Question 1

True or False? The importance of O2 in the human body is to extract energy (ATP)from food molecules.

Accepted Answer

A) True 
 B)False

Question 2

A solution that contains one osmole of solute in one kilogram (kg)of water is called a

Accepted Answer

A) 1% solution. 
B) 1 molar solution. 
C) 10% solution. 
D) 1 osmolal solution. 
E) None of these choices are correct. 
A) 1% solution. 
B) 1 molar solution. 
C) 10% solution. 
D) 1 osmolal solution. 
E) None of these choices are correct.

Question 3

The mass of a chemical equal to its molecular weight in grams,containing 6.023 x 1023 molecules is a(n)

Accepted Answer

A)  atomic mass unit 
B)  ion 
C)  mole 
D)  molarity 
A)  atomic mass unit 
B)  ion 
C)  mole 
D)  molarity

Question 4

Deoxyribose is a sugar found in

Accepted Answer

A) RNA. 
B) DNA. 
C) glycogen. 
D) starch. 
E) ATP. 
A) RNA. 
B) DNA. 
C) glycogen. 
D) starch. 
E) ATP.

Question 5

The mass number of an atom is the number of

Accepted Answer

A) electrons plus neutrons in the atom. 
B) neutrons in the atom. 
C) neutrons plus protons in the atom. 
D) protons in the atom. 
E) protons plus electrons in the atom. 
A) electrons plus neutrons in the atom. 
B) neutrons in the atom. 
C) neutrons plus protons in the atom. 
D) protons in the atom. 
E) protons plus electrons in the atom.

Question 6

A base is a proton

Accepted Answer

A) donor. 
B) converter. 
C) acceptor. 
D) creator. 
E) Both acceptor and creator. 
A) donor. 
B) converter. 
C) acceptor. 
D) creator. 
E) Both acceptor and creator.

Question 7

The number of atoms in exactly 12 grams of carbon-12 is called

Accepted Answer

A) Socrates's number. 
B) Le Chatelier's number. 
C) Dalton's number. 
D) Avogadro's number. 
E) Pasteur's number. 
A) Socrates's number. 
B) Le Chatelier's number. 
C) Dalton's number. 
D) Avogadro's number. 
E) Pasteur's number.

Question 8

An atom has an atomic number of 19 and a mass number of 39.This atom will have

Accepted Answer

A) 19 neutrons. 
B) 39 neutrons. 
C) 20 electrons. 
D) 20 neutrons. 
E) 58 neutrons. 
A) 19 neutrons. 
B) 39 neutrons. 
C) 20 electrons. 
D) 20 neutrons. 
E) 58 neutrons.

Question 9

ATP

Accepted Answer

A) can be synthesized from ADP. 
B) stores and releases energy in the cell. 
C) is associated with a reversible reaction. 
D) is associated with anabolism and catabolism. 
E) All of these choices are correct. 
A) can be synthesized from ADP. 
B) stores and releases energy in the cell. 
C) is associated with a reversible reaction. 
D) is associated with anabolism and catabolism. 
E) All of these choices are correct.

Question 10

What is the building block molecule of a protein?

Accepted Answer

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

Question 11

Adjacent amino acids in a polypeptide chain are held together by

Accepted Answer

A) hydrogen bonds. 
B) high energy bonds. 
C) peptide bonds. 
D) Van der Waals bonds. 
E) ionic bonds. 
A) hydrogen bonds. 
B) high energy bonds. 
C) peptide bonds. 
D) Van der Waals bonds. 
E) ionic bonds.

Question 12

Chemical reactions with the property of being able to proceed from reactants to products and from products to reactants are called

Accepted Answer

A) synthesis reactions. 
B) decomposition reactions. 
C) exchange reactions. 
D) reversible reactions. 
E) net reaction rates. 
A) synthesis reactions. 
B) decomposition reactions. 
C) exchange reactions. 
D) reversible reactions. 
E) net reaction rates.

Question 13

In the reversible reaction,CO2 + H2O $\longleftrightarrow$ H2CO3 $\longleftrightarrow$ H+ + HCO3- ,a decrease in respiration rate will increase the concentration of CO2 in the blood.What will this do to the amount of H+ in the blood?

Accepted Answer

A) H+ will decrease. 
B) H+ will increase. 
C) H+ will be unchanged. 
A) H+ will decrease. 
B) H+ will increase. 
C) H+ will be unchanged.

