B3- Molecules of Life

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  • Created by: Lauren
  • Created on: 20-12-12 11:38

Molecules of Life


Fundamental processes of life take place inside our cells. All cells contain the following:

  • Cytoplasm, where chemical reactions take place.
  • A cell membrane, which allows movement in and out of the cell.
  • A nucleus, which contains the genetic information and controls what the cell actually does.
  • Mitochondria- respiration takes place inside mitochondria, supplying energy for our cells. Cells that have a high energy requirement, e.g. sperm cells, muscle cells and liver cells, have large numbers of mitochondria.

Some structures are too small to see with a lght microscope, e.g. ribosomes. Ribosomes are in the cytoplasm and are the…


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