[Bio 181] Mastering Biology - Chapter 10: Enzymes

Front 1

Which of these is exhibiting kinetic energy?

Back 1

A space station orbiting Earth

Front 2

"Conservation of energy" refers to the fact that _____

Back 2

Energy cannot be created or destroyed but can be converted from one form to another

Front 3

Chemical energy is a form of _____ energy.

Back 3

Potential

Front 4

In this reaction _____.

Back 4

The products have less potential energy than the reactants

Front 5

In this reaction _____.

Back 5

Heat has been released to the environment

Front 6

The following reaction A --> B + C + heatis a(n) _____ reaction.

Back 6

Exergonic

Front 7

A(n) _____ reaction occurs spontaneously.

Back 7

Exergonic

Front 8

Which of these reactions requires a net input of energy from its surroundings?

Back 8

Endergonic

Front 9

In cells, what is usually the immediate source of energy for an endergonic reaction?

Back 9

ATP

Front 10

The reaction ADP + P --> ATP is a(n) _____ reaction.

Back 10

Endergonic

Front 11

The energy for an endergonic reaction comes from a(n) _____ reaction.

Back 11

Exergonic

Front 12

What is the fate of the phosphate group that is removed when ATP is converted to ADP?

Back 12

It is acquired by a reactant in an endergonic reaction.

Front 13

This graph illustrates a(n) _____ reaction.

Back 13

Endergonic

Front 14

Select the INCORRECT association.

Back 14

Exergonic ... uphill

Front 15

What is energy coupling?

Back 15

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

Front 16

Which of these is ATP?

Back 16

Front 17

What type of reaction breaks the bonds that join the phosphate groups in an ATP molecule?

Back 17

Hydrolysis

Front 18

Rank these by reaction rate, as measured by the rate of product formation per unit time, from lowest reaction rate to highest reaction rate. To rank items as equivalent, overlap them.

Back 18

Front 19

Terms

Back 19

Front 20

In general, enzymes are what kinds of molecules?

Back 20

Proteins

Front 21

Enzymes work by _____.

Back 21

Reducing Eª

Front 22

An enzyme _____.

Back 22

Is an organic catalyst

Front 23

What name is given to the reactants in an enzymatically catalyzed reaction?

Back 23

Substrate

Front 24

As a result of its involvement in a reaction, an enzyme _____.

Back 24

Is unchanged

Front 25

Back 25

Energy of activation

Front 26

Which of the following statements is most likely to be true in the case of the feedback-regulated enzymatic pathway shown?

Back 26

P4 binds E1 and deactivates it.

Front 27

In which region does the reaction rate remain constant?

Back 27

Region C

Front 28

In which region is the enzyme saturated with substrate?

Back 28

Region C

Front 29

Consider a situation in which the enzyme is operating at optimum temperature and pH, and has been saturated with substrate. What is your best option for increasing the rate of the reaction?

Back 29

Increase the enzyme concentration.

Front 30

Terms #02

Back 30

Front 31

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?

Back 31

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

Front 32

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?

Back 32

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