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In respiration pyruvic acid is
  • a)
    Formed only when oxygen is available
  • b)
    One of product of Krebs cycle
  • c)
    Broken down into Acetyl Co-A and CO2
  • d)
    a result of protein break down
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In respiration pyruvic acid isa)Formed only when oxygen is availableb)...
Respiration occurs in two stages. In the first stage called as glycolysis, which occurs in the absence of oxygen, one molecule of hexose glucose is broken down into two molecules of three carbon atom containing pyruvic acid. Each molecule of pyruvic acid is then oxidatively decarboxylated by the enzyme pyruvate dehydrogenase. The pyruvate dehydrogenase releases one molecule of carbon dioxide from each molecule of pyruvic acid during its conversion to Acetyl CoA. The Acetyl CoA is subsequently metabolised in Krebs cycle generating reduced coenzymes.
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In respiration pyruvic acid isa)Formed only when oxygen is availableb)...
Pyruvic acid is formed in both aerobic and anaerobic respiration. In anaerobic respiration, in some yeasts pyruvic acid is broken down into ethyl alcohol (2-carbon compound) and carbon dioxide. In aerobic respiration, pyruvic acid is converted into acetyl CoA through a gateway step or link reaction and enters the Krebs' cycle.
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In respiration pyruvic acid isa)Formed only when oxygen is availableb)...
Pyruvic acid is a 3'c' acid . it is the final product of glycolysis as a result of glucose metabolism in the cytoplasm. glycolysis takes place in the cytoplasm of all living organisms in the complete absence of oxygen. fate of pyruvate depends upon the availablity of oxygen (aerobic respiration) or non availability of oxygen (fermentation).for aerobic respiration pyruvic acid breaks down into acetyl coenzyme A(2 carbon compound)and co2. acetyl coenzyme A enters into kreb cycle (tricarboxylic acid cycle)for complete breakdown.
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In respiration pyruvic acid isa)Formed only when oxygen is availableb)One of product of Krebs cyclec)Broken down into Acetyl Co-A and CO2d)a result of protein break downCorrect answer is option 'C'. Can you explain this answer?
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