Question 1

The active site is a part of the

Accepted Answer

A)  enzyme. 
B)  inhibitor. 
C)  substrate. 
D)  end product. 
A)  enzyme. 
B)  inhibitor. 
C)  substrate. 
D)  end product. A

Question 2

As the concentration of an enzyme increases for a given substrate,

Accepted Answer

A)  the reaction rate increases similarly. 
B)  the turnover number decreases at the same rate that the enzyme concentration increases. 
C)  the rate of the reaction decreases to a point. 
D)  there is no change in the reaction. 
A)  the reaction rate increases similarly. 
B)  the turnover number decreases at the same rate that the enzyme concentration increases. 
C)  the rate of the reaction decreases to a point. 
D)  there is no change in the reaction. A

Question 3

The amount of energy needed to start two reactants to form a product is

Accepted Answer

A)  reaction energy. 
B)  kinetic energy. 
C)  activation energy. 
D)  potential energy. 
A)  reaction energy. 
B)  kinetic energy. 
C)  activation energy. 
D)  potential energy. C

Question 4

The substrate is

Accepted Answer

A)  the material changed by an enzyme. 
B)  a coenzyme. 
C)  the material formed by an enzyme. 
D)  always a protein. 
A)  the material changed by an enzyme. 
B)  a coenzyme. 
C)  the material formed by an enzyme. 
D)  always a protein.

Question 5

Enzymes belong to which group of organic molecules?

Accepted Answer

A)  carbohydrates 
B)  lipids 
C)  nucleic acids 
D)  proteins 
A)  carbohydrates 
B)  lipids 
C)  nucleic acids 
D)  proteins

Question 6

Anti-viral drugs used to control certain viruses work by

Accepted Answer

A)  causing the virus to replicate out of control 
B)  inhibiting the enzyme necessary for viral replication 
C)  making the virus more permeable to the drug 
D)  none of these 
A)  causing the virus to replicate out of control 
B)  inhibiting the enzyme necessary for viral replication 
C)  making the virus more permeable to the drug 
D)  none of these

Question 7

The reason why an enzyme fits a specific substrate is due to its

Accepted Answer

A)  inhibitor. 
B)  three-dimensional shape. 
C)  acid side chain. 
D)  nuclear membrane. 
A)  inhibitor. 
B)  three-dimensional shape. 
C)  acid side chain. 
D)  nuclear membrane.

Question 8

Enzymatic competition results when

Accepted Answer

A)  several substrates can combine with one enzyme. 
B)  one enzyme can bring about the formation of several substrates. 
C)  several types of enzymes can combine with a given substrate. 
D)  one enzyme can produce several types of products. 
A)  several substrates can combine with one enzyme. 
B)  one enzyme can bring about the formation of several substrates. 
C)  several types of enzymes can combine with a given substrate. 
D)  one enzyme can produce several types of products.

Question 9

NAD carries ____ to the electron transport system.

Accepted Answer

A)  energy 
B)  oxygen 
C)  hydrogen electrons 
D)  water 
A)  energy 
B)  oxygen 
C)  hydrogen electrons 
D)  water

Question 10

A given enzyme works on

Accepted Answer

A)  any number of different substrates. 
B)  one of two possible substrates. 
C)  no substrate. 
D)  one type of substrate. 
A)  any number of different substrates. 
B)  one of two possible substrates. 
C)  no substrate. 
D)  one type of substrate.

Question 11

The rate of an enzyme reaction is the

Accepted Answer

A)  optimum number. 
B)  substrate number. 
C)  turnover number. 
D)  activation number. 
A)  optimum number. 
B)  substrate number. 
C)  turnover number. 
D)  activation number.

Question 12

An enzyme can

Accepted Answer

A)  reduce the rate of a chemical reaction. 
B)  increase the rate of a chemical reaction as much as two times. 
C)  increase the rate of a chemical reaction as much as ten times. 
D)  increase the rate of a chemical reaction as much as several thousand times. 
A)  reduce the rate of a chemical reaction. 
B)  increase the rate of a chemical reaction as much as two times. 
C)  increase the rate of a chemical reaction as much as ten times. 
D)  increase the rate of a chemical reaction as much as several thousand times.

Question 13

If lipase breaks lipids into fatty acids and glycerol, then lipase can

Accepted Answer

A)  cause an additional breakdown of the fatty acid. 
B)  cause the formation of lipids. 
C)  work on amino acids. 
D)  denature proteins. 
A)  cause an additional breakdown of the fatty acid. 
B)  cause the formation of lipids. 
C)  work on amino acids. 
D)  denature proteins.

