Microbiology of Foods
NaCl can act as

Both (a) and (b)
None of these
antagonist at optimal concentrations
synergistically if added in excess of optimum level

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Microbiology of Foods
Which of the following is true about ISO 2002 method for Salmonella detection?

XLD is the first isolation medium rather than BGA
Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn)
All of these
Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth

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Microbiology of Foods
Plate count of bacteria in foods generally use the plating medium consisting of

peptone, glucose, sodium chloride, agar and distilled water
peptone, yeast extract, glucose, sodium chloride and distilled water
yeast extract, glucose, sodium chloride, agar and distilled water
peptone, yeast extract, glucose, sodium chloride, agar and distilled water

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Microbiology of Foods
Which of the following is not true for the thermal resistance of the bacterial cells?

Bacteria that clump considerably or form capsules are difficult to kill
Cells low in lipid content are harder to kill than other cells
Cocci are usually more resistant than rods
Higher the optimal and maximal temperatures for growth, higher the resistance

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