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Enzymes: “Helper” Protein molecules
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Chemical reactions of life
Processes of life ______________ molecules ______________ + +
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Nothing works without enzymes!
How important are enzymes? ____________________________________________________________________ building molecules ___________________ breaking down molecules __________________________________ “catalysts” enzyme + enzyme We can’t live without enzymes! +
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Examples __________________ + enzyme __________________ + enzyme
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Enzymes are proteins ________________________________________________________________________ each enzyme needs to be the ___________ for the job enzymes are named for the reaction they help ___________ breaks down ___________ ___________ breakdown ___________ ___________ builds ___________ Oh, I get it! They end in -ase
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Enzymes aren’t used up ____________________________________
used only temporarily re-used again for the same reaction with other molecules very little enzyme needed to help in many reactions ____________ ____________ ____________ ____________
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It’s shape that matters!
_______________________ ________________ allows enzyme & substrate to fit ______________ ______________ ______________ ______________
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1 2 3
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Enzyme vocabulary _________________ _________________________
helper protein molecule molecule that enzymes work on _________________________ what the enzyme helps produce from the reaction part of enzyme that substrate molecule fits into
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What affects enzyme action
_______________________________ correct order of amino acids _______________________
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Order of amino acids _______________________________________
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Temperature Effect on rates of enzyme activity
_________________________ greatest number of collisions between enzyme & substrate human enzymes = ___________________________________ _________________________________ molecules move slower decrease collisions
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Temperature What’s happening here?! reaction rate temperature
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pH Effect on rates of enzyme activity
____________________________________ depends on where in body pepsin (stomach) = pH 3 trypsin (small intestines) = pH 8
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pH stomach pepsin intestines trypsin reaction rate pH 1 2 3 4 5 6 7 8
What’s happening here?! reaction rate 1 2 3 4 5 6 7 8 9 10 11 12 13 14 pH
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For enzymes… What matters?
__________!
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