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Syllabus

Respiration in Plants — Syllabus

CBSE · Class 11 · Biology

What Respiration in Plants covers in CBSE Class 11 Biology: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Biology syllabus.

99 questions80 flashcards5 concepts

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4 Topics · CBSE Class 11 Biology · 2026-27

Topics in Respiration in Plants

1

1. Respiration and Gas Exchange in Plants

  • Plants need oxygen for respiration and release carbon dioxide.
  • Plants do not have specialised respiratory organs, but stomata and lenticels help in gas exchange.
  • Gas exchange is easy in plants because most living cells are close to the surface.
2

2. Glycolysis

  • Glycolysis is the breakdown of glucose into two molecules of pyruvic acid.
  • It occurs in the cytoplasm and is present in all living organisms.
  • It is also called the EMP pathway, named after Gustav Embden, Otto Meyerhof, and J. Parnas.
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3. Fate of Pyruvic Acid

  • Pyruvic acid is the key end product of glycolysis.
  • Its fate depends on cellular need and oxygen availability.
  • There are three major ways cells handle pyruvic acid: lactic acid fermentation, alcoholic fermentation, and aerobic respiration.
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4. Aerobic Respiration and the TCA Cycle

  • Aerobic respiration is the complete oxidation of organic substances in the presence of oxygen.
  • It occurs in mitochondria in eukaryotes.
  • Pyruvic acid enters the mitochondrial matrix and undergoes oxidative decarboxylation to form acetyl CoA.

Key Concepts

Central concept: Respiration in Plants

Cellular respirationGas exchange in plantsGlycolysisFermentationAerobic respirationTricarboxylic acid cycleElectron transport systemRespiratory balance sheet

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Frequently Asked Questions

What are the important topics in Respiration in Plants for CBSE Class 11 Biology?
Key topics in Respiration in Plants include Respiration and Gas Exchange in Plants, Glycolysis, Fate of Pyruvic Acid, Aerobic Respiration and the TCA Cycle. Study these first, then practise questions on each for Class 11 exams.
How should I revise Respiration in Plants for Class 11 exams?
Learn the core ideas first, then work through the 99 practice questions on Respiration in Plants. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 11 Biology Syllabus

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