70.

71

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73.

74,

75.

76.

Mycobacterium tuberculosis is an intra cellular bacterium. It prefers to infect :

(A) Macrophages (0) 0-008
(ര T-cells (D) Neutrophil
Which of the following organism is widely used as biocontrol agent in organic farming?
(ಗ) Rhizobium tropieii (B) Trichoderma viride
(0 Fusarium oxysporum (D) Nostoc muscosum

Which of the following acid will have higher bacteriostatic effect at a given pH?
(ಗ) Maleic acid (B) Tartaric acid
(C) Citric acid (D) കുട്ട acid

If milk is left open lactose is fermented first to produce acid. This is followed by proteclytic
bacterial activity which increases the pH. Ultimately milk fats are degraded to produce
rancidity. This is example of :

(^) Ecological succession (B) Microbial antagonism
(C) Interference competition (D) Microevolution

Which is the best method for checking Mycoplasma contamination in mammalian cell line?
(வி Western hybridization (B) ELISA
(C) PCR (D) Southern hybridization

Plate count of bacteria in foods generally use the plating medium consisting of :
(A) peptone, yeast extract, glucose, sodium chloride and distilled water
(8) yeast extract, glucose, sodium chloride, agar and distilled water
(C) peptone, glucose, sodium chloride, agar and distilled water
(D) peptone, yeast extract, glucose, agar and distilled water

Which of the following is not true for the thermal resistance of the bacterial cells?
(ல) are usually more resistant than rods
(B) Higher the optimal and maximal temperatures for growth, higher the resistance
(¢) Bacteria that clump considerably or form capsules are difficult to kill
(D) Cells low in lipid content are harder to kill than other cells

The time temperature combination for HTST pasteurization of 71.1°C for 15 sec is selected ‏ده‎
‎the basis of :

(ಗಿ) Coxiella Burnettii (B) 8.000

(¢) B. Subtilis (0) Clostridium Botulinum

11 228/2015
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