Question 1

Which of the following chemical reactions is a synthesis reaction?

Accepted Answer

A) AB + CD → AC + BD 
B) A + B → AB 
C) AB → A + B 
D) acid + base → salt + water 
E) none of the choices represents a synthesis reaction 
A) AB + CD → AC + BD 
B) A + B → AB 
C) AB → A + B 
D) acid + base → salt + water 
E) none of the choices represents a synthesis reaction

Question 2

Which of the following molecules contains the approximately 30,000 genes found in the cell's nucleus?

Accepted Answer

A) protein 
B) RNA 
C) DNA 
D) ATP 
E) glycogen 
A) protein 
B) RNA 
C) DNA 
D) ATP 
E) glycogen

Question 3

When two or more atoms share electrons, the resulting combination is called a/an

Accepted Answer

A) electrolyte 
B) ion 
C) element 
D) molecule 
E) salt 
A) electrolyte 
B) ion 
C) element 
D) molecule 
E) salt

Question 4

The building blocks of triglycerides are

Accepted Answer

A) fatty acids and glycerol 
B) cholesterol and glycerol 
C) monosaccharides 
D) amino acids 
E) fatty acids, glycerol and phosphate-containing group 
A) fatty acids and glycerol 
B) cholesterol and glycerol 
C) monosaccharides 
D) amino acids 
E) fatty acids, glycerol and phosphate-containing group

Question 5

Which of the following molecules has a structure described as a double helix?

Accepted Answer

A) mRNA 
B) tRNA 
C) rRNA 
D) DNA 
E) ATP 
A) mRNA 
B) tRNA 
C) rRNA 
D) DNA 
E) ATP

Question 6

Chemical elements present in high concentrations in the human body are called trace elements.

Accepted Answer

A) True 
 B)False

Question 7

If a dietary supplement is natural, then it is always safe.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following describes the most acidic solution?

Accepted Answer

A) pH 4 
B) pH 5 
C) pH 7 
D) pH 9 
E) pH 14 
A) pH 4 
B) pH 5 
C) pH 7 
D) pH 9 
E) pH 14

Question 9

Decomposition reactions involve the breaking of chemical bonds.

Accepted Answer

A) True 
 B)False

Question 10

Which property of water makes it important in the breakdown of organic chemicals like our nutrients?

Accepted Answer

A) Water requires a large amount of heat to change state. 
B) Water serves as a lubricant. 
C) Water releases heat very slowly. 
D) Water participates in chemical reactions. 
E) None of the choices is correct. 
A) Water requires a large amount of heat to change state. 
B) Water serves as a lubricant. 
C) Water releases heat very slowly. 
D) Water participates in chemical reactions. 
E) None of the choices is correct.

Question 11

What is the smallest complete unit of matter that retains the properties and characteristics of the element?

Accepted Answer

A) atom 
B) molecule 
C) proton 
D) neutron 
E) free radical 
A) atom 
B) molecule 
C) proton 
D) neutron 
E) free radical

Question 12

All of the following are organic compounds EXCEPT

Accepted Answer

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

Question 13

The two strands of DNA are held together by

Accepted Answer

A) peptide bonds between the nitrogenous bases. 
B) hydrogen bonds between complementary bases. 
C) ionic bonds between the phosphates. 
D) polar covalent bonds between the bases. 
E) glycosidic linkages between deoxyribose molecules. 
A) peptide bonds between the nitrogenous bases. 
B) hydrogen bonds between complementary bases. 
C) ionic bonds between the phosphates. 
D) polar covalent bonds between the bases. 
E) glycosidic linkages between deoxyribose molecules.

Question 14

What is the mass number of the atom labeled C in the figure?

Accepted Answer

A) 0 
B) -1 
C) 7 
D) 14 
E) 21 
A) 0 
B) -1 
C) 7 
D) 14 
E) 21

Question 15

A triglyceride that contains only single covalent bonds between the carbon atoms in its fatty acids is called a _____ fat.

Accepted Answer

The answer of A triglyceride that contains only single covalent...

Question 16

A chemical reaction in which a molecule is split apart by breaking chemical bonds is referred to as a/an _____ reaction.

Accepted Answer

The answer of A chemical reaction in which a molecule...

Question 17

A polysaccharide that serves as common storage form of energy in liver and muscle cells is called

Accepted Answer

A) fructose 
B) glycogen 
C) fat 
D) starch 
E) glycerol 
A) fructose 
B) glycogen 
C) fat 
D) starch 
E) glycerol

Question 18

All atoms of a specific element contain the same number of protons.

Accepted Answer

A) True 
 B)False

Question 19

Hydrogen atoms often lose an electron from the valence shell to form H+. In this ionic form, how many electrons are in the valence electron shell of hydrogen ion?

Accepted Answer

A) zero 
B) one 
C) two 
D) three 
E) four 
A) zero 
B) one 
C) two 
D) three 
E) four

Exam 2: Introductory Chemistry

Which of the following chemical reactions is a synthesis reaction?

Which of the following molecules contains the approximately 30,000 genes found in the cell's nucleus?

When two or more atoms share electrons, the resulting combination is called a/an

The building blocks of triglycerides are

Which of the following molecules has a structure described as a double helix?

Chemical elements present in high concentrations in the human body are called trace elements.

If a dietary supplement is natural, then it is always safe.

Which of the following describes the most acidic solution?

Decomposition reactions involve the breaking of chemical bonds.

Which property of water makes it important in the breakdown of organic chemicals like our nutrients?

What is the smallest complete unit of matter that retains the properties and characteristics of the element?

All of the following are organic compounds EXCEPT

The two strands of DNA are held together by

What is the mass number of the atom labeled C in the figure?

A triglyceride that contains only single covalent bonds between the carbon atoms in its fatty acids is called a _____ fat.

A chemical reaction in which a molecule is split apart by breaking chemical bonds is referred to as a/an _____ reaction.

A polysaccharide that serves as common storage form of energy in liver and muscle cells is called

All atoms of a specific element contain the same number of protons.

Hydrogen atoms often lose an electron from the valence shell to form H+. In this ionic form, how many electrons are in the valence electron shell of hydrogen ion?

Organization of the Human Body

Cells

Tissues

The Integumentary System

The Skeletal System

Joints

The Muscular System

Nervous Tissue

Central Nervous System, Spinal Nerves, and Cranial Nerves

Autonomic Nervous System

Somatic Senses and Special Sense

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive Systems

Development and Inheritance

Filters

Hydrogen atoms often lose an electron from the valence shell to form H⁺. In this ionic form, how many electrons are in the valence electron shell of hydrogen ion?