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Microbiology

Microbiology
Soft pickles are made so by pectolytic enzymes mostly from

none of these
moulds
yeasts
bacteria

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Microbiology
The gram-positive bacteria lack __________ structure/component?

plasma membrane
teichoic acid
murein
outer membrane

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Microbiology
Abnormal fermentation of cabbage may result in a cheese like odour caused by

butyric acid
propionic acid
all of these
caprioc acid and Valeric acid

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Microbiology
Which of the following property(ies), shown by the organisms belong(s) to the family Enterobacteriaceae?

They are catalase-positive
All of these
They ferment glucose
They are oxidase-negative

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Microbiology
Too long a fermentation of sauerkraut may favour the growth of

Lactobacillus lactis
Lactobacillus brevis
none of these
Bacillus subtilis

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Microbiology
Gram-positive bacteria, responsible for food poisoning, is/are

Mycoplasmas
Clostridia
Pseudomonas
all of these

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