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12. RESPIRATION IN PLANTS

The chapter discusses the process of respiration in plants, detailing how energy is obtained from food through cellular respiration, including glycolysis, fermentation, and aerobic respiration. It highlights the differences between anaerobic and aerobic pathways, the role of respiration in plants, and the importance of ATP in energy transfer. Additionally, the respiratory pathway is described as an amphibolic pathway that supports both catabolism and anabolism, with the respiratory quotient (RQ) illustrating the type of substrates used.

Sections

  • 12

    Respiration In Plants

    This section discusses how plants respire, the processes involved in cellular respiration, including glycolysis, fermentation, and aerobic respiration.

    Learning Practice

  • 12.1

    Do Plants Breathe?

    Plants breathe using stomata for gas exchange, allowing them to inhale oxygen and exhale carbon dioxide.

    Learning Practice

  • 12.2

    Glycolysis

    Glycolysis is the metabolic pathway where glucose is oxidized to produce energy in the form of ATP in cells.

    Learning Practice

  • 12.3

    Fermentation

    Fermentation is the anaerobic process by which pyruvic acid is converted into either lactic acid or ethanol and carbon dioxide, releasing a small amount of energy.

    Learning Practice

  • 12.4

    Aerobic Respiration

    Aerobic respiration is a metabolic process where pyruvate is completely oxidized in the mitochondria, resulting in the production of ATP, water, and carbon dioxide.

    Learning Practice

  • 12.4.1

    Tricarboxylic Acid Cycle

    The Tricarboxylic Acid (TCA) cycle, also known as the Krebs cycle, is a critical metabolic pathway that processes acetyl CoA to produce energy and metabolic intermediates.

    Learning Practice

  • 12.4.2

    Electron Transport System (Ets) And Oxidative Phosphorylation

    The Electron Transport System (ETS) enables the oxidation of NADH and FADH₂, producing ATP through oxidative phosphorylation.

    Learning Practice

  • 12.5

    The Respiratory Balance Sheet

    The respiratory balance sheet outlines the theoretical net ATP gain from the complete aerobic respiration of glucose.

    Learning Practice

  • 12.6

    Amphibolic Pathway

    The amphibolic pathway is a metabolic link that integrates both catabolic and anabolic processes, illustrating how various substrates can be utilized for energy production and synthesis within the respiratory pathway.

    Learning Practice

  • 12.7

    Respiratory Quotient

    The respiratory quotient (RQ) quantifies the relationship between carbon dioxide produced and oxygen consumed during respiration, varying by the type of substrate used.

    Learning Practice

  • 12.8

    Summary

    The section summarizes the key aspects of plant respiration, highlighting processes like glycolysis, fermentation, and aerobic respiration.

    Learning Practice

  • 12.9

    Exercises

    The exercises section tests the reader's understanding of respiration in plants, focusing on key processes like glycolysis, fermentation, aerobic respiration, and respiratory pathways.

    Learning Practice

References

NCERT Study Material

Class Notes

Memorization

What we have learnt

  • Plants respire and exchange...
  • The breakdown of glucose th...
  • Respiration can occur aerob...

Final Test

Revision Tests

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