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  1. >>Class 11
  2. >>Biology
  3. >>Biomolecules
  4. >>Proteins
  5. >>Proteins

Proteins

Biology

definition

Proteins

  • Proteins are large chemical molecules containing carbon, hydrogen, oxygen and nitrogen and sometimes sulphur and phosphorus.
  • They are needed for growth and repair in the body.
  • Protein rich food include egg, cheese, beans, nuts, peas, fish etc.
  • Severe deficiency of protein causes Kwashiorkor and Marasmus.
LEARN WITH VIDEOS
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Introduction to Proteins
11 mins

Quick Summary With Stories

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Protein: Composition, Structure and Variety

3 mins

Important Questions

Which one is the most abundant protein in the animal world?

Medium
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Which of the following statements about the structure of proteins is true?

Medium
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Transamination is

Easy
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_____is the most abundant protein in animal world and ____is the most abundant protein in the whole biosphere.

Medium
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What are the functions of proteins?

Medium
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Name one element invariably found in proteins but not in all carbohydrates and lipids.

Medium
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Which of the following elements are present in all proteins?
1. Carbon
2. Hydrogen
3. Oxygen
4. Nitrogen
Select the correct answer from the codes given below.

Hard
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The contractile protein of skeletal muscle involving ATPase activity is

Medium
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Why are proteins considered to be heteropolymers?

Medium
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A peptide bond is found in which type of biological molecule

Medium
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