1) Catalyze means - a) to speed up b) to slow down c) to destroy d) to organize 2) Which structure represents the enzyme? a) A b) B c) C d) D 3) Which structure represents the substrate? a) A b) B c) C d) D 4) Using the picture, determine which molecules the enzyme would most likely affect in a reaction? a) B and D b) Only C c) Only A d) Molecules A and C 5) Complementary means -  a) when two things go together well b) when two things do not fit c) when two things break d) when something is not working well 6) Enzymes ______________ the speed of chemical reactions in cells a) decrease b) increase c) slow down d) do not change 7) Enzymes ________________ chemical reactions in cells a) speed up b) slow down c) do not impact d) stop 8) The part of the enzyme where the substrate binds a) substrate zone b) substrate site c) active site d) catalyst 9) The reactant molecule that an enzyme works on a) active site b) substrate c) catalyst d) nucleus 10) Substrate a) molecule that an enzyme works onactive site b) speeds up chemical reactions c) contains the DNA d) the active site 11) A substance that speeds up a chemical reaction without being changed a) catalyst b) active site c) nucleus d) substrate e) carbohydrate 12) A biological catalyst (usually a protein) a) catalyst b) active site c) nucleus d) substrate e) carbohydrate f) enzyme 13) Which structure represents the active site? a) A b) B c) C d) None of them

Enzymes Practice

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