Question 1

Which of the following organic groups does hemoglobin belong to?

Accepted Answer

A) nucleic acid 
B) vitamin 
C) lipid 
D) protein 
E) carbohydrate 
A) nucleic acid 
B) vitamin 
C) lipid 
D) protein 
E) carbohydrate

Question 2

-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 "B"?

Accepted Answer

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

Question 3

What molecule is produced as a waste product of the metabolism of glucose by cells?

Accepted Answer

A) water 
B) oxygen 
C) carbon monoxide 
D) nitrogen 
E) carbon dioxide 
A) water 
B) oxygen 
C) carbon monoxide 
D) nitrogen 
E) carbon dioxide

Question 4

-The sodium chloride molecule breaks apart in water.What does "B" represent?

Accepted Answer

A) chloride ion 
B) dissociation 
C) water molecule 
D) sodium ion 
E) salt crystal 
A) chloride ion 
B) dissociation 
C) water molecule 
D) sodium ion 
E) salt crystal

Question 5

A neutral atom contains

Accepted Answer

A) more protons than electrons. 
B) more electrons than protons. 
C) the same number of electrons and protons. 
D) only neutrons. 
E) None of these choices is correct. 
A) more protons than electrons. 
B) more electrons than protons. 
C) the same number of electrons and protons. 
D) only neutrons. 
E) None of these choices is correct.

Question 6

Which of the following statements best describes RNA?

Accepted Answer

A) RNA is a double helix. 
B) RNA is a single-stranded molecule. 
C) RNA molecules are antiparallel. 
D) RNA contains the base thymine. 
E) RNA is found outside a cell. 
A) RNA is a double helix. 
B) RNA is a single-stranded molecule. 
C) RNA molecules are antiparallel. 
D) RNA contains the base thymine. 
E) RNA is found outside a cell.

Question 7

Which of the following is determined by sequence of amino acids bound by peptide bonds?

Accepted Answer

A) primary structure of protein 
B) secondary structure of protein 
C) amino acid 
D) denaturation 
E) peptide bond 
A) primary structure of protein 
B) secondary structure of protein 
C) amino acid 
D) denaturation 
E) peptide bond

Question 8

Cellulose is the

Accepted Answer

A) storage carbohydrate in animals. 
B) nondigestible plant polysaccharide. 
C) major nutrient for most body cells. 
D) sugar found in RNA. 
E) storage carbohydrate in plants. 
A) storage carbohydrate in animals. 
B) nondigestible plant polysaccharide. 
C) major nutrient for most body cells. 
D) sugar found in RNA. 
E) storage carbohydrate in plants.

Question 9

Large carbohydrates are formed from smaller units called

Accepted Answer

A) lipids. 
B) phosphate groups. 
C) amino acids. 
D) monosaccharides. 
E) steroids. 
A) lipids. 
B) phosphate groups. 
C) amino acids. 
D) monosaccharides. 
E) steroids.

Question 10

In an oxidation-reduction reaction,______ are transferred between molecules

Accepted Answer

A)  oxygen 
B)  electrons 
A)  oxygen 
B)  electrons

Question 11

Enzymes are proteins that increase the rate of chemical reactions by

Accepted Answer

A) increasing the activation energy of the reaction. 
B) increasing the concentration of the reactants. 
C) decreasing the activation energy of the reaction. 
D) adjusting the temperature of the reaction. 
A) increasing the activation energy of the reaction. 
B) increasing the concentration of the reactants. 
C) decreasing the activation energy of the reaction. 
D) adjusting the temperature of the reaction.

Question 12

Potential energy is

Accepted Answer

A) stored energy that could do work but is not doing so. 
B) movement of ions or electrons. 
C) the form of energy that actually does work. 
D) energy that flows between objects with different temperatures. 
E) energy that moves in waves. 
A) stored energy that could do work but is not doing so. 
B) movement of ions or electrons. 
C) the form of energy that actually does work. 
D) energy that flows between objects with different temperatures. 
E) energy that moves in waves.

