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Chapter Summary

Nutrition — Chapter Summary

ICSE · Class 9 · Biology

Summary of Nutrition for ICSE Class 9 Biology. Key concepts: Nutrition is the supply, Carbohydrates are compounds and Glucose.

42 questions40 flashcards4 formulas & key relations5 concepts

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An infographic illustrating the six main purposes of nutrition for living organisms: growth, repair, energy, maintenance of chemical composition, provision of raw materials for secretions, and protect
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Overview

Nutrition is the supply of essential organic and inorganic chemical compounds such as proteins, vitamins, salts and water to the body. Food is any substance eaten or drunk that contains nutrients. A balanced diet contains all the principal constituents of food in proper quantity and supports growth,

Key Concepts

Nutrition is the supply of essential

Nutrition is the supply of essential chemical compounds to the body. Food is any substance eaten or drunk that contains nutrients. Diet is the combina

Carbohydrates are compounds of carbon

Carbohydrates are compounds of carbon, hydrogen and oxygen. They are the main energy-giving nutrients. Sugars, starch, cellulose and glycogen belong t

Glucose

Glucose, fructose and galactose are monosaccharides with general formula C6H12O6. Sucrose, maltose and lactose are disaccharides with general formula

Starch is an insoluble polysaccharide

Starch is an insoluble polysaccharide with formula (C6H10O5)n and is the storage form of carbohydrates in plants. Cellulose is found in plant cell wal

Cellulose is not digested in

Cellulose is not digested in the human body because there is no cellulose-digesting enzyme. It absorbs a lot of water, keeps faecal matter soft and he

Learning Objectives

  • Understand the meaning of nutrition, food, diet and balanced diet.
  • Identify the main classes of nutrients: carbohydrates, fats, proteins, mineral salts, vitamins and water.
  • Distinguish between monosaccharides, disaccharides and polysaccharides.
  • Explain the functions of roughage, water, fats, proteins, vitamins and mineral salts.
  • Describe malnutrition and the deficiency diseases Kwashiorkor and Marasmus.

Frequently Asked Questions

What are the important topics in Nutrition for ICSE Class 9 Biology?
Key topics in Nutrition include Basic ideas: nutrition, food, and diet, Classes of nutrients, Carbohydrates: sugars, starch, cellulose, and glycogen, Fats, proteins, and energy value. Study these first, then practise questions on each for Class 9 exams.
How should I revise Nutrition for Class 9 exams?
Learn the core ideas first, then work through the 42 practice questions on Nutrition. 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.

More resources for Nutrition

All ICSE Class 9 Biology Chapter Summary

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