Biology B2 Topic 2 2.0 / 5 based on 1 rating ? BiologyGCSEEdexcel Created by: annie lesantoCreated on: 21-04-13 11:28 Living things produce enzymes which act as... biological catalysts. 1 of 9 A catalyst is... a substance which increases the speed of a reaction without being changed or used up in the reaction. 2 of 9 Enzymes are all... proteins. 3 of 9 Enzymes work in the same way to... catalyse various reactions. 4 of 9 What is the 'active side' of an enzyme? the part where it joins on to its substance to catalyse the reaction. 5 of 9 What role do enzymes play in DNA replication? enzymes help copy a cell's DNA before it divides by mitosis or meiosis. 6 of 9 What role do enzymes play in protein synthesis? enzymes hold amino acids in place and form bonds between them. 7 of 9 What role do enzymes play in digestion? various enzymes are secreted into the gut to digest different food molecules. 8 of 9 What is a substrate in a chemical reaction? The substrate is the molecule changed in the reaction. (the thing that is either being split apart or joined together) 9 of 9
Comments
No comments have yet been made