Microbiology of Foods
Water activity can act as

an intrinsic factor determining the likelihood of microbial proliferation
an extrinsic factor
All of these
a processing factor

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

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