Microbiology MCQs

Option A: Fungus

Option B: Acid fast, non-motile bacillus

Option C: Anaerobic, gram positive, non-acid fast bacteria.

Option D: Retrovirus

Correct Answer: Anaerobic, gram positive, non-acid fast bacteria. ✔

Option A: Unable to grow in the presence of oxygen

Option B: Unable to grow in the absence of oxygen

Option C: Able to grow in the presence of carbon dioxide

Option D: Able to grow in the presence of absence of oxygen

Correct Answer: Able to grow in the presence of absence of oxygen ✔

Option A: Anthrax

Option B: Typhoid

Option C: Bacillary dysentery

Option D: Cholera

Correct Answer: Anthrax ✔

Option A: Alpha hymolytic streptococci (S. viridans)

Option B: Staphylococci

Option C: Beta hemolytic streptococci

Option D: Pneumococci

Correct Answer: Alpha hymolytic streptococci (S. viridans) ✔

Option A: Pleomorphism

Option B: Elaboration of an enzyme that destroy penicillin

Option C: Penicillin analogue production

Option D: Lack of nucleic acid in the cell wall

Correct Answer: Elaboration of an enzyme that destroy penicillin ✔

Option A: Facio-cervical actinomycosis

Option B: Cutaneous anthrax

Option C: Infected squamous cell carcinoma

Option D: None of the above

Correct Answer: Cutaneous anthrax ✔

Option A: Salmonella

Option B: Klebsiella

Option C: Escherichia

Option D: Paracolons

Correct Answer: Salmonella ✔

Option A: Salk vaccine

Option B: Tetanus toxoid

Option C: Sabin’s oral vaccine

Option D: All of the above

Correct Answer: Salk vaccine ✔

Option A: E.coli

Option B: Bacteroides

Option C: Pseudomonas

Option D: Klebsiella

Correct Answer: Bacteroides ✔

Option A: Streptococcus

Option B: Staphylococcus

Option C: E.coli

Option D: Gonococci

Correct Answer: Staphylococcus ✔

Option A: Lysozyme

Option B: Fibrinolysin

Option C: Coagulase

Option D: S protein

Correct Answer: Coagulase ✔

Option A: Though plasmids

Option B: Incorporating part of host DNA

Option C: Through bacteriophages

Option D: through conjugation

Correct Answer: Incorporating part of host DNA ✔

Option A: Clostridium tetani

Option B: Pseudomonas

Option C: Shigella

Option D: Klebsiella

Correct Answer: Clostridium tetani ✔

Option A: Syphilis

Option B: Gonorrhea

Option C: TB

Option D: Tyhoid

Correct Answer: Syphilis ✔

Option A: Tularemia

Option B: Diptheria

Option C: Gonorrhoea

Option D: All o f the above

Correct Answer: Diptheria ✔

Option A: in the presence of oxygen

Option B: in the presence of nitrogen

Option C: in the absence of oxygen

Option D: differential media

Correct Answer: in the absence of oxygen ✔

Option A: It consists of a mixed polymer called peptidoglycon

Option B: It is the structure principally responsible for the reaction of gram staining

