biology

A(n) _____ reaction occurs spontaneously. chemical endergonic kinetic anabolic exergonic

Exergonic (In exergonic reactions the products have less potential energy than the reactants.)

Select the INCORRECT association. potential energy ... positional energy kinetic energy ... motion exergonic ... uphill enzyme ... protein exergonic ... spontaneous

exergonic ... uphill

What is energy coupling? a barrier to the initiation of a reaction the use of energy released from an exergonic reaction to drive an endergonic reaction a description of the energetic relationship between the reactants and products in an exergonic reaction the use of an enzyme to reduce EA the hydrolysis of ATP to ADP + P

the use of energy released from an exergonic reaction to drive an endergonic reaction

Which of the following shows the correct changes in thermodynamic properties for a chemical reaction in which amino acids are linked to form a protein? −ΔH, −ΔS, +ΔG +ΔH, −ΔS, +ΔG +ΔH, +ΔS, +ΔG −ΔH, +ΔS, +ΔG +ΔH, −ΔS, −ΔG

+ΔH, −ΔS, +ΔG

In cells, what is usually the immediate source of energy for an endergonic reaction? ATP sugar as spontaneous reactions, endergonic reactions do not need an addition of energy ADP glucose

ATP (The hydrolysis of ATP provides the energy needed for an endergonic reaction.)

You have an enzymatic reaction proceeding at the optimum pH and optimum temperature. You add a competitive inhibitor to the reaction and notice that the reaction slows down. What can you do to speed the reaction up again? Add more inhibitor to speed up the reaction. Add more substrate; it will outcompete the inhibitor and increase the reaction rate. Increase the temperature. Increase the pH.

Add more substrate; it will outcompete the inhibitor and increase the reaction rate.

The reaction ADP + P --> ATP is a(n) _____ reaction. exergonic hydrolysis spontaneous endergonic chemical

Endergonic

Which of these reactions requires a net input of energy from its surroundings? catabolic endergonic exergonic hydrolysis ATP --> ADP + P

Endergonic (The products of endergonic reactions have more potential energy than the reactants.)

The energy for an endergonic reaction comes from a(n) _____ reaction. exergonic glucose + glucose --> maltose ADP + P --> ATP anabolic synthesis

Exergonic

The following reaction A --> B + C + heat is a(n) _____ reaction. exchange dehydration synthesis anabolic exergonic endergonic

Exergonic

What is the fate of the phosphate group that is removed when ATP is converted to ADP? It is acquired by a reactant in a spontaneous reaction. It is acquired by a reactant in an exergonic reaction. It is broken down into one phosphorus and four oxygen atoms. It is used to convert an ATP into an AQP. It is acquired by a reactant in an endergonic reaction.

It is acquired by a reactant in an endergonic reaction. (By acquiring the phosphate group the reactant acquires energy.)

You have added an irreversible inhibitor to a sample of enzyme and substrate. At this point, the reaction has stopped completely.What can you do to regain the activity of the enzyme? Removing the irreversible inhibitor should get the reaction working again. The enzyme is inactive at this point. New enzyme must be added to regain enzyme activity. Adding more substrate will increase the rate of reaction. Adding more inhibitor should get the reaction up to speed again.

The enzyme is inactive at this point. New enzyme must be added to regain enzyme activity.