Site MapHelpFeedbackChapter Quiz
Chapter Quiz
(See related pages)



1

True or false. Energy comes in different forms, but cannot be converted from one form to another.
A)True
B)False
2

A calorie is the amount of energy required to raise the temperature of one ___________ of water __________ °C.
A)liter; 1
B)gram; 1
C)liter; 5
D)gram; 5
3

Most organisms ultimately obtain their energy from ____________.
A)the sun
B)geothermal energy
C)fossil fuels
D)the wind
4

Organisms that use inorganic molecules as the energy source for the manufacture of nutrient molecules are called ___________.
A)photoautotrophs
B)heterotrophs
C)chemoautotrophs
D)decomposers
5

__________________ energy is stored energy, available to do work.
A)Solar
B)Kinetic
C)Potential
D)None of these is correct.
6

True or false. The first law of thermodynamics states, in part, that energy cannot be created or destroyed.
A)True
B)False
7

The Second Law of Thermodynamics tells us that in all energy transformations, ______________.
A)entropy increases
B)some energy is lost as heat
C)events are irreversible
D)All of these are correct.
8

Metabolic pathways that produce large molecules from small ones are _____________.
A)catabolic
B)anabolic
C)degradative
D)digestive
9

The amount of energy stored in chemical bonds is referred to as the ___________ energy.
A)thermal
B)kinetic
C)bond
D)None of these is correct.
10

The amount of stored energy potentially available to form new bonds is the _____________ of the molecule.
A)free energy
B)kinetic energy
C)thermal energy
D)entropy
11

In a(n) ___________________, the products contain more energy than the reactants.
A)catabolic reaction
B)reversible reaction
C)endergonic reaction
D)exergonic reaction
12

True or false. At chemical equilibrium, energy is neither gained or lost.
A)True
B)False
13

In a reduction reaction electrons are ______________ by the atom that is reduced.
A)gained
B)lost
C)shared
D)repelled
14

True or false. Oxidation reactions are always coupled with reduction reactions.
A)True
B)False
15

At most, how many bonds of an ATP molecule can be broken to release energy?
A)1
B)2
C)3
D)4
16

Coupled reactions are advantageous to the cell because _______________.
A)only one enzyme is used
B)heat is needed to maintain homeostasis
C)ATP is not needed
D)one reaction is used to drive the other
17

True or false. The transfer of a phosphate group is called phosphorylation.
A)True
B)False
18

True or false. Cofactors are organic molecules that aid in metabolism by acting with substances to facilitate certain reactions.
A)True
B)False
19

_______________ is derived from niacin (vitamin B3).
A)ATP
B)NADP+
C)FAD
D)NAD+
20

True or false. NAD+ is reduced when it accepts two protons as well as two electrons from a substrate.
A)True
B)False
21

What iron-containing molecules transfer electrons in metabolic pathways?
A)coenzymes
B)cofactors
C)cytochromes
D)vitamins
22

What type of proteins lower the activation energy of a reaction?
A)enzymes
B)cofactors
C)steroids
D)polypeptides
23

True or false. Low temperatures increase enzyme activity.
A)True
B)False
24

True or false. Noncompetitive inhibition occurs when the active site of a regulatory enzyme is bound.
A)True
B)False







Life, 5/eOnline Learning Center with Powerweb

Home > Chapter 5 > Multiple Choice Quiz