Explore topic-wise MCQs in Graduate Aptitude Test (GATE).

This section includes 44 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following capsular polysaccharides is used for preparing vaccine against meningococcal meningitis?
A. serovar A
B. serovar B
C. serovar C
D. serovar A and C
Answer» E.
Discussion
2.

 The organism causing whooping cough can grow on ordinary culture media.
A. True
B. False
Answer» C.
Discussion
3.

 Pontiac fever is a more severe disease than Legionnaires’ disease.
A. True
B. False
Answer» C.
Discussion
4.

 Which of the following antibiotics is most effective?
A. streptomycin
B. tetracycline
C. gentamicin
D. ampicillin
Answer» D. ampicillin
Discussion
5.

Which disease is caused by P. pseudomallei organism?
A. melioidosis
B. diarrhea
C. gastroenteritis
D. typhoid
Answer» B. diarrhea
Discussion
6.

 In which body part does the C. jejuni causes infection?
A. mouth
B. stomach
C. small and large intestine
D. limbs
Answer» D. limbs
Discussion
7.

Which of the following terms stand for damage to the spinal cord during tertiary stage of syphilis?
A. Lymphadenopathy
B. Malaise
C. Paresis
D. Tabes dorsalis
Answer» E.
Discussion
8.

Syphilis is caused by which of the following organism?
A. Treponema pallidum
B. Treponema pertenue
C. Treponema endemicum
D. Treponema carateum
Answer» B. Treponema pertenue
Discussion
9.

Which among the following species causes tuberculosis?
A. Mycobacterium leprae
B. Mycobacterium kansasii
C. Mycobacterium bovis
D. Mycobacterium ulcerans
Answer» D. Mycobacterium ulcerans
Discussion
10.

Schick Test is used for detection of which of the following disease?
A. Diphtheria
B. Tuberculosis
C. Erythrasma
D. Botulism
Answer» B. Tuberculosis
Discussion
11.

 Erythrasma is caused by which of the following microorganism?
A. Corynebacterium diphtheriae
B. Corynebacterium ulcerans
C. Corynebacterium minutissimum
D. Listeria monocytogenes
Answer» D. Listeria monocytogenes
Discussion
12.

Which of the following inactivates IgA antibodies?
A. Cord factor
B. Diphthin
C. Neuroaminidase
D. K antigens
Answer» C. Neuroaminidase
Discussion
13.

Toxin A involved in pseudomembranous colitis is a type of _______________
A. endotoxin
B. enterotoxin
C. cytotoxin
D. neurotoxin
Answer» C. cytotoxin
Discussion
14.

Patients with botulism are treated with monovalent antitoxin
A. True
B. False
Answer» C.
Discussion
15.

 Which serovar of C. botulinum occurs mainly in the sediments of the Great Lakes?
A. A
B. B
C. E
D. F
Answer» D. F
Discussion
16.

Which of the following temperature is suitable for multiplication of clostridia spores?
A. 109 to116 degree F
B. 100 degree F
C. -2 to 16 degree F
D. 30-40 degree F
Answer» B. 100 degree F
Discussion
17.

 What pressure of oxygen is used in the treatment involving the use of hyperbaric oxygen?
A. 1
B. 5
C. 100
D. 3
Answer» E.
Discussion
18.

__________________ is a hyaluronidase that may aid invasiveness of C.perfringens.
A. alpha toxin
B. theta toxin
C. µ toxin
D. √ toxin
Answer» D. √ toxin
Discussion
19.

Clostridium perfringens type A occurs as a natural flora of ______________
A. stomach
B. mouth
C. intestine
D. eyes
Answer» D. eyes
Discussion
20.

Booster immunizations should be given every 10 years.
A. True
B. False
Answer» B. False
Discussion
21.

Which of the following organisms produces neurotoxin as a virulence factor?
A. Bacillus anthracis
B. Clostridium tetani
C. Streptococcus pneumoniae
D. Staphylococcus aureus
Answer» C. Streptococcus pneumoniae
Discussion
22.

Which drug is used for treatment of anthrax?
A. erythromycin
B. penicillin
C. tetracycline
D. ampicillin
Answer» C. tetracycline
Discussion
23.

