct Answer: Sterilization kills all spores but disinfection does not ✔

Option A: Simple media

Option B: Transport media

Option C: Enriched media

Option D: Differential media

Correct Answer: Enriched media ✔

Option A: Internal structures are differentiated in living cells

Option B: Internal structures are differentiated in dead cells

Option C: Internal metabolic activities can be observed

Option D: External capsule formation can be observed

Correct Answer: Internal structures are differentiated in living cells ✔

Option A: Lipid-polysaccharide complex

Option B: Protein compound

Option C: Lipoprotein

Option D: None

Correct Answer: Protein compound ✔

Option A: Lag

Option B: Exponential growth

Option C: Stationary phase

Option D: Decline

Correct Answer: Stationary phase ✔

Option A: Clothes

Option B: Instruments

Option C: Culture media

Option D: Needles

Correct Answer: Culture media ✔

Option A: Ig A

Option B: Ig G

Option C: Prostaglandins

Option D: CD4

Correct Answer: CD4 ✔

Option A: IgD

Option B: IgM

Option C: IgA

Option D: IgE

Correct Answer: IgE ✔

Option A: IgA

Option B: IgD

Option C: IgG

Option D: IgM

Correct Answer: IgG ✔

Option A: Wd miller

Option B: Leumenhoek

Option C: Robertson

Option D: Socranci

Correct Answer: Leumenhoek ✔

Option A: Ig M

Option B: Ig A

Option C: Ig G

Option D: Ig D

Correct Answer: Ig G ✔

Option A: Kill all pathogenic micro-organisms

Option B: Kill all non-pathogenic micro-organisms in the environment

Option C: Deactivate all pathogens not spores

Option D: Deactivate all spores and dill pathogenic organism

Correct Answer: Deactivate all spores and dill pathogenic organism ✔

Option A: B lymphocytes

Option B: Erythrocytes

Option C: T lymphocytes

Option D: Antigen presenting cells (APC

Correct Answer: Erythrocytes ✔

Option A: C3

Option B: C5

Option C: C2

Option D: Protein B

Correct Answer: C3 ✔

Option A: Actinomyces israelii

Option B: Candida albicans

Option C: Mycobacterium tuberculosis

Option D: Streptococcus mutan

Correct Answer: Mycobacterium tuberculosis ✔

Option A: Different refractive indices of object

Option B: Different reflective indices of object

Option C: Light scattering

Option D: Light attenuation

Correct Answer: Different refractive indices of object ✔

Option A: Ultra violet rays

Option B: Ultrasonic vibrations

Option C: Infrared rays

Option D: Gamma rays

Correct Answer: Gamma rays ✔

Option A: complete antigen molecule

Option B: Hapten

Option C: Immunogen

Option D: Smallest antigenic determinant

Correct Answer: Smallest antigenic determinant ✔

Option A: Growing bacteria in adverse environment

Option B: Growing bacteria in unconventional host

Option C: Serial passage in an experimental host

Option D: Repeated cultures in artificial media

Correct Answer: Serial passage in an experimental host ✔

Option A: Type I hypersensitivity

Option B: Type II hypersensitivity

Option C: Type III hypersensitivity

Option D: Type IV hypersensitivity

Correct Answer: Type III hypersensitivity ✔

Option A: dna

Option B: Ribosome

Option C: Mitochondria

Option D: Cell wall

Correct Answer: Mitochondria ✔

Option A: Gamma-Rays

Option B: X-Rays

Option C: Autoclaving

Option D: Boiling

Correct Answer: Gamma-Rays ✔

Option A: Bile solubility

Option B: Optochin sensitivity

Option C: Bacitracin sensitivity

Option D: Cataslase positive

Correct Answer: Bacitracin sensitivity ✔

Option A: Bacteria

Option B: Viruses

Option C: Spore formers

Option D: Fungus

Correct Answer: Spore formers ✔

Option A: Escherichia Coli

Option B: Staphylococci

Option C: Spirochetes

Option D: Mycoplasma

Correct Answer: Mycoplasma ✔

Option A: IgG

Option B: IgA

Option C: IgM

Option D: IgD

Correct Answer: IgG ✔

Option A: Antigen recognition by B cells

Option B: Localization protection in external secretion

Option C: Compliment activation

Option D: Reagin activity

Correct Answer: Antigen recognition by B cells ✔

Option A: One Fc fragment and two Fab fragments

Option B: One Fc fragment and four Fab fragments

