Chapter 14 of 38
Revision Notes
Respiration in Plants — Revision Notes
NEET-UG · Biology
Free Respiration in Plants revision notes for NEET-UG Biology 2026 — key concepts, formulas, and definitions for quick revision.
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Key concepts, formulas, and definitions from Respiration in Plants for NEET-UG Biology preparation.
Key Topics to Revise
1
Introduction to Plant Respiration
- Respiration is an enzyme-controlled process of biological oxidation of food materials using molecular O₂
- It produces CO₂, H₂O, and releases energy in small steps, storing it as ATP
- Respiration is catabolic (breakdown), exothermic (releases heat), and oxidative (uses oxygen)
2
Respiratory Substrates and Types
- Respiratory substrates are organic compounds oxidized during respiration to release energy
- Primary substrates: Carbohydrates (glucose, fructose, starch) - first choice for energy
- Secondary substrates: Fats (fatty acids, glycerol) - used when carbohydrates are exhausted
3
Types of Respiration - Aerobic vs Anaerobic
- Aerobic respiration: Complete oxidation using oxygen, produces maximum ATP (38 molecules)
- Anaerobic respiration: Incomplete oxidation without oxygen, produces less ATP (2 molecules)
- Aerobic respiration occurs in cytoplasm (glycolysis) and mitochondria (Krebs cycle, ETC)
4
Glycolysis (EMP Pathway)
- Glycolysis occurs in cytoplasm and breaks one glucose (6C) into two pyruvate (3C) molecules
- Discovered by Embden, Meyerhof, and Parnas (EMP pathway)
- Consists of 10 enzymatic steps, does not require oxygen (anaerobic phase)
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Key Concepts
Cellular respiration is an enzymeDiscovered by EmbdenDiscovered by Hans Krebs (Nobel PrizeLocated in the inner mitochondrial membraneOccurs without oxygen when pyruvate
Frequently Asked Questions
What topics are covered in Respiration in Plants for NEET-UG?
Respiration in Plants is an important chapter in NEET-UG Biology. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Introduction to Plant Respiration, Respiratory Substrates and Types, Types of Respiration - Aerobic vs Anaerobic, Glycolysis (EMP Pathway).
How important is Respiration in Plants for NEET-UG?
Respiration in Plants is a frequently tested chapter in NEET-UG Biology. Questions from this chapter appear regularly in previous year papers. There are 68 practice questions available for this chapter.
How to prepare Respiration in Plants for NEET-UG?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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