2-4 Chemical Reactions and Enzymes

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Presentation transcript:

2-4 Chemical Reactions and Enzymes

Chemical Reactions Process of changing one set of chemicals into another set of chemicals Reactants (what enters a reaction) Products (what is produced) H2O + CO2 + sunlight → C6H12O6 + O2 5/3/2019

Activation Energy Activation energy – energy needed to get a reaction going 5/3/2019

Enzymes Catalyst – substance that speed up chemical reactions. Enzyme – Biological Catalyst. Used in cells to speed up chemical reactions. Cells use enzymes to speed up chemical reaction by lowering the amount of activation energy needed to get the reaction 5/3/2019

Chemical Reactions Activation energy – energy needed to get a reaction going. Energy-Absorbing Reaction Energy-Releasing Reaction Sugar + O2 Products Activation energy sunlight Sugar + O2 Activation energy CO2 + H20 Reactants CO2 + H2O Reactants Products Won’t occur without constant source of energy Occur spontaneously or with a little “boost” 5/3/2019

Enzyme Action Reactants (could be food you eat) Lock and key 5/3/2019

5/3/2019

https://www.youtube.com/watch?v=qgVFkRn8f10 5/3/2019

5/3/2019

Examples of Enzymes Amylase is responsible for the digestion of carbohydrates, amylase is an enzyme that breaks starch down into sugar. Lipase is responsible for breaking down lipids (fats) and the digestion of nutrients in the intestines. Pepsin breaks down the protein in the food into smaller particles called amino acids 5/3/2019