Question 1

Match between columns
                        Premises: active site

Accepted Answer

The Answer of The energy needed to start a reaction, is...

Question 2

Figure 6.4
Answer the question by using the accompanying graph. The optimal pH for enzyme 2 is ____. ​

Accepted Answer

A) ​2 
B) ​3 
C) ​4 
D) ​7 
E) ​8 
A) ​2 
B) ​3 
C) ​4 
D) ​7 
E) ​8

Question 3

Match between columns
                        Premises: protein synthesis

Accepted Answer

The Answer of endergonic and exergonic and equilibrium is...

Question 4

What happens to an enzyme after it has catalyzed a reaction? ​

Accepted Answer

A) it is sent to the proteasome for degradation 
B) it is inactivated by phosphorylation 
C) it is inactivated by dephosphorylation 
D) it releases the cofactor to get a new one ready for catalysis 
E) it returns to its original state 
A) it is sent to the proteasome for degradation 
B) it is inactivated by phosphorylation 
C) it is inactivated by dephosphorylation 
D) it releases the cofactor to get a new one ready for catalysis 
E) it returns to its original state

Question 5

At equilibrium, the concentrations of the reactants equals that of the products.

Accepted Answer

A) True 
 B)False

Question 6

Match between columns
                        Premises: a reaction where D G is positive

Accepted Answer

The Answer of endergonic and equilibrium and exergonic is...

Question 7

Figure 6.2
Answer the question using the accompanying graph. Which portion of the graph shows the activation energy in the absence of enzyme? ​

Accepted Answer

A) ​A 
B) ​B 
C) ​C 
D) W + X 
E) Y + Z 
A) ​A 
B) ​B 
C) ​C 
D) W + X 
E) Y + Z

Question 8

During every energy transformation, it can be said that ____. ​

Accepted Answer

A) the entropy of the universe increases 
B) the entropy of the universe decreases 
C) there is an increase in the free energy of the universe 
D) there is a change in the total energy of the universe 
E) the system becomes more organized 
A) the entropy of the universe increases 
B) the entropy of the universe decreases 
C) there is an increase in the free energy of the universe 
D) there is a change in the total energy of the universe 
E) the system becomes more organized

Question 9

How do cells overcome the energy requirement of endergonic reactions? ​

Accepted Answer

A) coupling ATP synthesis with phosphorylation reactions 
B) coupling endergonic and exergonic reactions 
C) coupling endothermic and endergonic reactions 
D) coupling ATP transport with endergonic reactions 
E) coupling ATP synthesis with endergonic reactions 
A) coupling ATP synthesis with phosphorylation reactions 
B) coupling endergonic and exergonic reactions 
C) coupling endothermic and endergonic reactions 
D) coupling ATP transport with endergonic reactions 
E) coupling ATP synthesis with endergonic reactions

Question 10

What is the difference between cofactors and coenzymes? ​

Accepted Answer

A) cofactors are not necessary for enzyme function, but coenzymes are 
B) cofactors can be inorganic or organic, coenzymes are always inorganic 
C) cofactors can be inorganic or organic, coenzymes are organic cofactors 
D) cofactors are always vitamins, coenzymes are always ions 
E) cofactors help with essential metabolic reactions, coenzymes assist with nonessential metabolic reactions 
A) cofactors are not necessary for enzyme function, but coenzymes are 
B) cofactors can be inorganic or organic, coenzymes are always inorganic 
C) cofactors can be inorganic or organic, coenzymes are organic cofactors 
D) cofactors are always vitamins, coenzymes are always ions 
E) cofactors help with essential metabolic reactions, coenzymes assist with nonessential metabolic reactions

Question 11

The breakdown of glucose into carbon dioxide, water, and ATP is an example of a(n)____ pathway. ​

Accepted Answer

A) endergonic 
B) catabolic 
C) cyclical 
D) anabolic 
E) endothermic 
A) endergonic 
B) catabolic 
C) cyclical 
D) anabolic 
E) endothermic

Question 12

Enzymes ____. ​

Accepted Answer

A) change the rate of a reaction 
B) change the direction of a reaction 
C) change the free energy of a reaction 
D) are used up in a reaction 
E) are present in concentrations approaching their substrates' concentrations 
A) change the rate of a reaction 
B) change the direction of a reaction 
C) change the free energy of a reaction 
D) are used up in a reaction 
E) are present in concentrations approaching their substrates' concentrations

Question 13

Reactions that reach an equilibrium point are reversible . ​

Accepted Answer

A) True 
 B)False

Question 14

Match between columns
                        Premises: activation energy

Accepted Answer

The Answer of The energy needed to start a reaction, is...

