Microbiology
Enterobacter can be differentiated from Klebsiella by

ornithine positivity
both (a) and (b)
motility
none of these

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Microbiology
Which of the following is true to prevent botulism from smoked fish?

The fish should be heated at its coolest part to at least 82°C for 30 min during or after smoking
Fish should be immediately frozen after packaging and kept frozen
All of these
Good sanitation should be maintained throughout production and handling

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Microbiology
Which statement is true about flavouring materials spices, garlic etc. added to Dill pickles?

These markedly stimulate or inhibit the acid forming bacteria
They may be source of considerable numbers of undesirable micro-organisms and cause off-fermentations or spoilage of pickles
None of these
They may improve texture of the pickle

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