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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • The end product of glycolysis is

    Question: The end product of glycolysis is

    Options:

    Glucose
    Sucrose
    Pyruvic acid
    NADH

    ✅ Explanation: Glycolysis is the metabolic pathway that breaks down glucose into two molecules of pyruvate (pyruvic acid). This process occurs in the cytoplasm of the cell and generates a small amount of ATP and NADH, which are energy carriers.

    🔑Key Points :
    -An important feature of all living cells is respiration which is related to the liberation of metabolic energy as ATP.
    -Respiration is an amphibolic and exergonic cellular process.
    -Respiration is of two types.
    -Aerobic respiration- with the use of oxygen. Eg plants
    -Anaerobic respiration- without the use of oxygen. Eg yeast
    -Steps of aerobic respiration- Glycolysis, Krebs cycle, ETS.
    -The term glycolysis has originated from the Greek words, glycos for sugar, and lysis for splitting.
    -The scheme of glycolysis was given by Gustav Embden, Otto Meyerhof, and J. Parnas, and is often referred to as the EMP pathway.
    -In anaerobic organisms, it is the only process in respiration.
    -Glycolysis occurs in the cytoplasm of the cell and is present in all living organisms.
    -In this process of glycolysis, glucose undergoes partial oxidation to form two molecules of pyruvic acid.
    -In plants, this glucose is derived from sucrose, which is the end product of photosynthesis, or from storage carbohydrates.
    -Sucrose is converted into glucose and fructose by the enzyme, invertase, and these two monosaccharides readily enter the glycolytic pathway.
    -Glucose and fructose are phosphorylated to give rise to glucose-6- phosphate by the activity of the enzyme hexokinase.
    -This phosphorylated form of glucose then isomerizes to produce fructose-6- phosphate.
    -Subsequent steps of the metabolism of glucose and fructose are the same.
    -In glycolysis, a chain of ten reactions, under the control of different enzymes, takes place to produce pyruvate from glucose.

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