Microbiology of Foods
NaCl can act as

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

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Microbiology of Foods
Examination of the presence / absence of organisms refers to

None of these
incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
incubation of a food suspension in an enrichment medium
incubation of a food suspension in an enrichment medium followed by inoculation on to a non-selective medium.

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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
Higher the optimal and maximal temperatures for growth, higher the resistance
Cells low in lipid content are harder to kill than other cells
Cocci are usually more resistant than rods

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

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Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth

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