Enzyme Crossword

4. starting molecules in a chemical reaction that must collide in the correct orientation and with enough energy for the reaction to occur
6. the energy required to start a chemical reaction by breaking existing bonds
7. molecules that inhibit the activity of enzymes, reducing or stopping the enzyme from functioning
8. active site of an enzyme has a fixed shape and the substrate fits perfectly into it like a key in a lock
10. molecules formed after the chemical reaction takes place in an enzyme-catalysed reaction
11. sum of all the chemical reactions occurring in that cell
12. flexible active site that changes shape to fit the substrate as they bind together

1. chemical reaction that has a net release of free energy
2. organic cofactors such as vitamins or NAD⁺ that assist enzymes in functioning properly
3. reactions that break down large molecules into smaller ones
5. reaction that absorbs free energy from the surroundings
9. reactions that build large molecules from smaller ones