what is the function of the nucleus gcse
Most cells have: 1  A nucleus â controlling the activity of the cell. 2  All cells have these at one point. 3  Cytoplasm â where chemical reactions occur. 4  Inside the cytoplasm are enzymes which speed up these reactions. 5  A cell membrane â to control the passage of substances in and out of the cell.ost cells have: 1  A nucleus â controlling the activity of the cell. 2  Cytoplasm â where chemical reactions occur. 3  A cell membrane â to control the passage of substances in and out of the cell. 4  A Mitochondria which is where the energy is released from.