Option C: Two Fc fragments and two Fab fragments

Option D: Two Fc fragment and one Fab fragment

Correct Answer: One Fc fragment and two Fab fragments ✔

Option A: Robert Koch

Option B: Joeph Lister

Option C: John Hunter

Option D: Alexander flemings

Correct Answer: Joeph Lister ✔

Option A: Autoclaving

Option B: Hot air oven

Option C: Inspissation

Option D: Tyndallization

Correct Answer: Hot air oven ✔

Option A: Liquid paraffin → Dry heat

Option B: Glass syringes → Boiling at 169°C for 60 min

Option C: Flash pasteurization of milk → 72° C for 15 seconds, followed quickly by rapid cooling to 13°C for lower

Option D: Vaccines → Ethylene oxide

Correct Answer: Vaccines → Ethylene oxide ✔

Option A: Brucella

Option B: Mycobacterium

Option C: Salmonella

Option D: Coxiella burnetti

Correct Answer: Coxiella burnetti ✔

Option A: Region I

Option B: Region II

Option C: Region III

Option D: Boivin antigen

Correct Answer: Region I ✔

Option A: Payers patch

Option B: Lymph node

Option C: Thymus

Option D: Busra of Fabricius

Correct Answer: Thymus ✔

Option A: MHC I

Option B: MHC II

Option C: MHC III

Option D: B-cell receptor

Correct Answer: MHC I ✔

Option A: Helper T cells

Option B: Helper B cells

Option C: Monocytes

Option D: Macrophages

Correct Answer: Macrophages ✔

Option A: Type I

Option B: Type II

Option C: Type III

Option D: Type IV

Correct Answer: Type I ✔

Option A: B-cells

Option B: Active T cells

Option C: NK cells

Option D: Plasma cells

Correct Answer: Active T cells ✔

Option A: 17 D

Option B: Salk

Option C: Hepatitis

Option D: HDCV

Correct Answer: HDCV ✔

Option A: Cell wall of Gram positive organisms

Option B: Cell wall of Gram negative organisms

Option C: Cytoplasm of Gram positive organisms

Option D: Cytoplasm of Gram negative organisms

Correct Answer: Cell wall of Gram positive organisms ✔

Option A: Transfer of antibody from mother to child is through colostrum and acquired passive immunity naturally

Option B: Injection of antibodies (Hepatitis) is artificially acquired passive immunity

Option C: Antigenic stimulus given by vaccine (polio) is artificial active immunity

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Sabourauds medium

Option B: Agar – agar

Option C: Lowenstein Jensen medium

Option D: Loefflers serum slope

Correct Answer: Lowenstein Jensen medium ✔

Option A: Using chemical indicator strip or pouch

Option B: Recording a temperature/ pressure readings from sterilizer guage

Option C: Using a bacterial spore test

Option D: Determining the ability of a sterilizer to kill the hepatitis B virus

Correct Answer: Using a bacterial spore test ✔

Option A: IgG1

Option B: IgG2

Option C: IgG3

Option D: IgG4

Correct Answer: IgG1 ✔

Option A: Autoclaving

Option B: Hot air oven

Option C: Incineration

Option D: Formaldehyde

Correct Answer: Hot air oven ✔

Option A: Production of interferon

Option B: Lymphokine production

Option C: Rosette formation

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Same as epitopes

Option B: Carrier required for specific antibody production

Option C: High molecular protein

Option D: None of the above

Correct Answer: Carrier required for specific antibody production ✔

Option A: B lymphocytes

Option B: T lymphocytes

Option C: Monocytes

Option D: Histiocytes

Correct Answer: T lymphocytes ✔

Option A: Slide flocculation test

Option B: Tube flocculation test

Option C: Tube agglutination test

Option D: Latex agglutination test

Correct Answer: Slide flocculation test ✔

Option A: T-cells

Option B: B-cells

Option C: Lymph nodes

Option D: Mucosal epithelium

Correct Answer: Mucosal epithelium ✔

Option A: 2 light, 2 heavy chains

Option B: 1 heavy, 2 light chains

Option C: 1 light, 1 heavy chain

Option D: 3 light, 1 heavy chain

Correct Answer: 2 light, 2 heavy chains ✔

Option A: Clone

Option B: Epitope

Option C: Idiotope

Option D: Paratope

Correct Answer: Epitope ✔

Option A: Opsonisation

Option B: Chemotaxis

Option C: De coding

Option D: CFT

Correct Answer: Opsonisation ✔