44,

45.

46.

47.

48.

49.

50.

In bacterial growth curve, the phase in which the cell division comes to half due to depletion
of nutrients and accumulation of toxic substances is :

(A) Log phase ൯) Phase of decline
(C) Lag phase ൯) Stationary phase

The routine laboratory test which is done to differentiate Staphylococcus aureus from other
Staphylococci is :

(A) Catalase test (B) Coagulase test
(C) Oxidase test ൩) Urease test

Kovac’s reagent used in Indole test contains the following ingredients :

0) —Paradimethyl amino benzaldehyde
(ii) Con. HCL
(17) Amy] alcohol
(iv) Methyl red
(A) _ only (i) and (ii) (B) | only (i) and (iii)
(೮) _ only (i), Gi) and (iii) (7) ‏جلصہ‎ 0, Gii) and (iv)

A competitive binding assay in which fixed amounts of antibody and radiolabelled antigen
react in the presence of unlabelled antigen is :

(0) ELISA (B) RIA

(C) Complement fixation test (D) Immunofluorescence test

VDRL test for Syphillis is an example of :
(A) _ Slide flocculation test
൯) Tube flocculation test
(C) Ring test

(D) Immunodiffusion technique

The only maternal immunoglobulin that is normally transported across the placenta and
provides natural immunity to newborn is :

(A) IgA (8) IgM
(0 IgG 0) IgD

The bacterial colonies which shows ‘Medusa head’ appearance on agar plates and ‘Inverted fir
tree’ appearance in gelatin stab culture :

(A) Corynebacterium diphtheria (B)_ Bacillus anthracis

(೮) Pneumococci (D) Mycobacterium tuberculosis

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