day 15 chemical reactions & enzymes€¦ · day 15. page 28 do now ‣ what are the 4...
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CHEMICAL REACTIONS & ENZYMES
DAY 15
PAGE 28
DO NOW‣ What are the 4 macromolecules?
‣ How are monomers and polymers related?
CHEMICAL REACTIONS & ENZYMES
PAGE 29 (CORNELL NOTES TITLE)
PAGE 29
CHEMICAL REACTIONS‣ Breaking or forming chemical bonds (ionic
and covalent)
‣ Changes substances into different substances
PAGE 29
REACTANTS‣ Substances changed during the chemical
reaction
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PRODUCTS‣ Substances made by the chemical
reaction
PAGE 29BOND ENERGY‣ Energy that will break a bond between
atoms
‣When bonds form, the same amount of energy needed to break the bond is released
PAGE 29
ACTIVATION ENERGY‣ Amount of energy that needs to be
absorbed to start a chemical reaction
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EXOTHERMIC‣ The chemical reaction releases more
energy than it absorbs (products have a higher bond energy than reactants)
‣ Given off as heat or light
PAGE 29
ENDOTHERMIC‣ The chemical reaction absorbs more
energy than it releases (products have a lower bond energy than reactants)
PAGE 29ENZYMES‣ Act as catalysts (decrease activation
energy)
‣ Increase the rate of reaction (but are not consumed in the reaction)
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SUBSTRATE‣ The reactants that enzymes act on
ILLUSTRATIVE SUMMARY (PAGE 28)ALL CONCEPTS COVERED TODAY 4 COLORS MINIMUM