Enzyme & Buffer Lab: Question Preview (ID: 431)


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Which of the following is NOT true about enzymes?
a) Made out of carbohydrates b) Made out of amino acids c) Have a unique active site d) Have ability to make or break bonds
How can changes in pH or temperature affect the enzymes?
a) Lower the activation energy b) Change the shape and function of the enzyme c) Changes in ph or temp do NOT affect enzyme function d) Raise the activation energy
Enzymes can...
a) break bonds. b) make bonds. c) speed up reactions. d) All the answers are correct
Ezymes in the stomach break down...
a) Protein b) Carbohydrates c) Fats d) Acids
What is the name of the stage when the reactant is bound to the enzyme?
a) Simple sugars b) Complex carbohydrate c) Enzyme-substrate complex d) Active site
How is enzyme function similar to a lock & key?
a) Enzymes have a specific active site. b) Enzymes are uniquely matched to their substrate c) Enzymes are reusable d) All answers are correct
The primary function of buffers is to:
a) prevent dramatic changes in pH in an organisms b) speed up reactions c) increase the effectiveness of enzymes d) slow down reactions
When adding acid to a buffer, the line on the graph will
a) increase slowly b) stay the same c) decrease slowly d) decrease dramatically
Why are buffers important to daily life?
a) All the answers are correct b) Help organisms resist changes in pH c) Help ensure homeostasis d) Help organisms maintain a relatively constant pH
A neutralization reaction occurs when:
a) Hydroxide ions & hydrogen ions balance out resulting in a pH of 7 b) The aqueous solution boils c) Acids produce a salty solution d) Acids lowers the pH of a solution
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