Question 1

In this reaction,the reactant (s)are _____________ and the coenzyme NAD is ____________.

Accepted Answer

A) reduced; oxidized 
B) oxidized; oxidized 
C) reduced; reduced 
D) oxidized; reduced 
A) reduced; oxidized 
B) oxidized; oxidized 
C) reduced; reduced 
D) oxidized; reduced D

Question 2

A living organism represents stored energy in the form of chemical compounds.When an organism dies,what happens to this stored energy?

Accepted Answer

A) All chemicals immediately lose their high-energy bonds. 
B) All molecules immediately degrade into basic elements. 
C) All energy immediately leaves,and that is one manifestation that the organism is dead. 
D) The chemical compounds in cells lose their organization over time because there is no longer an input of energy to maintain the organized state. 
E) The chemical compounds remain exactly intact and ready to start up again unless digested by a consumer or decay organism. 
A) All chemicals immediately lose their high-energy bonds. 
B) All molecules immediately degrade into basic elements. 
C) All energy immediately leaves,and that is one manifestation that the organism is dead. 
D) The chemical compounds in cells lose their organization over time because there is no longer an input of energy to maintain the organized state. 
E) The chemical compounds remain exactly intact and ready to start up again unless digested by a consumer or decay organism. D

Question 3

The activity of an enzyme might be increased by all of the following except ________.

Accepted Answer

A) increase in substrate concentration 
B) a vitamin 
C) a 2-4 degree increase in temperature 
D) the presence of lead 
A) increase in substrate concentration 
B) a vitamin 
C) a 2-4 degree increase in temperature 
D) the presence of lead D

Question 4

What are the end products of photosynthesis?

Accepted Answer

A) glucose & oxygen 
B) glucose & ATP 
C) carbon dioxide & energy 
D) carbon dioxide & water 
A) glucose & oxygen 
B) glucose & ATP 
C) carbon dioxide & energy 
D) carbon dioxide & water

Question 5

Which best describes the first law of thermodynamics?

Accepted Answer

A) Energy is changed from one form to another with a loss of usable energy. 
B) Energy is not created nor destroyed,but it can change from one energy form to another. 
C) Energy can be created from matter or used to produce matter. 
D) Some useful energy is lost as heat whenever an energy transfer occurs. 
E) Energy transfers are always 100% efficient in changing energy from one useful form to another. 
A) Energy is changed from one form to another with a loss of usable energy. 
B) Energy is not created nor destroyed,but it can change from one energy form to another. 
C) Energy can be created from matter or used to produce matter. 
D) Some useful energy is lost as heat whenever an energy transfer occurs. 
E) Energy transfers are always 100% efficient in changing energy from one useful form to another.

Question 6

Which of the following is NOT a form of potential energy?

Accepted Answer

A) food 
B) water in a dam 
C) a muscle contracting 
D) All of the choices are not potential energy. 
A) food 
B) water in a dam 
C) a muscle contracting 
D) All of the choices are not potential energy.

Question 7

Feedback inhibition is the process that turns off an enzyme in a metabolic pathway as the result of inhibitory actions of a product of the pathway.

Accepted Answer

A) True 
 B)False

Question 8

Identify the graph that depicts the reaction C $\rightarrow$

Accepted Answer

A)    
B)    
C)    
A)    
B)    
C)

Question 9

__________ represents the first reactant of this metabolic pathway and ________ represents the endproduct (s)of the pathway?

Accepted Answer

A) A; E 
B) B; E and F 
C) A; E and F 
D) A and B; D and E 
A) A; E 
B) B; E and F 
C) A; E and F 
D) A and B; D and E

Question 10

What is the coenzyme used during the cellular respiration pathway to produce oxidation?

Accepted Answer

A) NAD+ 
B) NAD- 
C) NADP+ 
D) CO_ 
A) NAD+ 
B) NAD- 
C) NADP+ 
D) CO_

Question 11

Which organelles contain functioning ATP synthetase complexes in their membranes?

Accepted Answer

A) Golgi complexes and lysosomes. 
B) Mitochondria and chloroplasts. 
C) Endoplasmic reticulum and vesicles. 
D) Vacuoles and vesicles. 
E) Mitochondria and endoplasmic reticulum. 
A) Golgi complexes and lysosomes. 
B) Mitochondria and chloroplasts. 
C) Endoplasmic reticulum and vesicles. 
D) Vacuoles and vesicles. 
E) Mitochondria and endoplasmic reticulum.

Question 12

Which of the following conditions is in defiance of the Second Law of Thermodynamics?

Accepted Answer

A) As our body converts glucose into ATP some of the energy is given off in the form of heat. 
B) The temperature of your car's engine begins to increase as you drive to work. 
C) When we are cold our body shivers as a response to the decrease in body temperature. 
D) None of these are in defiance of the Second Law of Thermodynamics. 
A) As our body converts glucose into ATP some of the energy is given off in the form of heat. 
B) The temperature of your car's engine begins to increase as you drive to work. 
C) When we are cold our body shivers as a response to the decrease in body temperature. 
D) None of these are in defiance of the Second Law of Thermodynamics.

Question 13

While eating a container of yogurt,you have to leave,so you store the yogurt in the refrigerator.A day later you return and find the surface of the yogurt is no longer smooth but has broken into several liquified products.You correctly guess that enzymes from your saliva,via the spoon,have continued digesting the yogurt in your absence.What will happen over time?

