NURSING EXAM QUESTIONS
MICROBIOLOGY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Make bread dough rise & make yogurt
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Cramp your stomach & give you gas
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Make your hair shiny & clear up acne
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None of these
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Detailed explanation-1: -A yeast called Saccharomyces cerevisiae is mixed with sugar, flour and warm water to make bread. The yeast uses the sugar and the sugars present in the flour as its food. It breaks them down to provide the yeast with energy for growth. The yeast grows by budding.
Detailed explanation-2: -The yeasts cause the dough to rise by creating carbon dioxide bubbles, while the lactic acid bacteria provide the sour flavor (in the form of acetic acid and lactic acid) and preserve the bread by lowering its pH, which prevents the growth of food borne pathogens.
Detailed explanation-3: -Yeast is used to make bread. Yeast is a microbe which feeds on sugar. Enzymes in yeast ferment sugar forming carbon dioxide and ethanol.
Detailed explanation-4: -To cause the dough to rise and aerate by converting sugar to carbon dioxide gas. To condition and mellow the dough’s gluten to uniformly absorb and contain the expanding gases.