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Food microbiology exam questions and answers graded A+

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Food microbiology exam questions and answers graded A+

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Institution Food Microbiology

Course Food Microbiology

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Food microbiology exam questions and answers graded A+

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Food microbiology exam questions
and answers graded A+
Why eat fermented foods? - ANS✅✅Sensory changes (flavour and texture), extended shelf life,
improved digestibility, increased dietary value, safety, and therapeutic (probiotic)

What types of organisms can ferment food? - ANS✅✅Bacteria, fungi, can be from starter culture,
or natural microflora

Nutrients in food are converted during fermentation. What is produced? - ANS✅✅Organic
compounds, carbon dioxide, and a small amount of energy

How do fermentative organisms preserve food? - ANS✅✅Lactic acid and other compounds
produced inhibit spoilage bacteria and pathogens

What is the gram reaction of lactic acid bacteria? (LAB) - ANS✅✅Gram-positive

What oxygen levels do LAB (lactic acid bacteria) prefer? - ANS✅✅Low oxygen

How many genera of LAB are there? - ANS✅✅13

What do homofermentative lactic acid bacteria produce from glucose? - ANS✅✅Glucose ->
pyruvate -> lactate

What do heteromfermative Lactic acid bacteria product from glucose? - ANS✅✅Glucoses -> G6P -
> acetate, lactate, and ethanol

What is the gram reaction of acetic acid bacteria? - ANS✅✅Gram negative

Why is acetobacter important? - ANS✅✅It consumes ethanol to produce harsh tasting acetic acid
in beer

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Uploaded on: October 30, 2025
Number of pages: 2
Written in: 2025/2026
Type: Exam (elaborations)
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