Option C: It is a unique flexible plastic structure

Option D: It contains D-isomers of amino acids

Correct Answer: It is a unique flexible plastic structure ✔

Option A: Cl. difficile

Option B: Staphylococcus

Option C: Cl. welchii

Option D: Cl. botulinum

Correct Answer: Cl. difficile ✔

Option A: It is composed of DNA

Option B: It doe not contain histones

Option C: It is circular

Option D: Its DNA has both introns and extrons

Correct Answer: Its DNA has both introns and extrons ✔

Option A: Cocci

Option B: Spirochetes

Option C: Bacteriophages

Option D: Filamentous rods

Correct Answer: Spirochetes ✔

Option A: Capsule

Option B: Fimbria

Option C: Flagella

Option D: None of the above

Correct Answer: Fimbria ✔

Option A: Haemorrhage

Option B: perforation

Option C: Osteomyelitis

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Feacus

Option B: Urine

Option C: Blood

Option D: All of the above

Correct Answer: Blood ✔

Option A: Bunch of a

Option B: Chain of beads

Option C: Drum stick

Option D: Safely pin

Correct Answer: Drum stick ✔

Option A: Scanning microscope

Option B: Inverted microscope

Option C: Dark ground microscope

Option D: Electron microscope

Correct Answer: Dark ground microscope ✔

Option A: Treponema pallidum

Option B: Mycobacterium leprae

Option C: N. gonorrhoeae

Option D: None of the above

Correct Answer: None of the above ✔

Option A: Viral stomatitis

Option B: Diptheria

Option C: Tuberculosis

Option D: Typhoid fever

Correct Answer: Typhoid fever ✔

Option A: Tannerella

Option B: Porphyromonas

Option C: Buccae

Option D: Prevotella

Correct Answer: Buccae ✔

Option A: Most common cause is B. Petrussis

Option B: It may occur in children and young adult after vaccination

Option C: Bacteria culture from nasopharyngeal swab is the definitive diagnosis

Option D: Presence of antibodies in serum in diagnostic of the disease

Correct Answer: Presence of antibodies in serum in diagnostic of the disease ✔

Option A: 5

Option B: 10

Option C: 15

Option D: 20

Correct Answer: 10 ✔

Option A: Actinomyces viscosus

Option B: Lactobacillus acidophilus

Option C: Streptococcus mutans

Option D: Veilonella parvula

Correct Answer: Lactobacillus acidophilus ✔

Option A: Strick aerobes

Option B: Can grow in disinfectants in hospital

Option C: Infection is mostly due to endogenous source

Option D: Most common organism is burn patient

Correct Answer: Infection is mostly due to endogenous source ✔

Option A: Diagnosis

Option B: Prognosis

Option C: Treatment plan

Option D: Epidemiology

Correct Answer: Prognosis ✔

Option A: Base lines differ depending on the endemicity of the disease

Option B: O antibodiest last longer and hence is not indicative of recent infection

Option C: H antigen cannot differentiate between subtypes

Option D: High titre value in a single widal test is not confirmative

Correct Answer: O antibodiest last longer and hence is not indicative of recent infection ✔

