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Energy Flow and Enzymes
Energy Flow and Enzymes

Energy Flow and Enzymes: Close Your System Quiz

Think you’ve got your head wrapped around Energy Flow and Enzymes? Put your knowledge to the test. Good luck — the Stickman is counting on you!

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Q. Which of the following has the greatest entropy?


A bound book
Bowling pins before you throw the ball down the lane
People in line to buy concert tickets
Students sitting in class
Leaves fallen from trees on the ground
Q. Which of the following is not an example of an open system?


A sealed Coca Cola bottle
A lake
A park
Your body
Spaghetti
Q. An endergonic reaction will only proceed spontaneously if


it will always proceed spontaneously.
if ΔG < 0.
if it is coupled to an exergonic reaction such that the sum of both ΔGs is negative.
the entropy of the system is increased.
the entropy of the system is decreased.
Q. The change in entropy of a system plus the change in entropy of the surroundings is


always positive.
always negative.
always zero.
never zero.
positive, negative, or zero.
Q. If a spontaneous reaction increases the order of the system, what can be said about heat?


Heat must be absorbed by the system.
There is no change in heat in the reaction.
Knowing anything about heat isn’t really important.
Heat must be released from the system.
Heat makes the system very ordered.
Q. An atom that has been oxidized has


gained an electron.
lost an electron.
gained oxygen.
lost oxygen.
lost a proton.
Q. Which of the following determines the rate of an enzymatic reaction?


The concentration of products
The efficiency of the enzyme
The concentration of reactants
The temperature of the reaction
All of these answers are correct.
Q. At really low substrate concentrations,


a reaction is limited more by the amount of substrate than by its enzyme’s intrinsic properties.
a reaction is limited mostly by the enzyme's efficiency at catalyzing the reaction.
a reaction will never occur.
a reaction proceeds at its fastest rate.
ΔG is negative.
Q. An inhibitor that binds to the active site of an enzyme is called


a coenzyme.
a reactant.
a noncompetitive inhibitor.
a competitive inhibitor.
a substrate.
Q. If you drop your biology binder and the pages fly out, which fundamental law of physics helps explain why all the papers in your biology binder won’t stay in order?


The first law of thermodynamics
The second law of thermodynamics
Both the first and second law of thermodynamics
The third law of thermodynamics
The fourth law of thermodynamics

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