 Which of the following is a major virulence factor of Streptococcus pneumoniae?
A. polysaccharide capsule
B. M protein
C. streptolysin O
D. streptolysin S
Answer» B. M protein
Discussion
24.

 Puerperal fever is a streptococcal infection of the ______________
A. kidney
B. skin
C. uterus
D. heart
Answer» D. heart
Discussion
25.

Which of the following immunity is protective against infection by S.pyogenes?
A. cell-mediated immunity
B. antigen-antibody immunity
C. humoral immunity
D. no cure present
Answer» D. no cure present
Discussion
26.

Scarlet fever is similar to the pharyngitis in all respects.
A. True
B. False
Answer» C.
Discussion
27.

Which of the following microbe does not belong to Group D enterococci group?
A. S. faecalis
B. S. faecium
C. S. durans
D. S. bovis
Answer» E.
Discussion
28.

Streptococus pyogenes comprises which Lancefield group?
A. A
B. B
C. C
D. D
Answer» B. B
Discussion
29.

Antibiotics can easily reach the staphylococci.
A. True
B. False
Answer» C.
Discussion
30.

Which of the following microorganism causes lesions in the form of abscesses?
A. Staphylococcus aureus
B. Streptococcus pyogenes
C. Streptococcus pneumoniae
D. Clostridium perfringens
Answer» B. Streptococcus pyogenes
Discussion
31.

Which of the following toxins cause damage to the tissue cells by its phospholipase action?
A. alpha toxin
B. delta toxin
C. protein A
D. coagulase
Answer» C. protein A
Discussion
32.

Which of the following strains causes acute gastroenteritis in newborns and infants?
A. Enteropathogenic strains
B. Enteroinvasive strains
C. Enterotoxigenic strains
D. Both enteropathogenic and enterotoxigenic
Answer» B. Enteroinvasive strains
Discussion
33.

Thayer-Martin medium is used for isolation of organism for which disease?
A. diphtheria
B. meningococcal meningitis
C. gonorrhea
D. gastroenteritis
Answer» D. gastroenteritis
Discussion
34.

 Which of the following capsular polysaccharides is used for preparing vaccine against meningococcal meningitis?
A. serovar A
B. serovar B
C. serovar C
D. serovar A and C
Answer» E.
Discussion
35.

The organism causing whooping cough can grow on ordinary culture media.
A. True
B. False
Answer» C.
Discussion
36.

Which drug is used for treatment of brucellosis in humans?
A. Erythromycin
B. Tetracycline
C. Carbenicillin
D. Gentamicin
Answer» C. Carbenicillin
Discussion
37.

Which of the following microorganism occurs in swine?
A. Brucella melitensis
B. Brucella abortus
C. Brucella suis
D. Legionella pneumophila
Answer» D. Legionella pneumophila
Discussion
38.

Pontiac fever is a more severe disease than Legionnaires’ disease
A. True
B. False
Answer» C.
Discussion
39.

Which of the following antibiotics is most effective?
A. streptomycin
B. tetracycline
C. gentamicin
D. ampicillin
Answer» D. ampicillin
Discussion
40.

 Which disease is caused by P. pseudomallei organism?
A. melioidosis
B. diarrhea
C. gastroenteritis
D. typhoid
Answer» B. diarrhea
Discussion
41.

In which body part does the C. jejuni causes infection?
A. mouth
B. stomach
C. small and large intestine
D. limbs
Answer» D. limbs
Discussion
42.

Which of the following is a specific test for detecting antitreponemal antibodies?
A. VDRL
B. RPR
C. TPH
D. Widal Test
Answer» D. Widal Test
Discussion
43.

 Which of the following terms stand for damage to the spinal cord during tertiary stage of syphilis?
A. Lymphadenopathy
B. Malaise
C. Paresis
D. Tabes dorsalis
Answer» E.
Discussion
44.

 Syphilis is caused by which of the following organism?
A. Treponema pallidum
B. Treponema pertenue
C. Treponema endemicum
D. Treponema carateum
Answer» B. Treponema pertenue
Discussion