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Across 1. A big Carbohydrate molecule which makes up plant and algal walls 6. The membrane around the contents of a cell which controls movement in to and out of cell (2 Words) 7. A measurement is considered this if it is judged to be closed to the true value 9. Passed on from parents to their offspring through genes 11. A group of different tissues working together to carry out a particular function 12. The green pigment contained in the chloroplasts 18. Enzyme which speeds up the breakdown of carbohydrates 19. A genetic condition inherited through a dominant allele which results in extra fingers and toes 22. Factor which limits the rate of a reaction, e.g. temperature, pH, light levels (2 Words) 25. Disease which is inherited (2 Words) 27. Washing detergent that contains enzymes (2 Words) 31. The site of aerobic cellular respiration in a cell 34. The process by which food molecules are broken down to release energy from the cellsSe 35. The cells of algae which can photysnthesis but are not plants (2 Words) 36. Allowing only certain substances to pass through (2 Words) 38. A substance that speeds up a chemical reaction without actively taking part 39. Reproduction which involves the joining (fusion) of male and female gametes producing genetic variety in the offspring (2 Words) 45. The site on an enzyme where the reactants bind (2 Words) 46. Specialisation for a particular function 47. The building blocks of proteins (2 Words) 49. A short section of DNA carrying genetic information 51. Where photosynthesis takes place in a plant cell 53. A simple sugar 54. Change in the genetic material of an organism 55. The diffusion of water molecules 56. An organelle found in many living cells containing the genetic information 57. A version of a particular gene

Down 2. A product of Anearobic respiration in animals cells (2 Words) 3. Female sex cells 4. Water-based gel where chemical reactions in a cell take place 5. Breaking down food without oxygen to release energy from cells (2 Words) 6. An individual who carries a certain allele 8. A single celled organism that can reproduce very rapidly. Useful, but can cause disease 10. Protein that acts as a biological catalyst 13. An enzyme which breaks down proteins 14. A genetic disease that affects the lungs, digestive and reproductive systems (2 Words) 15. The process by which plants make food using carbon dioxide, water and light energy 16. The extra oxygen that must be taken into the body after exercise has stopped to complete the aerobic respiration of lactic acid (2 Words) 17. Containing oxygen 20. A fat or oil 21. Enzyme which breaks down fats and oils into fats and oils in to fatty acids and glycerol 23. Sex cell which has half the chromosone number of an ordinary cell 24. Breaking down glucose using oxygen to release energy from the cells (2 Words) 26. A rigid structure which surrounds the cells of living organisms apart from animals (2 Words) 28. The cells which surround the stomata in the leaves of plants and control their opening and closing (2 Words) 29. The characteristic that will show in the offspring even if only one of the alleles is inherited 30. Building blocks of lipids (2 Words) 32. A group of organs working together to carry out a particular function (2 Words) 33. The movement if subtances against a concentration gradient and/or across a cell membrane using energy (2 Words) 37. Opening in leaves of plants which allow gases to enter and leave the leaf 40. A two-stage process of cell division which halves the number of daughter cells 41. Carries the genetic information found in the nucleus of a cell 42. The characteristic that will show up in the offspring only if both of the alleles are inherited 43. Change the shape of an enzyme so that it can no longer speed up a reaction 44. Net movement of particles from an area of high concentration to an area of low concentration 47. Name of the enzyme that speeds up the breakdown of starch in to simple sugars 48. Undifferentiated cell with the potential to form a wide variety of different cell types (2 Words) 50. A group of specialised cells all carrying out the same function 52. Offspring which is genetically identical to the parent