The following reaction |
Exergonic because energy is being released |
A(n) _____ reaction occurs spontaneously. |
Exergonic |
Which of these reactions requires a net input of energy from its surroundings? |
Endergonic: The products of endergonic reactions have more potential energy than the reactants. |
In cells, what is usually the immediate source of energy for an endergonic reaction? |
ATP:The hydrolysis of ATP provides the energy needed for an endergonic reaction. |
The reaction ADP + P --> ATP is a(n) _____ reaction. |
Endergonic: Energy has been acquired from the surroundings. |
The energy for an endergonic reaction comes from a(n) _____ reaction. |
Exergonic: The energy released by an exergonic reaction can be used to drive an endergonic reaction. |
What is the fate of the phosphate group that is removed when ATP is converted to ADP? |
It is acquired by a reactant in an endergonic reaction. |
What is energy coupling? |
the use of energy released from an exergonic reaction to drive an endergonic reaction |
In general, enzymes are what kinds of molecules? |
Proteins |
Enzymes work by _____. |
reducing Ea |
An enzyme _____. |
Is an organic catalyst |
What name is given to the reactants in an enzymatically catalyzed reaction? |
Substrate |
As a result of its involvement in a reaction, an enzyme _____. |
is unchanged |
Energy is observed in two basic forms: potential and kinetic. Which of the following correctly matches these forms with a source of energy? |
Bonds are a form of potential energy because the energy arises from the relative positions of the atoms that form the bond. |
Enzymes are described as catalysts, which means that they _____. |
increase the rate of a reaction without being consumed by the reaction |