Question 15

In molecules, the constant motion of the atoms is an example of ____ energy, while the arrangement of atoms and bonds is an example of ____ energy. ​

Accepted Answer

A) potential; chemical 
B) kinetic; potential 
C) potential; free 
D) chemical; free 
E) kinetic; chemical 
A) potential; chemical 
B) kinetic; potential 
C) potential; free 
D) chemical; free 
E) kinetic; chemical

Question 16

Which reaction is most likely to have more products than reactants when it reaches equilibrium? ​

Accepted Answer

A) D G = - 25 kcal/mol 
B) D G = - 50 kcal/mol 
C) D G = - 75 kcal/mol 
D) D G = - 100 kcal/mol 
E) They will all have the same ratio of products to reactants regardless of the D G value. 
A) D G = - 25 kcal/mol 
B) D G = - 50 kcal/mol 
C) D G = - 75 kcal/mol 
D) D G = - 100 kcal/mol 
E) They will all have the same ratio of products to reactants regardless of the D G value.

Question 17

Match between columns
                        Premises: transition state

Accepted Answer

The Answer of A substance that facilitates a chemical reaction is...

Question 18

If a reaction is spontaneous, then ΔG is ____ and the reaction is ____. ​

Accepted Answer

A) negative; endergonic 
B) negative; exergonic 
C) zero; endergonic 
D) positive; endergonic 
E) positive; exergonic 
A) negative; endergonic 
B) negative; exergonic 
C) zero; endergonic 
D) positive; endergonic 
E) positive; exergonic

Question 19

What is the optimum pH of most enzymes? ​

Accepted Answer

A) ​1 
B) ​3 
C) ​5 
D) ​7 
E) ​9 
A) ​1 
B) ​3 
C) ​5 
D) ​7 
E) ​9

Question 20

Enzymes alter the equilibrium point of a reaction.

Accepted Answer

A) True 
 B)False

Exam 6: Energy, Enzymes, and Biological Reactions

Figure 6.4 Answer the question by using the accompanying graph. The optimal pH for enzyme 2 is ____. ​

What happens to an enzyme after it has catalyzed a reaction? ​

At equilibrium, the concentrations of the reactants equals that of the products.

Figure 6.2 Answer the question using the accompanying graph. Which portion of the graph shows the activation energy in the absence of enzyme? ​

During every energy transformation, it can be said that ____. ​

How do cells overcome the energy requirement of endergonic reactions? ​

What is the difference between cofactors and coenzymes? ​

The breakdown of glucose into carbon dioxide, water, and ATP is an example of a(n)____ pathway. ​

Enzymes ____. ​

Reactions that reach an equilibrium point are reversible . ​

In molecules, the constant motion of the atoms is an example of ____ energy, while the arrangement of atoms and bonds is an example of ____ energy. ​

Which reaction is most likely to have more products than reactants when it reaches equilibrium? ​

If a reaction is spontaneous, then ΔG is ____ and the reaction is ____. ​

What is the optimum pH of most enzymes? ​

Enzymes alter the equilibrium point of a reaction.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

DNA Structure, Replication, and Organization

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Figure 6.4 Answer the question by using the accompanying graph. The optimal pH for enzyme 2 is ____.

What happens to an enzyme after it has catalyzed a reaction?

Figure 6.2 Answer the question using the accompanying graph. Which portion of the graph shows the activation energy in the absence of enzyme?

During every energy transformation, it can be said that ____.

How do cells overcome the energy requirement of endergonic reactions?

What is the difference between cofactors and coenzymes?

The breakdown of glucose into carbon dioxide, water, and ATP is an example of a(n)____ pathway.

Enzymes ____.

Reactions that reach an equilibrium point are reversible .

In molecules, the constant motion of the atoms is an example of energy, while the arrangement of atoms and bonds is an example of energy.

Which reaction is most likely to have more products than reactants when it reaches equilibrium?

If a reaction is spontaneous, then ΔG is and the reaction is .

What is the optimum pH of most enzymes?