Microbiology of Foods
Suspected colonies of Staphylococcus aureus when grown on Baird-Parker medium shall show

none of these
catalase activity
protease activity
coagulase activity

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

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