B3 Revision Posters. B3a – Molecules of Life Controls movement in & out of cell Chemical reactions take place here – e.g. enzymes Site of respiration.
These structures are called Organelles.....they actually do work for the cell, by carrying out life functions.
Life in the Cosmos: Jan 2006 Life on Earth. Biology may be common in the Universe Evidence that organic molecules form easily and naturally Evidence that.
Cells
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