Enzymes Helper Protein molecules Regents Biology 2009 2010
Enzymes: “Helper” Protein molecules Regents Biology 2009 -2010
Chemical reactions of life § Processes of life u _______ molecules § _______ u + _______ molecules § _______ Regents Biology +
Nothing works without enzymes! § How important are enzymes? u __________________________________ § building molecules w __________ § breaking down molecules w __________ We can’t live without enzymes! u enzyme + _________________ § “catalysts” Regents Biology
Examples § __________________ + enzyme Regents Biology
Enzymes are proteins § ____________________________________ each enzyme needs to be the ______ for the job u enzymes are named for the reaction they help u Oh, I get it! They end in -ase § § Regents Biology ______ breaks down ___________ breakdown ___________ builds ______
Enzymes aren’t used up § __________________ used only temporarily u re-used again for the same reaction with other molecules u very little enzyme needed to help in many reactions u ____________ Regents Biology ____________
It’s shape that matters! § ____________ u u ________ allows enzyme & substrate to fit ______________ Regents Biology
1 2 3 Regents Biology
Enzyme vocabulary § _________ u helper protein molecule § _________ u molecule that enzymes work on § _____________ u what the enzyme helps produce from the reaction § _________ u part of enzyme that substrate molecule fits into Regents Biology
What affects enzyme action § ________________ correct order of amino acids u ________________ u § _______________________ u _______________________________ Regents Biology
Order of amino acids § ____________________ Regents Biology
Temperature § Effect on rates of enzyme activity u _____________ § greatest number of collisions between enzyme & substrate § human enzymes = w __________________ § _________________ u _____________ § molecules move slower § decrease collisions u Regents Biology
Temperature reaction rate What’s happening here? ! temperature Regents Biology
p. H § Effect on rates of enzyme activity u ____________________________________ § depends on where in body § pepsin (stomach) = p. H 3 § trypsin (small intestines) = p. H 8 Regents Biology
p. H intestines trypsin What’s happening here? ! reaction rate stomach pepsin 0 Regents Biology 1 2 3 4 5 6 p. H 7 8 9 10 11 12 13 14
For enzymes… What matters? _____! Regents Biology 2009 -2010
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