Question 14

The minimum energy required to start a chemical reaction

Accepted Answer

A) can be lowered by enzymes. 
B) is elevated by a catalyst. 
C) moves in energy surges. 
D) comes from ionic energy motion. 
E) results from random molecular movement. 
A) can be lowered by enzymes. 
B) is elevated by a catalyst. 
C) moves in energy surges. 
D) comes from ionic energy motion. 
E) results from random molecular movement.

Question 15

The minimum amount of energy that reactants must have to start a chemical reaction is called

Accepted Answer

A) potential energy. 
B) mechanical energy. 
C) kinetic energy. 
D) activation energy. 
E) electromagnetic energy. 
A) potential energy. 
B) mechanical energy. 
C) kinetic energy. 
D) activation energy. 
E) electromagnetic energy.

Question 16

Reactions that use water to split molecules apart are called _______ reactions.

Accepted Answer

A) reversible 
B) synthesis 
C) oxidation 
D) dehydration 
E) hydrolysis 
A) reversible 
B) synthesis 
C) oxidation 
D) dehydration 
E) hydrolysis

Question 17

Eicosanoids

Accepted Answer

A) are structural proteins. 
B) comprise the genetic material. 
C) are components of the plasma membrane. 
D) play a role in the response of tissues to injuries. 
E) are fat-soluble vitamins. 
A) are structural proteins. 
B) comprise the genetic material. 
C) are components of the plasma membrane. 
D) play a role in the response of tissues to injuries. 
E) are fat-soluble vitamins.

Question 18

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male.What kind of bond is found at "A"?

Accepted Answer

A) hydrogen bond 
B) water molecule 
C) oxygen atom 
D) hydrogen atom 
E) polar covalent bond 
A) hydrogen bond 
B) water molecule 
C) oxygen atom 
D) hydrogen atom 
E) polar covalent bond

Question 19

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded.This reaction releases water.What type of reaction is this?

Accepted Answer

A)  monomeric 
B)  hydrolysis 
C)  catabolic 
D)  dehydration 
A)  monomeric 
B)  hydrolysis 
C)  catabolic 
D)  dehydration

Question 20

The three forms of matter are:

Accepted Answer

A) air,water,and solids. 
B) solids,liquids,and gases. 
C) blood,bone,and air. 
D) vapor,water,and solid. 
A) air,water,and solids. 
B) solids,liquids,and gases. 
C) blood,bone,and air. 
D) vapor,water,and solid.

Exam 2: The Chemical Basis of Life

True or False? The importance of O2 in the human body is to extract energy (ATP)from food molecules.

A solution that contains one osmole of solute in one kilogram (kg)of water is called a

The mass of a chemical equal to its molecular weight in grams,containing 6.023 x 1023 molecules is a(n)

Deoxyribose is a sugar found in

The mass number of an atom is the number of

A base is a proton

The number of atoms in exactly 12 grams of carbon-12 is called

An atom has an atomic number of 19 and a mass number of 39.This atom will have

ATP

What is the building block molecule of a protein?

Adjacent amino acids in a polypeptide chain are held together by

Chemical reactions with the property of being able to proceed from reactants to products and from products to reactants are called

In the reversible reaction,CO2 + H2O ⟷\longleftrightarrow⟷ H2CO3 ⟷\longleftrightarrow⟷ H+ + HCO3- ,a decrease in respiration rate will increase the concentration of CO2 in the blood.What will this do to the amount of H+ in the blood?

The minimum energy required to start a chemical reaction

The minimum amount of energy that reactants must have to start a chemical reaction is called

Reactions that use water to split molecules apart are called _______ reactions.

Eicosanoids

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male.What kind of bond is found at "A"?

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded.This reaction releases water.What type of reaction is this?

The three forms of matter are:

The Human Organism

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition,metabolism,and Temperature Regulation

Urinary System

Water,electrolyte,and Acid-Based Balance

Reproductive System

Development,growth,aging,and Genetics

Filters

True or False? The importance of O₂ in the human body is to extract energy (ATP)from food molecules.

The mass of a chemical equal to its molecular weight in grams,containing 6.023 x 10²³ molecules is a(n)

In the reversible reaction,CO₂ + H₂O $\longleftrightarrow$ H₂CO₃ $\longleftrightarrow$ H⁺ + HCO₃- ,a decrease in respiration rate will increase the concentration of CO₂ in the blood.What will this do to the amount of H⁺ in the blood?