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Enzyme & Buffer Lab

Test Description: Function of enzymes & buffers in different conditions.

Instructions: Answer all questions to get your test result.

1) Which of the following is NOT true about enzymes?

AHave ability to make or break bonds BMade out of amino acids CMade out of carbohydrates DHave a unique active site

2) How can changes in pH or temperature affect the enzymes?

AChange the shape and function of the enzyme BLower the activation energy CChanges in ph or temp do NOT affect enzyme function DRaise the activation energy

3) Enzymes can...

AAll the answers are correct Bspeed up reactions. Cmake bonds. Dbreak bonds.

4) Ezymes in the stomach break down...

AAcids BFats CProtein DCarbohydrates

5) What is the name of the stage when the reactant is bound to the enzyme?

AActive site BEnzyme-substrate complex CSimple sugars DComplex carbohydrate

6) How is enzyme function similar to a lock & key?

AEnzymes are reusable BEnzymes are uniquely matched to their substrate CEnzymes have a specific active site. DAll answers are correct

7) The primary function of buffers is to:

Aprevent dramatic changes in pH in an organisms Bincrease the effectiveness of enzymes Cslow down reactions Dspeed up reactions

8) When adding acid to a buffer, the line on the graph will

Aincrease slowly Bdecrease dramatically Cstay the same Ddecrease slowly

9) Why are buffers important to daily life?

AHelp organisms resist changes in pH BHelp ensure homeostasis CAll the answers are correct DHelp organisms maintain a relatively constant pH

10) A neutralization reaction occurs when:

AHydroxide ions & hydrogen ions balance out resulting in a pH of 7 BAcids lowers the pH of a solution CThe aqueous solution boils DAcids produce a salty solution

*select an answer for all questions

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