ENZYMES Elaine Liu and DurrEAjam Riaz Enzymes What

ENZYMES Elaine Liu and Durr-E-Ajam Riaz

Enzymes!!!! What Are Those? ? These are my proteins that act as catalysts for metabolic reactions

CHARACTERISTICS OF ENZYMES: Induced Fit Model describes how the enzyme works Substrate is the molecule that the enzyme acts upon Active Site is the pocket on enzyme where substrate binds 1) The substrate binds to the enzyme at the active site forming enzyme substrate complex. 2) The enzyme changes its shape and the reaction takes place 3) The product is released and the active site is open for other substrates

FACTORS THAT AFFECT ENZYME ACTIVITY TEMPERATURE p. H ENZYME CONCENTRATION SUBSTRATE CONCENTRATION

HOW ARE ENZYMES REGULATED? Inhibitor: substance that binds to an enzyme and decreases its activity competitive inhibitor - a substance that competes w/ substrates for the same active site of the enzyme and prevents the substrate from binding noncompetitive inhibitor - a substance binds to the enzyme in a location other than the active site which changes the enzyme to change its shape preventing the substrate from binding/ fitting. allosteric inhibitor - substance that binds to an allosteric site (chemical on/off switch) to ● activators - binds to allosteric sites and increase enzyme activity reduce enzyme activity ● enzyme cofactor - nonprotein molecules (organic)/ metal ions (inorganic) that assist enzyme function; necessary for proper functioning of enzyme

HOW ARE ENZYMES REGULATED?

QUESTIONS 1. TRUE OR FALSE a. Enzymes interact with a specific substrate b. Enzymes speed up reactions c. Enzyme reactions can be slowed or halted by using inhibitors d. Enzymes affect the reaction in living things by changing the temperature of the reaction

2. Choose the correct word a. Increasing the temperature [increases/decreases/does not change] the rate of reaction b. Introducing a competitive inhibitor [increases/decreases/does not change] the rate of reaction c. Change in p. H below the enzyme’s optimal level [increases/decreases/does not change] the rate of reaction

3. FILL IN the diagram and EXPLAIN how enzymes work !!!!

GET IT? HAHAHA