Chemicals of life: biological molecules

Compounds of living organisms

A nutrient is a substance which is needed for growth, repair and metabolism.

The three main nutrients are:

  • carbohydrates
  • proteins
  • lipids (fats and oils)

Activity: pair work

1) Build a mind map of each of the biological molecules.


a-  Elements

b- Sources

c- Smallest molecules

d- Classification

e- Functions in the body

f- Food test (name only)


gcsebitesize webpage (pages 1-3)


– Textbook

– Mind map tools:


b- Coggle (log in with your Google account)

or feel free to choose yourself!

2)  Homework: Answer questions 1,2 and 4, page 48 in the book.

Good luck!


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