Microbiology of Foods
NaCl can act as

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

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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
Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth
All of these
Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn)

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Microbiology of Foods
Enumeration of microorganism refers to

None of these
either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar, or non-selective plate, depending on the test
non-selective plating, depending on the test
either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar

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

Higher the optimal and maximal temperatures for growth, higher the resistance
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

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