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 how pyruvic acid is used in alcohol fermantation?

Tissues of higher plants can survive for few hours in the absence of Oxygen. This is known as anaerobiosis.

In the absence of oxygen, plants convert pyruvic acid to ethyl alcohol and CO2. This is known as alcoholic fermentation. It occurs in some fungi (yeast) and higher plants.

In alcoholic fermentation, breakdown of Pyruvic acid occurs in two steps.

  1. Pyruvic acid is decarboxylated to Acetaldehyde in the presence of the enzyme pyruvic acid decarboxylase.
  2. Then the Acetaldehyde is reduced to Ethyl alcohol by NADH  +  H + produced in glycolysis in the presence of the enzyme alcohol dehydragenase.

 

Various organisms catabolise pyruvic acid into various organic compounds depending upon the specific enzyme they process.

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1. in alcoholic fermentation, pyruvic acid first forms an intermediate known as acetaldehyde (also known as ethanal), releasing carbon dioxide in the process. an enzyme known as pyruvate decarboxylase is responsible for this. acetaldehyde is then converted into ethyl alcohol when hydrogen atoms from the coenzyme NADH is transferred to acetaldehyde by an enzyme known as alcohol dehydrogenase.


hope this helps =)

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 1. in alcoholic fermentation, pyruvic acid first forms an intermediate known asacetaldehyde (also known as ethanal), releasing carbon dioxide in the process. an enzyme known as pyruvate decarboxylase is responsible for this. acetaldehyde is then converted into ethyl alcohol when hydrogen atoms from the coenzyme NADH is transferred to acetaldehyde by an enzyme known as alcohol dehydrogenase.

2. in lactic acid fermentation, pyruvic acid is not changed into acetaldehyde by giving off carbon dioxide. that is the difference between the two processes. instead, hydrogen atoms are transferred directly to the pyruvic acid itself by an enzyme known as lactate dehydrogenase, thus forming lactic acid.

thubs up plzz!

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