AnswersFL-2000310-Biology 1 Sem 1 - FlexCatalysts

Catalysts — Unit test Answers

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Which term describes an enzyme?

A
substrate
B
reactant
C
catalyst
D
product
2
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How does a catalyst work?

A
by increasing the temperature of a chemical reaction
B
by decreasing the pressure of a chemical reaction
C
by increasing the concentration of reactants in a reaction
D
by decreasing the activation energy of a reaction
3

Which is the best definition of activation energy?

A
the energy required to end a chemical reaction
B
the energy required to bind a substrate to an active site
C
the energy required to form or break the bonds of reactant molecules
D
the energy required to re-form bonds in product molecules
4

The lock-and-key mechanism refers to

A
the complementary shapes of an enzyme and a substrate.
B
the attractive forces between an enzyme and a substrate.
C
the ability of an enzyme to lower the activation energy of a reaction.
D
the ability of an enzyme to “unlock” the products of a reaction.
5

A student wants to create a liquid volcano. The student observes bubbles in the soft drink prior to opening it. The student first proceeds to open the soft drink bottle and place it on the floor.Next the student drops candy tablets into the drink at a continuous pace. The student notices a very powerful reaction in which the candies, still intact, are pushed out of the soda as the drink fizzes and starts to bubble.In this scenario, what would be the catalyst?

A
The candy tablets being added to the drink.
B
The gasses being released when the drink was first opened.
C
The liquid in the container.
D
The container that holds the liquid.

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