Option A: Faeces & urine of rodents is the cause

Option B: Onset of IgM in 2 days

Option C: Incubation period is 10 days

Option D: It is sensitive to penicillin

Correct Answer: Onset of IgM in 2 days ✔

Option A: Invasion

Option B: Endotoxin

Option C: Exotoxin

Option D: Capsule

Correct Answer: Exotoxin ✔

Option A: Ulcerative gingivostomatitis

Option B: Caused due to malnutrition

Option C: A symbiotic infection

Option D: Caused by leptospira interrogans

Correct Answer: Caused by leptospira interrogans ✔

Option A: Rheumatoid arthritis

Option B: Typhoid fever

Option C: Rheumatie fever

Option D: Rickettsial fever

Correct Answer: Rheumatie fever ✔

Option A: Synovial fluid

Option B: Myocardium

Option C: Cardiac valves

Option D: Vascular intima

Correct Answer: Cardiac valves ✔

Option A: Clostridium botulinum

Option B: Clostridium welchii

Option C: Clostridium tetani

Option D: Clostridium difficile

Correct Answer: Clostridium welchii ✔

Option A: ADP – ribosylation of the G regulatory protein

Option B: Inhibition of adenyl cyclase

Option C: Activation of GTPase

Option D: Active absorption of NaCI

Correct Answer: A. ADP – ribosylation of the G regulatory protein ✔

Option A: Cardiolipin

Option B: Plasminogen

Option C: Palmityl lecithin

Option D: Serine

Correct Answer: Cardiolipin ✔

Option A: Incubation period of 24 hours

Option B: Requires immediate antibiotics

Option C: Common with dairy products

Option D: Heat labile enterotoxin

Correct Answer: Common with dairy products ✔

Option A: Culture

Option B: Gram stain

Option C: Biochemical reaction

Option D: Haemagglutination test

Correct Answer: Haemagglutination test ✔

Option A: Transduction

Option B: Translation

Option C: Lysogeny

Option D: Conjugation

Correct Answer: Lysogeny ✔

Option A: Group A

Option B: Group B

Option C: Group C

Option D: Group D

Correct Answer: Group B ✔

Option A: Y. pestis

Option B: Pertussis

Option C: Mycoplasma

Option D: M-Tuberculosis

Correct Answer: Pertussis ✔

Option A: Aryl sulphatase test

Option B: Niacin test

Option C: Neutral red test

Option D: Catalase peroxidase test

Correct Answer: Neutral red test ✔

Option A: Gram positive organisms

Option B: Gram negative organisms

Option C: Mycoplasma

Option D: Virus infections

Correct Answer: Gram negative organisms ✔

Option A: Bacterial spore

Option B: Bacterial Flagella

Option C: Bacterial capsule

Option D: Bacterial fimbriae

Correct Answer: Bacterial fimbriae ✔

Option A: Spirochaetes

Option B: Fusiform bacilli

Option C: Treponema vincenti

Option D: None of the above

Correct Answer: Fusiform bacilli ✔

Option A: Through plasmids

Option B: Incorporating part of host DNA

Option C: Through bacteriophages

Option D: Through conjugation

Correct Answer: Incorporating part of host DNA ✔

Option A: Neisseria meningitides

Option B: Salmonella typhi

Option C: Streptococcus pyogenes

Option D: Legionella pneumophila

Correct Answer: Streptococcus pyogenes ✔

Option A: Trachoma

Option B: Non-gonococcal urethritis

Option C: Pneumonia

Option D: Parotitis

Correct Answer: Parotitis ✔

Option A: M Protein

Option B: Polysaccharide C antigen

Option C: Type of lipid in cell membrane

Option D: Physiological properties

Correct Answer: Polysaccharide C antigen ✔

Option A: Dischange from nasal mucosa

Option B: From open sore

Option C: Through intact skin

Option D: Through breast milk

Correct Answer: Through breast milk ✔

Option A: Niacin test

Option B: AFB staining

Option C: Pas staining

Option D: None of the above

Correct Answer: Niacin test ✔

Option A: CD 4*

Option B: CD 8*

Option C: B – lymphocytes

Option D: None of the above

Correct Answer: CD 4* ✔

Option A: Coagulase

Option B: Hyaluronidase

Option C: Lecithinase

Option D: None of the above

Correct Answer: Lecithinase ✔

Option A: Cl. tetani

Option B: Cl. tetanomorphum

Option C: Cl. sphenoids

Option D: All of the above

Correct Answer: Cl. tetani ✔

Option A: Rickettsia tsutsugamushi

Option B: R. prowozekii

Option C: R. quintana

Option D: C. burnetti

Correct Answer: D. C. burnetti ✔

Option A: Gram positive bacteria

Option B: Gram negative bacteria

Option C: Fungus

Option D: A yeast like form

Correct Answer: Gram positive bacteria ✔

Option A: Non – Specific

Option B: Slide flocculation test

Option C: Best followed for drug therapy

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Osteomyelitis

Option B: Abscess

Option C: Scarlet fever

Option D: Pneumonia

Correct Answer: Scarlet fever ✔

Option A: Koch

Option B: Medintoff

Option C: John snow

Option D: Virchow

Correct Answer: Koch ✔

Option A: Pili

Option B: Cell Membrane

Option C: Its intracellular location

Option D: Cytolytic enzymes

Correct Answer: Pili ✔

Option A: Loefflers serum slope

Option B: Mc Conkey

Option C: Saborauds agar

