Fermentation is a metabolic process that is catalysed by enzymes, wherein organisms convert starch or sugar to alcohol or an acid anaerobically releasing energy. The science of fermentation is called “zymology”. It is an anaerobic biochemical process, wherein the first step is the same as cellular respiration, which is the formation of pyruvic acid by glycolysis where net 2 ATP molecules are synthesised. In the next step, pyruvate is reduced to lactic acid, ethanol or other products. Here NAD+ is formed which is re-utilized back in the glycolysis process.
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NEET MCQs on Fermentation PDF:-Download the PDF Here
1. Monascus purpureus is utilized in the production of
(a) citric acid
(b) ethanol
(c) statins
(d) streptokinase
Answer: (c)
2. The type of fermentation observed in yeasts is
(a) acrylic fermentation
(b) lactic acid fermentation
(c) pyruvic fermentation
(d) alcoholic fermentation
Answer: (d)
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3. In lactic acid fermentation, the final electron acceptor is:
(a) Lactic acid
(b) Pyruvate
(c) Oxygen
(d) NAD
Answer: (b)
4. Which of these is not a product of fermentation?
(a) Lactate
(b) Oxygen
(c) Carbon dioxide
(d) Ethanol
Answer: (b)
5. Which of the following is not a vegetable or fruit-based fermented product?
(a) Wine
(b) Sauerkraut
(c) Beer
(d) Vinegar
Answer: (d)
6. One of the most commonly used fermented cereal amongst these is
(a) Wheat
(b) Bread
(c) Rice
(d) Yoghurt
Answer: (b)
7. Glucose molecule during the process of glycolysis is broken down into
(a) Four pyruvic acid
(b) Three pyruvic acid
(c) Two pyruvic acid
(d) One pyruvic acid
Answer: (c)
8. Fermentation occurs in the
(a) presence of oxygen
(b) absence of oxygen
(c) presence of nitrogen
(d) presence of carbon
Answer: (b)
9. The least yield of ATP is observed in
(a) aerobic respiration
(b) anaerobic respiration
(c) fermentation
(d) same in (a), (b), and (c)
Answer: (c)
10. Anaerobic respiration by yeast produces
(a) CO2
(b) Wine and Beer
(c) Alcohol
(d) All of the above
Answer: (d)
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