Biology

3. Organic molecules made up of the elements carbon, hydrogen, oxygen and nitrogen
5. Organic molecules made up of the elements carbon, hydrogen and oxygen
8. Organic molecules made up of the elements carbon, hydrogen and oxygen
9. The rhythmic, wave-like muscular contractions in the wall of the alimentary canal
10. The net movement of particles from a region of higher concentration to a region of lower concentration, down a concentration gradient
11. The substance on which the enzyme acts
14. A group of cells with similar structures which work together to perform a specific function
15. The process whereby some of the absorbed food substances are converted into new protoplasm or used to provide energy
17. Proteins that function as biological catalysts that can alter or speed up chemical reactions and remain chemically unchanged at the end of the reaction
18. The change in the three-dimensional structure of an enzyme, caused by heat or chemicals

1. The process whereby digested food substances are absorbed into the body cells
2. Reaction in which a water molecule is needed to break down a complex molecule into smaller molecules
4. The building blocks of life
5. A substance which can alter or speed up a chemical process, without itself being chemically changed at the end of the reaction
6. The process whereby red blood cells of the donor clump together in the recipient's body
7. The process of engulfing or ingesting foreign particles
12. The process by which amino groups are removed from amino acids and converted to urea
13. The process whereby large food molecules are broken down into smaller, soluble molecules to be absorbed into the body cells
16. The process whereby food is taken into the body
19. The net movement of water molecules from a solution of higher water potential to a solution of lower water potential, through a partially permeable membrane