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P-2 Life Processes in Living Organisms Part – 1 — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-2 Life Processes in Living Organisms Part – 12 Marks
Question
Distinguish between: Glycolysis and TCA cycle
✓

Answer

Glycolysis:
  • The process of glycolysis occurs in the cytoplasm of the cell.
  • In glycolysis, one molecule of glucose is oxidized step-by-step to produce two molecules each of pyruvic acid, ATP, $NADH_2$ and water.
  • Glycolysis can take place in both aerobic and anaerobic respiration.
  • The first step in cellular respiration is glycolysis where glucose is converted into pyruvate.
  • Two molecules of pyruvate are obtained in glycolysis.
  • Two molecules of ATP are used up in glycolysis.
  • Four molecules of ATP are produced in glycolysis.
  • $CO2$ is not produced during glycolysis.
TCA cycle:
  • TCA cycle takes place in mitochondria.
    In TCA cycle, molecule of acetyl-co-A is completely oxidized and in the process $$ and ATP is produced.
  • TCA cycle takes place only during aerobic respiration.
  • The second step in cellular respiration is TCA cycle.
  • Pyruvate is converted into $CO_2$​​​​​​​ and $H_2O$ during TCA cycle.
  • ATP molecules are not used up in TCA cycle.
  • Two molecules of ATP are produced in TCA cycle.
  • $CO_2$ is produced in TCA cycle.

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