Question 13

Glucose is the

Accepted Answer

A) sugar found in RNA. 
B) nondigestible plant polysaccharide. 
C) storage carbohydrate in animals. 
D) storage carbohydrate in plants. 
E) major nutrient for most body cells. 
A) sugar found in RNA. 
B) nondigestible plant polysaccharide. 
C) storage carbohydrate in animals. 
D) storage carbohydrate in plants. 
E) major nutrient for most body cells.

Question 14

Denaturation is

Accepted Answer

A) a change in the three-dimensional structure of a protein. 
B) a negatively charged ion. 
C) a substance that conducts electricity when placed in solution. 
D) a positively charged ion. 
E) a combination of atoms held together by chemical bonds. 
A) a change in the three-dimensional structure of a protein. 
B) a negatively charged ion. 
C) a substance that conducts electricity when placed in solution. 
D) a positively charged ion. 
E) a combination of atoms held together by chemical bonds.

Question 15

An electrolyte is

Accepted Answer

A) a positively charged ion. 
B) a negatively charged ion. 
C) the alteration in the three-dimensional structure of a protein. 
D) a combination of atoms held together by chemical bonds. 
E) a substance that conducts electricity when placed in solution. 
A) a positively charged ion. 
B) a negatively charged ion. 
C) the alteration in the three-dimensional structure of a protein. 
D) a combination of atoms held together by chemical bonds. 
E) a substance that conducts electricity when placed in solution.

Question 16

Inorganic chemists study substances _______ carbon,while organic chemists study substances _______ carbon.

Accepted Answer

A)  lacking; containing 
B)  containing more than 1 mole of; with less than a mole of 
C)  containing; lacking 
A)  lacking; containing 
B)  containing more than 1 mole of; with less than a mole of 
C)  containing; lacking

Question 17

Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially _________ charged atom of another.

Accepted Answer

A) polar covalent; negatively 
B) nonpolar covalent; negatively 
C) nonpolar covalent; positively 
D) polar covalent; positively 
E) ionic; positively 
A) polar covalent; negatively 
B) nonpolar covalent; negatively 
C) nonpolar covalent; positively 
D) polar covalent; positively 
E) ionic; positively

Question 18

Which of the following is a source of nitrogen for the body?

Accepted Answer

A) proteins 
B) water 
C) carbohydrates 
D) lipids 
E) glucose 
A) proteins 
B) water 
C) carbohydrates 
D) lipids 
E) glucose

Question 19

Which of the following is a proton donor?

Accepted Answer

A) a salt 
B) a base 
C) a neutral substance 
D) an acid 
E) glucose 
A) a salt 
B) a base 
C) a neutral substance 
D) an acid 
E) glucose

Question 20

Subatomic particles located around the nucleus of an atom are

Accepted Answer

A) electrons. 
B) neutrons. 
C) photons. 
D) protons. 
E) neutrinos. 
A) electrons. 
B) neutrons. 
C) photons. 
D) protons. 
E) neutrinos.

Exam 2: The Chemical Basis of Life

Which of the following organic groups does hemoglobin belong to?

-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 "B"?

What molecule is produced as a waste product of the metabolism of glucose by cells?

-The sodium chloride molecule breaks apart in water.What does "B" represent?

A neutral atom contains

Which of the following statements best describes RNA?

Which of the following is determined by sequence of amino acids bound by peptide bonds?

Cellulose is the

Large carbohydrates are formed from smaller units called

In an oxidation-reduction reaction,______ are transferred between molecules

Enzymes are proteins that increase the rate of chemical reactions by

Potential energy is

Glucose is the

Denaturation is

An electrolyte is

Inorganic chemists study substances _______ carbon,while organic chemists study substances _______ carbon.

Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially _________ charged atom of another.

Which of the following is a source of nitrogen for the body?

Which of the following is a proton donor?

Subatomic particles located around the nucleus of an atom 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

Inorganic chemists study substances _ carbon,while organic chemists study substances _ carbon.

Hydrogen bonds form between molecules containing _ bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially _ charged atom of another.