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[O] Pure Biology Smart Guides

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  1. I. PRINCIPLES OF BIOLOGY

    2. Cells
    2 Topics
  2. 3. Movement of Substances
    1 Topic
  3. 4. Nutrients
    4 Topics
  4. 5. Enzymes
    2 Topics
  5. II. MAINTENANCE AND REGULATION OF LIFE PROCESSES
    6. Nutrition in Humans
    4 Topics
  6. 7. Nutrition in Plants
    2 Topics
  7. 8. Transport in Humans
    5 Topics
  8. 9. Transport in Plants
    4 Topics
  9. 10. Respiration in Humans
    5 Topics
  10. 11. Excretion in Humans
    4 Topics
  11. 12. Homeostasis
    3 Topics
  12. 13. Nervous System
    2 Topics
  13. 14. Human Eye
    2 Topics
  14. 15. Hormones
    2 Topics
  15. III. CONTINUITY OF LIFE
    16. Cell Division
    3 Topics
  16. 17. Reproduction in Plants
    3 Topics
  17. 18. Reproduction in Humans
    5 Topics
  18. 19. Heredity
    6 Topics
  19. 20. Molecular Genetics
    2 Topics
  20. IV. MAN AND HIS ENVIRONMENT
    21. Ecology
    5 Topics
  21. 22. Our Impact on the Ecosystem
    2 Topics
[O] Pure Biology Smart Guides 4. Nutrients Fats
Chapter 3, Topic 4
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Fats

FortisLearn June 13, 2020
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Fats [CHO]
Fats contain much less oxygen in proportion to hydrogen.

Fats: a source and store of energy form the main part of cell membranes as an insulating material to prevent excessive heat loss (For eg, animals such as seals have a thick layer of fat beneath the skin which helps to reduce loss of body heat.)are a solvent for fat-soluble vitamins and some hormones help reduce water loss from skin surface (Glands in the skin secrete an oily substance. This oily substance forms a thin layer over the skin surface, reducing the rate of evaporation of water.)

Ethanol emulsion test(fats)

  1. Add 2 cm3 of ethanol to 2 cm3 of food sample in a test tube.
  2. Shake the contents of the tube vigorously.
  3. Add 3 cm3 of water into the test tube and shake the mixture.