Question 1

A molecule or other agent that alters enzyme function by changing the enzyme's shape is called a(n):

Accepted Answer

A) cofactor. 
B) coenzyme. 
C) allosteric effector. 
D) proenzyme. 
A) cofactor. 
B) coenzyme. 
C) allosteric effector. 
D) proenzyme. C

Question 2

Match the name of each enzyme with its function or description.
-Involved in oxidation-reduction reactions

Accepted Answer

A) Hydrases 
B) Hydrolases 
C) Phosphorylating enzymes 
D) Mutases or isomerases 
E) Carboxylases or decarboxylases
F)Oxidases and hydrogenases 
A) Hydrases 
B) Hydrolases 
C) Phosphorylating enzymes 
D) Mutases or isomerases 
E) Carboxylases or decarboxylases
F)Oxidases and hydrogenases F

Question 3

Match the name of each enzyme with its function or description.
-Add or remove carbon dioxide

Accepted Answer

A) Hydrases 
B) Hydrolases 
C) Phosphorylating enzymes 
D) Mutases or isomerases 
E) Carboxylases or decarboxylases
F)Oxidases and hydrogenases 
A) Hydrases 
B) Hydrolases 
C) Phosphorylating enzymes 
D) Mutases or isomerases 
E) Carboxylases or decarboxylases
F)Oxidases and hydrogenases E

Question 4

The location at which the enzyme molecule binds to the substance it acts on is called the:

Accepted Answer

A) substrate. 
B) coenzyme. 
C) active site. 
D) cofactor. 
A) substrate. 
B) coenzyme. 
C) active site. 
D) cofactor.

Question 5

Because a living cell membrane can limit the diffusion of some substances by opening and closing channels, the membrane can be called selectively permeable.

Accepted Answer

A) True 
 B)False

Question 6

Match each term with its description.
-Describes a process that can take place without oxygen

Accepted Answer

A) Cytosol 
B) Citric acid cycle 
C) Pyruvate 
D) Acetyl coenzyme A 
E) NAD
F)Mitochondria
G)Lactate
H)Electron transport system
I)Anaerobic
J)Glycolysis 
A) Cytosol 
B) Citric acid cycle 
C) Pyruvate 
D) Acetyl coenzyme A 
E) NAD
F)Mitochondria
G)Lactate
H)Electron transport system
I)Anaerobic
J)Glycolysis

Question 7

If a cell were placed in a hypotonic solution:

Accepted Answer

A) there would be a net gain of water into the cell. 
B) there would be a net loss of water out of the cell. 
C) no water would move into or out of the cell. 
D) water would move into and out of the cell in equal amounts. 
A) there would be a net gain of water into the cell. 
B) there would be a net loss of water out of the cell. 
C) no water would move into or out of the cell. 
D) water would move into and out of the cell in equal amounts.

Question 8

Match each term with its description.
-Process also called the Krebs cycle

Accepted Answer

A) Cytosol 
B) Citric acid cycle 
C) Pyruvate 
D) Acetyl coenzyme A 
E) NAD
F)Mitochondria
G)Lactate
H)Electron transport system
I)Anaerobic
J)Glycolysis 
A) Cytosol 
B) Citric acid cycle 
C) Pyruvate 
D) Acetyl coenzyme A 
E) NAD
F)Mitochondria
G)Lactate
H)Electron transport system
I)Anaerobic
J)Glycolysis

Question 9

Phagocytosis and exocytosis are opposite processes.

Accepted Answer

A) True 
 B)False

Question 10

Activation energy is the amount of energy gained by the cell as a result of a catabolic pathway.

Accepted Answer

A) True 
 B)False

Question 11

The sodium-potassium pump in the cell membrane moves potassium into the cell and sodium out of the cell.

Accepted Answer

A) True 
 B)False

Question 12

Active transport processes that use protein carrier molecules, or pumps, do not use cellular energy but rely instead on concentration gradients.

Accepted Answer

A) True 
 B)False

Question 13

Molecules may move down their concentration gradient by passing through a membrane carrier.

Accepted Answer

A) True 
 B)False

Question 14

If a 20% glucose solution were separated from a 10% glucose solution by a permeable membrane:

Accepted Answer

A) glucose would move from the 20% solution to the 10% solution. 
B) water would move from the 10% solution to the 20% solution. 
C) water would move from the 20% solution to the 10% solution. 
D) both A and B would occur. 
A) glucose would move from the 20% solution to the 10% solution. 
B) water would move from the 10% solution to the 20% solution. 
C) water would move from the 20% solution to the 10% solution. 
D) both A and B would occur.

Question 15

The "lock-and-key" model of enzyme function explains how the protein and substrate join.

Accepted Answer

A) True 
 B)False

Question 16

Facilitated diffusion is a metabolically inexpensive process.

Accepted Answer

A) True 
 B)False

Question 17

For osmosis to occur there must be at least one impermeable solute present.

Accepted Answer

A) True 
 B)False

Question 18

Lactate is the result of glycolysis and is the substance that enters the citric acid cycle.

Accepted Answer

A) True 
 B)False

Question 19

Compare and contrast the processes of diffusion and osmosis.

Accepted Answer

Diffusion and osmosis are both processes

Question 20

Which factor can have an effect on the functioning of an enzyme?

Accepted Answer

A) Temperature 
B) pH 
C) An increase in the amount of end product produced by a reaction 
D) All of the above 
A) Temperature 
B) pH 
C) An increase in the amount of end product produced by a reaction 
D) All of the above

Exam 6: Cell Function

A molecule or other agent that alters enzyme function by changing the enzyme's shape is called a(n):

Match the name of each enzyme with its function or description. -Involved in oxidation-reduction reactions

Match the name of each enzyme with its function or description. -Add or remove carbon dioxide

The location at which the enzyme molecule binds to the substance it acts on is called the:

Because a living cell membrane can limit the diffusion of some substances by opening and closing channels, the membrane can be called selectively permeable.

Match each term with its description. -Describes a process that can take place without oxygen

If a cell were placed in a hypotonic solution:

Match each term with its description. -Process also called the Krebs cycle

Phagocytosis and exocytosis are opposite processes.

Activation energy is the amount of energy gained by the cell as a result of a catabolic pathway.

The sodium-potassium pump in the cell membrane moves potassium into the cell and sodium out of the cell.

Active transport processes that use protein carrier molecules, or pumps, do not use cellular energy but rely instead on concentration gradients.

Molecules may move down their concentration gradient by passing through a membrane carrier.

If a 20% glucose solution were separated from a 10% glucose solution by a permeable membrane:

The "lock-and-key" model of enzyme function explains how the protein and substrate join.

Facilitated diffusion is a metabolically inexpensive process.

For osmosis to occur there must be at least one impermeable solute present.

Lactate is the result of glycolysis and is the substance that enters the citric acid cycle.

Compare and contrast the processes of diffusion and osmosis.

Which factor can have an effect on the functioning of an enzyme?

Organization of the Body

Homeostasis

Chemistry of Life

Biomolecules

Cell Structure

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

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Autonomic Nervous System

General Senses

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Endocrine Regulation

Endocrine Glands

Blood

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Circulation of the Blood

Lymphatic System

Innate Immunity

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Stress

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Gas Exchange Transport

Upper Digestive Tract

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Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

Female Reproductive System

Growth, Development, and Aging

Genetics and Heredity

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