Question 14

The proton pump is the process of

Accepted Answer

A)  producing glyceraldehyde-3-phosphate in the stroma. 
B)  forming ATP by creating a hydrogen ion gradient across a membrane. 
C)  converting fats and proteins into carbohydrates. 
D)  cellular respiration in plants. 
A)  producing glyceraldehyde-3-phosphate in the stroma. 
B)  forming ATP by creating a hydrogen ion gradient across a membrane. 
C)  converting fats and proteins into carbohydrates. 
D)  cellular respiration in plants.

Question 15

Enzyme inhibition

Accepted Answer

A)  refers to the interference with a chemical reaction caused by an enzyme. 
B)  is the tendency to stop a chemical reaction caused by two different enzymes interfering with each other. 
C)  is caused by a chemical that prevents the enzyme from acting on the natural substrate. 
D)  is the ability of an enzyme to decrease the need for activation energy. 
A)  refers to the interference with a chemical reaction caused by an enzyme. 
B)  is the tendency to stop a chemical reaction caused by two different enzymes interfering with each other. 
C)  is caused by a chemical that prevents the enzyme from acting on the natural substrate. 
D)  is the ability of an enzyme to decrease the need for activation energy.

Question 16

Denature means to permanently change a(n)

Accepted Answer

A)  amino acid. 
B)  protein. 
C)  fat. 
D)  carbohydrate. 
A)  amino acid. 
B)  protein. 
C)  fat. 
D)  carbohydrate.

Question 17

In order for an enzyme to do its job, the substrate must fit into the

Accepted Answer

A)  coenzyme. 
B)  repressor site. 
C)  active site. 
D)  substrate complex. 
A)  coenzyme. 
B)  repressor site. 
C)  active site. 
D)  substrate complex.

Question 18

Enzymes are most directly involved with

Accepted Answer

A)  metabolic processes. 
B)  generative processes. 
C)  responsive processes. 
D)  control processes. 
A)  metabolic processes. 
B)  generative processes. 
C)  responsive processes. 
D)  control processes.

Question 19

A protein that increases the rate of a chemical reaction is

Accepted Answer

A)  a substrate. 
B)  a coenzyme. 
C)  an enzyme. 
D)  an inhibitor. 
A)  a substrate. 
B)  a coenzyme. 
C)  an enzyme. 
D)  an inhibitor.

Question 20

Which statement below is FALSE regarding this chemical equation? ADP + P $\rightarrow$ ATP

Accepted Answer

A)  This reaction is known as phosphorylation. 
B)  This reaction occurs in photosynthesis and cellular respiration. 
C)  This reaction represents energy being released into the environment for cellular use. 
D)  This reaction represents the formation of a high-energy phosphate bond. 
A)  This reaction is known as phosphorylation. 
B)  This reaction occurs in photosynthesis and cellular respiration. 
C)  This reaction represents energy being released into the environment for cellular use. 
D)  This reaction represents the formation of a high-energy phosphate bond.

Exam 5: Enzymes, Coenzymes, and Energy

The active site is a part of the

As the concentration of an enzyme increases for a given substrate,

The amount of energy needed to start two reactants to form a product is

The substrate is

Enzymes belong to which group of organic molecules?

Anti-viral drugs used to control certain viruses work by

The reason why an enzyme fits a specific substrate is due to its

Enzymatic competition results when

NAD carries ____ to the electron transport system.

A given enzyme works on

The rate of an enzyme reaction is the

An enzyme can

If lipase breaks lipids into fatty acids and glycerol, then lipase can

The proton pump is the process of

Enzyme inhibition

Denature means to permanently change a(n)

In order for an enzyme to do its job, the substrate must fit into the

Enzymes are most directly involved with

A protein that increases the rate of a chemical reaction is

Which statement below is FALSE regarding this chemical equation? ADP + P →\rightarrow→ ATP

What Is Biology

The Basics of Life: Chemistry

Organic Molecules: The Molecules of Life

Cell Structure and Function

Biochemical Pathways: Cellular Respiration

Biochemical Pathways: Photosynthesis

DNA and RNA: The Molecular Basis of Heredity

Cell Division: Proliferation and Reproduction

Patterns of Inheritance

Applications of Biotechnology

Diversity Within Species and Population Genetics

Evolution and Natural Selection

The Formation of Species and Evolutionary Change

Ecosystem Dynamics: The Flow of Energy and Matter

Community Interactions

Population Ecology

Evolutionary and Ecological Aspects of Behavior

The Origin of Life and the Evolution of Cells

The Classification and Evolution of Organisms

The Nature of Microorganisms

The Plant Kingdom

The Animal Kingdom

Materials Exchange in the Body

Nutrition: Food and Diet

The Bodys Control Mechanisms and Immunity

Human Reproduction, Sex, and Sexuality

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Which statement below is FALSE regarding this chemical equation? ADP + P $\rightarrow$ ATP