EDEXCEL GCSE 9-1 COMBINED SCIENCE FOUNDATION BIOLOGY PAPER 1+2

1. millimetres (4, 2, 3, 6, 2, 0)
4. (present in the cytoplasm but not visible at this size ) : where proteins are made (protein synthesis) (9)
5. a large structure that contains genes that control the activities of the cell (7)

2. Diffusion is where a high concentration of dissolved molecules (concentrated solution) diffuses through a partially permeable membrane to a low concentration of dissolved molecules (dilute solution) (4, 2, 9)
3. jelly-like substance that fills the cell- many reactions take place here (9)
6. enzymes are biological catalysts that control reactions in the body (4, 3, 7, 0)
7. (single: mitochondrion): tiny structures where respiration takes place, releasing energy for cell processes (12)
8. Osmosis is the name given to a special case of diffusion. Osmosis is the net movement of water molecules across a partially permeable membrane from a low solute concentration to a high solute concentration (4, 2, 7)
9. controls what enters and leaves the cell (4, 8)

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