Question 1

A chemical that can conduct electrical current when dissolved in water is called a(n)

Accepted Answer

A) isotope. 
B) isomer. 
C) compound. 
D) electrolyte 
E) valence molecule. 
A) isotope. 
B) isomer. 
C) compound. 
D) electrolyte 
E) valence molecule. D

Question 2

Which of the following is NOT true about phospholipids?

Accepted Answer

A) They contain a glycerol backbone. 
B) The head group is polar. 
C) The molecule is an important part of cell membranes. 
D) The tail groups are nonpolar. 
E) They are a major form of energy storage. 
A) They contain a glycerol backbone. 
B) The head group is polar. 
C) The molecule is an important part of cell membranes. 
D) The tail groups are nonpolar. 
E) They are a major form of energy storage. E

Question 3

An enzyme acts to

Accepted Answer

A) raise the activation energy needed to start the reaction. 
B) lower the activation energy needed to start the reaction. 
C) convert the activation energy into potential energy. 
D) convert the activation energy into kinetic energy. 
E) stop a chemical reaction. 
A) raise the activation energy needed to start the reaction. 
B) lower the activation energy needed to start the reaction. 
C) convert the activation energy into potential energy. 
D) convert the activation energy into kinetic energy. 
E) stop a chemical reaction. B

Question 4

Which monomer is used to build RNA and DNA?

Accepted Answer

A) fatty acid 
B) amino acid 
C) monosaccharide 
D) glycerol 
E) nucleotide 
A) fatty acid 
B) amino acid 
C) monosaccharide 
D) glycerol 
E) nucleotide

Question 5

Which of the following subatomic particles are shared by two atoms to form covalent bonds?
1)neutron
2)electron
3)proton

Accepted Answer

A) 1 only 
B) 2 only 
C) 3 only 
D) 2 & 3 only 
E) 1,2 & 3 
A) 1 only 
B) 2 only 
C) 3 only 
D) 2 & 3 only 
E) 1,2 & 3

Question 6

In the diagram,what pH value represents an acidic solution?

Accepted Answer

A) 12 
B) 10 
C) 8 
D) 6 
E) None of these choices. 
A) 12 
B) 10 
C) 8 
D) 6 
E) None of these choices.

Question 7

Which of the following carbohydrates is a polysaccharide?

Accepted Answer

A) ribose 
B) lactose 
C) glycogen 
D) maltose 
E) galactose 
A) ribose 
B) lactose 
C) glycogen 
D) maltose 
E) galactose

Question 8

List the six major functions of proteins.

Accepted Answer

Proteins have 1)structural,2)r

Question 9

A triple covalent bond is formed between atoms sharing _____ valence electrons.

Accepted Answer

A) one 
B) two 
C) three 
D) six 
E) eight 
A) one 
B) two 
C) three 
D) six 
E) eight

Question 10

Describe a hydrogen bond.

Accepted Answer

Hydrogen bonds form between a

Question 11

Surface tension of an aqueous solution is generated by the presence of _____ between water molecules.

Accepted Answer

A) covalent bonds 
B) ionic bonds 
C) hydrogen bonds 
D) ester links 
E) None of these choices. 
A) covalent bonds 
B) ionic bonds 
C) hydrogen bonds 
D) ester links 
E) None of these choices.

Question 12

What is the most abundant and most important inorganic compound in the body?

Accepted Answer

A) water 
B) oxygen gas 
C) carbon dioxide 
D) glucose 
E) DNA 
A) water 
B) oxygen gas 
C) carbon dioxide 
D) glucose 
E) DNA

Question 13

What are the four major elements found in the chemicals that comprise the human body?

Accepted Answer

A) nitrogen,oxygen,calcium,sodium 
B) hydrogen,carbon,phosphorus,calcium 
C) carbon,hydrogen,oxygen and nitrogen 
D) oxygen,nitrogen,potassium,calcium 
E) potassium,phosphorus,sodium,hydrogen 
A) nitrogen,oxygen,calcium,sodium 
B) hydrogen,carbon,phosphorus,calcium 
C) carbon,hydrogen,oxygen and nitrogen 
D) oxygen,nitrogen,potassium,calcium 
E) potassium,phosphorus,sodium,hydrogen

Question 14

Which of the following substances has a pH closest to 7.0?

Accepted Answer

A) lye 
B) vaginal fluid 
C) gastric juice 
D) cerebrospinal fluid 
E) milk of magnesia 
A) lye 
B) vaginal fluid 
C) gastric juice 
D) cerebrospinal fluid 
E) milk of magnesia

Question 15

Which of the following is a general term used to refer to the sum of all the chemical reactions occurring in the body?

Accepted Answer

A) anabolism 
B) catabolism 
C) metabolism 
D) catalysis 
E) homeostasis 
A) anabolism 
B) catabolism 
C) metabolism 
D) catalysis 
E) homeostasis

Question 16

What region of an atom contains the protons and neutrons?

Accepted Answer

A) cloud 
B) nucleus 
C) element 
D) ring 
E) shell 
A) cloud 
B) nucleus 
C) element 
D) ring 
E) shell

Question 17

Which type of chemical reaction will absorb more energy than it releases?

Accepted Answer

A) exergonic 
B) endergonic 
C) potential 
D) kinetic 
E) activation 
A) exergonic 
B) endergonic 
C) potential 
D) kinetic 
E) activation

Question 18

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

Accepted Answer

A) ionized form makes body fluids acidic 
B) constituent of water 
C) forms backbone of all organic molecules 
D) required to harden the structure of bones and teeth 
E) ionized form is the part of hemoglobin that carries oxygen 
A) ionized form makes body fluids acidic 
B) constituent of water 
C) forms backbone of all organic molecules 
D) required to harden the structure of bones and teeth 
E) ionized form is the part of hemoglobin that carries oxygen

Question 19

This refers to a weighted average of the atomic weights of all naturally occurring isotopes of an element.

Accepted Answer

A) mass number 
B) atomic number 
C) atomic mass 
D) ionic mass 
E) covalent mass 
A) mass number 
B) atomic number 
C) atomic mass 
D) ionic mass 
E) covalent mass

Question 20

A solute that readily dissolves in water is

Accepted Answer

A) hydrophobic. 
B) hydrostatic. 
C) lipophilic. 
D) hydrophilic. 
E) hydrozone. 
A) hydrophobic. 
B) hydrostatic. 
C) lipophilic. 
D) hydrophilic. 
E) hydrozone.

Exam 2: The Chemical Level of Organization

A chemical that can conduct electrical current when dissolved in water is called a(n)

Which of the following is NOT true about phospholipids?

An enzyme acts to

Which monomer is used to build RNA and DNA?

Which of the following subatomic particles are shared by two atoms to form covalent bonds? 1)neutron 2)electron 3)proton

In the diagram,what pH value represents an acidic solution?

Which of the following carbohydrates is a polysaccharide?

List the six major functions of proteins.

A triple covalent bond is formed between atoms sharing _____ valence electrons.

Describe a hydrogen bond.

Surface tension of an aqueous solution is generated by the presence of _____ between water molecules.

What is the most abundant and most important inorganic compound in the body?

What are the four major elements found in the chemicals that comprise the human body?

Which of the following substances has a pH closest to 7.0?

Which of the following is a general term used to refer to the sum of all the chemical reactions occurring in the body?

What region of an atom contains the protons and neutrons?

Which type of chemical reaction will absorb more energy than it releases?

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

This refers to a weighted average of the atomic weights of all naturally occurring isotopes of an element.

A solute that readily dissolves in water is

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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