Option D: Lowenstein Jensen Medium

Correct Answer: Loefflers serum slope ✔

1. Bacillus anthracis
2. Brucella species
3. Bordetelia pertussis
4. Clostridium weichii

Correct Answer: 3. Bordetelia pertussis ✔

Option A: Plague

Option B: Leprosy

Option C: Pemhigoid

Option D: Typhoid

Correct Answer: Typhoid ✔

Option A: Metachromatic granules

Option B: Refractile granules

Option C: Babes Ernst granules

Option D: Voluntin granules

Correct Answer: Refractile granules ✔

Option A: Hemoral immunity

Option B: Cell mediated immunity

Option C: Complement function

Option D: Phagocyte dysfunction

Correct Answer: Cell mediated immunity ✔

Option A: Strep. Mutans

Option B: Strep. pyogenes

Option C: Peptostreptococcus

Option D: Enterococcus

Correct Answer: Strep. Mutans ✔

Option A: Mannitol fermentation

Option B: Hemolysis of sheep erythrocytes

Option C: Detection of coagulase

Option D: The catalase test

Correct Answer: Detection of coagulase ✔

Option A: Unicellular

Option B: Free living

Option C: Having either DNA or RNA

Option D: Cell wall containing muramic acid

Correct Answer: Having either DNA or RNA ✔

Option A: Feaces

Option B: Blood

Option C: Urine

Option D: All of the above

Correct Answer: All of the above ✔

Option A: 2 degree

Option B: 0 degree

Option C: 27 degrees

Option D: 37 degrees

Correct Answer: 37 degrees ✔

Option A: Bacterial flagella

Option B: Spirochetes

Option C: Both of the above

Option D: None of the above

Correct Answer: Both of the above ✔

Option A: Blue color

Option B: Red color

Option C: Green

Option D: Colorless

Correct Answer: Red color ✔

Option A: Spleen

Option B: Gall Bladder

Option C: Liver

Option D: Salivary gland

Correct Answer: Gall Bladder ✔

Option A: Beta phage

Option B: Alfa phage

Option C: Lambda K12

Option D: Delta Phage

Correct Answer: Beta phage ✔

Option A: Mycobacterium bacilli

Option B: Treponema pallidum

Option C: Neisseria gonorrhea

Option D: All of the above

Correct Answer: Mycobacterium bacilli ✔

Option A: Diphtheria

Option B: Typhoid fever

Option C: Rheumatic fever

Option D: Syphilis

Correct Answer: Rheumatic fever ✔

Option A: Borrelia vincenti and fusobacterium fusiformis

Option B: Borrelia recurrents and bateroides

Option C: Borrelia burgoloferi and lactobacillus

Option D: Leptospira and Treponema pallidum

Correct Answer: Borrelia vincenti and fusobacterium fusiformis ✔

Option A: with a cell wall but free of a capsule

Option B: containing a cell wall and a capsule

Option C: Free of a cell wall and a capsule

Option D: Uniquely sensitive to penicillin

Correct Answer: Free of a cell wall and a capsule ✔

Option A: Psychrophiles

Option B: Mesophiles

Option C: Cryophiles

Option D: Thermophiles

Correct Answer: Mesophiles ✔

Option A: Widal test

Option B: Eleks test

Option C: Mantoux test

Option D: Wasserman test

Correct Answer: Widal test ✔

Option A: Pairs

Option B: Chains

Option C: Tetrads

Option D: Irregular clusters

Correct Answer: Irregular clusters ✔

Option A: Blood culture

Option B: Widal test

Option C: Stool culture

Option D: Urine culture

Correct Answer: Widal test ✔

Option A: Outer membrane proteins

Option B: IgA Protease

Option C: M-Proteins

Option D: Pili

Correct Answer: M-Proteins ✔

Option A: Conjugation

Option B: Rarefaction

Option C: Transduction

Option D: Transformation

Correct Answer: Conjugation ✔

Option A: FTAB

Option B: Widal test

Option C: Wasserman test

Option D: Kahn test

Correct Answer: FTAB ✔

Option A: Lag phase

Option B: Death phase

Option C: Stationary phase

Option D: Logarithmic phase

Correct Answer: Logarithmic phase ✔

Option A: Fimbria

Option B: Flagella

Option C: Capsule

Option D: Cell wall

Correct Answer: Flagella ✔

Option A: Produced by gram negative bacteria

Option B: Produced by gram positive bacteria

Option C: Not secreted outside the cell

Option D: Cannot be toxoided

Correct Answer: Produced by gram positive bacteria ✔

Option A: M protein

Option B: Pyrogenic exotoxin

Option C: Streptolysin 0

Option D: Carbohydrate cell wall

Correct Answer: Pyrogenic exotoxin ✔

Option A: Schick test

Option B: Dick test

Option C: Casoni’s test

Option D: Charles’ test

Correct Answer: Schick test ✔

Option A: cell wall

Option B: cell membrane

Option C: Nuclear material

Option D: Mesosomes

Correct Answer: cell wall ✔

Option A: VDRL

Option B: Kahn’s test

Option C: TPHA

Option D: Widal test

Correct Answer: TPHA ✔

Option A: It’s group of lactic acid production bacteria

Option B: Shows adherence to dental enamel

Option C: Most common in humans

Option D: Most common is animals

Correct Answer: A. It’s group of lactic acid production bacteria ✔

Option A: Budding

Option B: Binary fission

Option C: Sporing

Option D: Bacterial components produced by host cells

Correct Answer: Binary fission ✔