Question 1

The primary structure of a protein consists of

Accepted Answer

A) alpha helices. 
B) beta-pleated sheets. 
C) three dimensional folded conformation. 
D) a sequence of amino acids linked by peptide bonds. 
E) the overall folded conformation of the protein's subunits. 
A) alpha helices. 
B) beta-pleated sheets. 
C) three dimensional folded conformation. 
D) a sequence of amino acids linked by peptide bonds. 
E) the overall folded conformation of the protein's subunits.

Question 2

Which of the following describes the major function of ATP in cells?

Accepted Answer

A) building block for the synthesis of proteins. 
B) transfers energy for cell functions 
C) transfers information for protein synthesis 
D) stores information for protein synthesis 
E) transports fluids 
A) building block for the synthesis of proteins. 
B) transfers energy for cell functions 
C) transfers information for protein synthesis 
D) stores information for protein synthesis 
E) transports fluids

Question 3

An atom or group of atoms with an unpaired electron in the outermost shell is called a(n)

Accepted Answer

A) compound. 
B) free radical. 
C) ion. 
D) molecule. 
A) compound. 
B) free radical. 
C) ion. 
D) molecule.

Question 4

A solution with a pH value less than 7 is

Accepted Answer

A) basic. 
B) neutral. 
C) acidic. 
D) alkaline. 
E) concentrated. 
A) basic. 
B) neutral. 
C) acidic. 
D) alkaline. 
E) concentrated.

Question 5

The initial energy "investment" needed to start a chemical reaction in a cell is called the

Accepted Answer

A) energy of products. 
B) energy of reactants. 
C) potential energy. 
D) Gibb's free energy. 
E) activation energy. 
A) energy of products. 
B) energy of reactants. 
C) potential energy. 
D) Gibb's free energy. 
E) activation energy.

Question 6

Which of the following describes the major significance of the element nitrogen in the human body?

Accepted Answer

A) ionized form makes body fluids acidic 
B) ionized form is most plentiful anion in extracellular fluid 
C) ionized form is needed for action of many enzymes 
D) is a component of all proteins and nucleic acids 
E) ionized form is most plentiful cation in extracellular fluid 
A) ionized form makes body fluids acidic 
B) ionized form is most plentiful anion in extracellular fluid 
C) ionized form is needed for action of many enzymes 
D) is a component of all proteins and nucleic acids 
E) ionized form is most plentiful cation in extracellular fluid

Question 7

In the diagram which particles are negatively charged?

Accepted Answer

A) A 
B) B 
C) C 
D) All of these choices. 
E) None of these choices. 
A) A 
B) B 
C) C 
D) All of these choices. 
E) None of these choices.

Question 8

Which of the following is a common function of RNA?

Accepted Answer

A) produce electrical impulses 
B) storage of energy 
C) transfer information for protein synthesis 
D) long-term storage of information for protein synthesis 
E) transport of fluids 
A) produce electrical impulses 
B) storage of energy 
C) transfer information for protein synthesis 
D) long-term storage of information for protein synthesis 
E) transport of fluids

Question 9

This type of fatty acid contains more than one double bond in its hydrocarbon chain.

Accepted Answer

A) saturated 
B) monounsaturated 
C) polyunsaturated 
D) volatile 
E) short chain 
A) saturated 
B) monounsaturated 
C) polyunsaturated 
D) volatile 
E) short chain

Question 10

Which relatively weak type of bond helps stabilize the three dimensional structure of large molecules like proteins and DNA?

Accepted Answer

A) nonpolar covalent 
B) polar covalent 
C) hydrogen 
D) ionic 
E) atomic 
A) nonpolar covalent 
B) polar covalent 
C) hydrogen 
D) ionic 
E) atomic

Question 11

This type of protein is involved with shortening of muscle cells to produce movement.

Accepted Answer

A) contractile 
B) structural 
C) regulatory 
D) catalytic 
E) transport 
A) contractile 
B) structural 
C) regulatory 
D) catalytic 
E) transport

Question 12

The chemical bonds formed between the atoms in a water molecule are called

Accepted Answer

A) nonpolar covalent bonds. 
B) polar covalent bonds. 
C) hydrogen bonds. 
D) ionic bonds. 
E) atomic bonds. 
A) nonpolar covalent bonds. 
B) polar covalent bonds. 
C) hydrogen bonds. 
D) ionic bonds. 
E) atomic bonds.

Question 13

Which of the following subatomic particles has a neutral charge?

Accepted Answer

A) neutron 
B) electron 
C) proton 
D) Both neutron and electron. 
E) All of these choices. 
A) neutron 
B) electron 
C) proton 
D) Both neutron and electron. 
E) All of these choices.

Question 14

Which of the following can lower the amount of free radicals in the body?

Accepted Answer

A) x-rays 
B) ultraviolet radiation 
C) oxygen 
D) carbon tetrachloride 
E) antioxidants 
A) x-rays 
B) ultraviolet radiation 
C) oxygen 
D) carbon tetrachloride 
E) antioxidants

Question 15

Which of the following describes the major significance of the element chlorine in the human body?

Accepted Answer

A) ionized form makes body fluids acidic 
B) ionized form is most plentiful anion in extracellular fluid 
C) forms backbone of all organic molecules 
D) required for bone and tooth structure 
E) ionized form is most plentiful cation in extracellular fluid 
A) ionized form makes body fluids acidic 
B) ionized form is most plentiful anion in extracellular fluid 
C) forms backbone of all organic molecules 
D) required for bone and tooth structure 
E) ionized form is most plentiful cation in extracellular fluid

Exam 2: The Chemical Level of Organization

The primary structure of a protein consists of

Which of the following describes the major function of ATP in cells?

An atom or group of atoms with an unpaired electron in the outermost shell is called a(n)

A solution with a pH value less than 7 is

The initial energy "investment" needed to start a chemical reaction in a cell is called the

Which of the following describes the major significance of the element nitrogen in the human body?

In the diagram which particles are negatively charged?

Which of the following is a common function of RNA?

This type of fatty acid contains more than one double bond in its hydrocarbon chain.

Which relatively weak type of bond helps stabilize the three dimensional structure of large molecules like proteins and DNA?

This type of protein is involved with shortening of muscle cells to produce movement.

The chemical bonds formed between the atoms in a water molecule are called

Which of the following subatomic particles has a neutral charge?

Which of the following can lower the amount of free radicals in the body?

Which of the following describes the major significance of the element chlorine in the human body?

An Introduction to the Human Body

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System Unit Ii: Principles of Support and Movement

The Skeletal System: Bone Tissue

The Skeletal System: the Axial Skeleton

The Skeletal System: the Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System Unit Iii: Control Systems of the Human Body

Nervous Tissue

The Spinal Cord and Spinal Nerves

The Brain and Cranial Nerves

The Autonomic Nervous System

Sensory, Motor and Integrative Systems

The Special Senses

The Endocrine System Unit Iv: Maintenance of the Human Body

The Cardiovascular System: the Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Hemodynamics

The Lymphatic System, Nonspecific Resistance to Disease, and Immunity

The Respiratory System

The Digestive System

Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Homeostasis Unit V: Continuity

The Reproductive Systems

Development and Inheritance

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