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Question

Yeast is used in the production of


A

Alcohol

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B

Cake

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C

Bread

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D

All of the above

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Solution

The correct option is D

All of the above


Explanation for correct answer:

(d) All of the above

  • Yeasts are facultative anaerobes or obligate aerobes.
  • In presence of oxygen, it carries out cellular respiration of carbohydrate source to give CO2 and H2O which is useful in cake and bread preparation due to the release of CO2which helps cakes and breads to be spongy.
  • Yeast undergoes fermentation to give alcohol and CO2, which is useful in alcohol production.
  • The glucose is used as a substrate which gives pyruvate (via EMP pathway) which further undergoes reductive decarboxylation in absence of oxygen with the help of specific enzymes to give ethanol and CO2
  • Hence, yeast is used in the production of cakes, alcohol, and bread.
  • So this is the correct option

Explanation for incorrect options :

(a) Alcohol

  • Yeast is used in the production of cakes, alcohol, and bread.
  • This option states that yeast is only used in alcohol production.
  • So this cannot be the correct option

(b) Cake

  • Yeast is used in the production of cakes, alcohol, and bread.
  • This option states that cake is only used in alcohol production.
  • So this cannot be the correct option

(c ) Bread

  • Yeast is used in the production of cakes, alcohol, and bread.
  • This option states that bread is only used in alcohol production.
  • So this cannot be the correct option

The correct option is option (d) all of the above.


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