Accepted Answer

A) The reaction will soon stop because the amount of saliva is small,and you would have to add more saliva to continue the degradation. 
B) The reaction will continue,since the enzyme is not denatured by the reaction. 
C) The reaction will continue until half is digested and then stop because the reaction between substrate and product will be balanced. 
D) Absolutely no degradation of the yogurt will occur naturally unless in the presence of this enzyme. In 
A) The reaction will soon stop because the amount of saliva is small,and you would have to add more saliva to continue the degradation. 
B) The reaction will continue,since the enzyme is not denatured by the reaction. 
C) The reaction will continue until half is digested and then stop because the reaction between substrate and product will be balanced. 
D) Absolutely no degradation of the yogurt will occur naturally unless in the presence of this enzyme. In

Question 14

Of the following,which process will not denature a protein?

Accepted Answer

A) heating to temperatures above 100 C 
B) addition of strong acids or strong bases 
C) phosphorylation 
D) addition of distilled water 
A) heating to temperatures above 100 C 
B) addition of strong acids or strong bases 
C) phosphorylation 
D) addition of distilled water

Question 15

The subunits from which ATP is made are:

Accepted Answer

A) ADP and phosphate. 
B) FAD and NAD+. 
C) FAD and NADPH. 
D) ADP and FAD. 
E) ADP and NAD+. 
A) ADP and phosphate. 
B) FAD and NAD+. 
C) FAD and NADPH. 
D) ADP and FAD. 
E) ADP and NAD+.

Question 16

A coenzyme is

Accepted Answer

A) an ionic cofactor that interacts with an enzyme to allow it to work. 
B) a protein cofactor that interacts with an enzyme to allow it to work. 
C) a nonprotein organic cofactor that interacts with an enzyme to allow it to work. 
D) an ionic cofactor that interacts with an enzyme to inhibit it. 
E) a protein cofactor that interacts with an enzyme to inhibit it. 
A) an ionic cofactor that interacts with an enzyme to allow it to work. 
B) a protein cofactor that interacts with an enzyme to allow it to work. 
C) a nonprotein organic cofactor that interacts with an enzyme to allow it to work. 
D) an ionic cofactor that interacts with an enzyme to inhibit it. 
E) a protein cofactor that interacts with an enzyme to inhibit it.

Question 17

Identify the missing substrate in the reaction that will oxidize NAD+.NAD+ + 2e + _____ = NADH

Accepted Answer

A) H+ 
B) 3H+ 
C) OH_ 
D) 2H+ 
A) H+ 
B) 3H+ 
C) OH_ 
D) 2H+

Question 18

Which statement is NOT true about enzyme inhibition?

Accepted Answer

A) In competitive inhibition,the inhibitor binds to the active site of the enzyme. 
B) In noncompetitive inhibition,the inhibitor binds to the allosteric site of the substrate. 
C) In irreversible inhibition,a poison binds to the enzyme so that it can never work again. 
D) Most inhibitors act in a reversible fashion. 
E) All of the statements are true. 
A) In competitive inhibition,the inhibitor binds to the active site of the enzyme. 
B) In noncompetitive inhibition,the inhibitor binds to the allosteric site of the substrate. 
C) In irreversible inhibition,a poison binds to the enzyme so that it can never work again. 
D) Most inhibitors act in a reversible fashion. 
E) All of the statements are true.

Question 19

In order to roll a rock down a hillside,you must first push it up out of the hole in which it rests.Pushing the rock is analogous to the energy of activation of a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 20

What establishes the electrochemical gradient across a membrane to provide energy for ATP production?

Accepted Answer

A) The chloroplast's electron transport system provides the ions. 
B) Hydrogen ions naturally collect on the outside of the organelle membrane. 
C) Hydrogen ions are pumped across the membrane by carrier proteins of the electron transport chain. 
D) All of the choices establish the electrochemical gradient. 
A) The chloroplast's electron transport system provides the ions. 
B) Hydrogen ions naturally collect on the outside of the organelle membrane. 
C) Hydrogen ions are pumped across the membrane by carrier proteins of the electron transport chain. 
D) All of the choices establish the electrochemical gradient.

Exam 6: Metabolism: Energy and Enzymes

In this reaction,the reactant (s)are _____________ and the coenzyme NAD is ____________.

A living organism represents stored energy in the form of chemical compounds.When an organism dies,what happens to this stored energy?

The activity of an enzyme might be increased by all of the following except ________.

What are the end products of photosynthesis?

Which best describes the first law of thermodynamics?

Which of the following is NOT a form of potential energy?

Feedback inhibition is the process that turns off an enzyme in a metabolic pathway as the result of inhibitory actions of a product of the pathway.

Identify the graph that depicts the reaction C →\rightarrow→

__________ represents the first reactant of this metabolic pathway and ________ represents the endproduct (s)of the pathway?

What is the coenzyme used during the cellular respiration pathway to produce oxidation?

Which organelles contain functioning ATP synthetase complexes in their membranes?

Which of the following conditions is in defiance of the Second Law of Thermodynamics?

Of the following,which process will not denature a protein?

The subunits from which ATP is made are:

A coenzyme is

Identify the missing substrate in the reaction that will oxidize NAD+.NAD+ + 2e + _____ = NADH

Which statement is NOT true about enzyme inhibition?

In order to roll a rock down a hillside,you must first push it up out of the hole in which it rests.Pushing the rock is analogous to the energy of activation of a chemical reaction.

What establishes the electrochemical gradient across a membrane to provide energy for ATP production?

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

In this reaction,the reactant (s)are _ and the coenzyme NAD is .

Identify the graph that depicts the reaction C $\rightarrow$

__ represents the first reactant of this metabolic pathway and represents the endproduct (s)of the pathway?

Identify the missing substrate in the reaction that will oxidize NAD⁺.NAD⁺ + 2e + _____ = NADH