Respiration in Plants
ICSE · Class 11 · Biology
Summary of Respiration in Plants for ICSE Class 11 Biology. Key concepts, important points, and chapter overview.
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Cellular respiration is the release of energy from organic substances in a controlled way inside living cells. In plants, it supplies usable energy for growth, transport, movement, secretion, and the synthesis of cell materials. Respiration may be aerobic, using oxygen and occurring in mitochondria,
Key Concepts
Cellular respiration is an exothermic oxidative
Cellular respiration is an exothermic oxidative process in which the chemical energy of organic substances is converted into metabolically usable ener
Aerobic respiration requires molecular oxygen
Aerobic respiration requires molecular oxygen and occurs in mitochondria. Glucose is completely oxidised to carbon dioxide and water, and a large amou
Anaerobic respiration does not require oxygen
Anaerobic respiration does not require oxygen and is catalyzed by enzymes in the cytoplasm. In fermentation, glucose is broken down into ethanol and c
Glycolysis is a series of reactions
Glycolysis is a series of reactions in the cytoplasm in which glucose is converted into pyruvic acid. It does not require oxygen and is common to both
In the mitochondrial matrix
In the mitochondrial matrix, pyruvic acid undergoes oxidative decarboxylation to form acetyl CoA. This reaction needs five essential cofactors and pro
Learning Objectives
- Understand the meaning and importance of cellular respiration in plants
- Distinguish between aerobic and anaerobic respiration
- Describe glycolysis as the first step common to both types of respiration
- Explain the formation of acetyl CoA from pyruvic acid
- Outline the Krebs cycle and its main products
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