Question 1

How can we explain that water is a solvent?

Accepted Answer

A) Water has a polar nature, and as such its polar molecules will bind to substances that have positive or negative charges. 
B) Water is a heavy substance, and as such can disrupt pre-existing bonds. 
C) Water is highly cohesive and adhesive, which allows it to bind to different substances as a solvent. 
D) Water is very dense in its liquid state, which allows it to bind to different substances as a solvent. 
A) Water has a polar nature, and as such its polar molecules will bind to substances that have positive or negative charges. 
B) Water is a heavy substance, and as such can disrupt pre-existing bonds. 
C) Water is highly cohesive and adhesive, which allows it to bind to different substances as a solvent. 
D) Water is very dense in its liquid state, which allows it to bind to different substances as a solvent.

Question 2

Identify the reactants in the following chemical reaction: C10H8 + 12 O2 → 10 CO2 + 4 H2O

Accepted Answer

A) C10H8 and 10 CO2 
B) 12 O2 and 4 H2O 
C) C10H8 and 12 O2 
D) 10 CO2 and 4 H2O 
A) C10H8 and 10 CO2 
B) 12 O2 and 4 H2O 
C) C10H8 and 12 O2 
D) 10 CO2 and 4 H2O

Question 3

The unique chemical qualities of individual amino acids do not directly determine the function of an enzyme.What, then, is the role of the individual amino acid's unique chemical qualities, and what directly determines the function of an enzyme?

Accepted Answer

The side groups of an amino acid are wha

Question 4

A needle can be made to "float" on the surface tension of water.What causes this surface tension to form?

Accepted Answer

A) The adhesion of water molecules to the needle 
B) The cohesion of water molecules to each other 
C) The solubility of water 
D) The heat capacity of water 
A) The adhesion of water molecules to the needle 
B) The cohesion of water molecules to each other 
C) The solubility of water 
D) The heat capacity of water

Question 5

Why is life based on carbon-based molecules?

Accepted Answer

A) Because carbon is found everywhere 
B) Because carbon has unique ionic properties 
C) Because a single carbon can bond with up to four other atoms 
D) Because a single carbon can bond with up to eight other atoms 
A) Because carbon is found everywhere 
B) Because carbon has unique ionic properties 
C) Because a single carbon can bond with up to four other atoms 
D) Because a single carbon can bond with up to eight other atoms

Question 6

What are the ecological consequences of acidification of rain and oceans?

Accepted Answer

A) They damage the health of ecosystems. 
B) They do not have any consequences on ecosystems. 
C) They improve the health of ecosystems. 
D) Acid rain damages ecosystems, but ocean acidification improves the health of oceans. 
A) They damage the health of ecosystems. 
B) They do not have any consequences on ecosystems. 
C) They improve the health of ecosystems. 
D) Acid rain damages ecosystems, but ocean acidification improves the health of oceans.

Question 7

Water "beads up" on synthetic fabric such as polyester but binds to cotton.What is the most likely explanation for this?

Accepted Answer

A) Polyester is not a naturally occurring substance, whereas cotton is a naturally occurring substance. 
B) Polyester is more flexible than cotton. 
C) Polyester fibers are thinner than cotton fibers. 
D) Polyester is nonpolar, whereas cotton is polar. 
A) Polyester is not a naturally occurring substance, whereas cotton is a naturally occurring substance. 
B) Polyester is more flexible than cotton. 
C) Polyester fibers are thinner than cotton fibers. 
D) Polyester is nonpolar, whereas cotton is polar.

Question 8

Water is the least dense when it ________.

Accepted Answer

A) is frozen 
B) is just above freezing 
C) is at room temperature 
D) is just below boiling 
A) is frozen 
B) is just above freezing 
C) is at room temperature 
D) is just below boiling

Question 9

Organic compounds are distinguished by molecules that contain ________ bonded to other elements.

Accepted Answer

A) nitrogen 
B) carbon 
C) oxygen 
D) hydrogen 
A) nitrogen 
B) carbon 
C) oxygen 
D) hydrogen

Question 10

The atomic number corresponds to the number of ________ in a specific element, while the atomic weight corresponds to the number of ________ in a specific element.

Accepted Answer

A) protons; neutrons 
B) neutrons; protons 
C) protons; protons and neutrons 
D) protons and neutrons; neutrons 
A) protons; neutrons 
B) neutrons; protons 
C) protons; protons and neutrons 
D) protons and neutrons; neutrons

Question 11

When water melts from a solid ice cube to a liquid, its volume ________ and its mass ________.

Accepted Answer

A) Increases; decreases 
B) Decreases; increases 
C) Decreases; stays the same 
D) Increases; stays the same 
A) Increases; decreases 
B) Decreases; increases 
C) Decreases; stays the same 
D) Increases; stays the same

Question 12

What are isomers?

Accepted Answer

A) Two molecules that have the same arrangement of atoms 
B) Two atoms that have the same ionic properties 
C) Two molecules that have the same atoms arranged differently 
D) Two elements that can bond with each other 
A) Two molecules that have the same arrangement of atoms 
B) Two atoms that have the same ionic properties 
C) Two molecules that have the same atoms arranged differently 
D) Two elements that can bond with each other

Question 13

Proteins are diverse molecules that perform a wide variety of functions.Which of the following is not a typical function of proteins?

Accepted Answer

A) Transport 
B) Catalyze reactions via enzymes 
C) Movement 
D) Energy storage 
A) Transport 
B) Catalyze reactions via enzymes 
C) Movement 
D) Energy storage

Question 14

The number of electrons of an atom determines its ________.

Accepted Answer

A) chemical element 
B) isotope 
C) bonding properties 
D) all of the above are correct 
A) chemical element 
B) isotope 
C) bonding properties 
D) all of the above are correct

Question 15

Which of the following represents a simple sugar (also called a monosaccharide)?

Accepted Answer

A) Lactose 
B) Cellulose 
C) Glucose 
D) Sucrose (table sugar) 
A) Lactose 
B) Cellulose 
C) Glucose 
D) Sucrose (table sugar)

Question 16

The breaking of a large organic molecule into smaller, individual subunits involves multiple ________.

Accepted Answer

A) hydrolysis reactions 
B) osmotic reactions 
C) dehydration synthesis reactions 
D) hydrosynthetic reactions 
A) hydrolysis reactions 
B) osmotic reactions 
C) dehydration synthesis reactions 
D) hydrosynthetic reactions

Question 17

What do we call the sum total of all the chemical reactions that take place in your body?

Accepted Answer

A) Catabolism 
B) Anabolism 
C) Embolism 
D) Metabolism 
A) Catabolism 
B) Anabolism 
C) Embolism 
D) Metabolism

Question 18

The typical carbon atom is described in the periodic table by the accompanying box.How many protons are in a typical oxygen atom?

Accepted Answer

A) 8 
B) 12 
C) 18 
D) Not enough information given 
A) 8 
B) 12 
C) 18 
D) Not enough information given

Question 19

What will be accomplished by lowering the activation energy of a reaction?

Accepted Answer

A) The reaction will proceed more slowly. 
B) The reaction will proceed more quickly. 
C) The reaction will stop completely. 
D) The reaction will reverse. 
A) The reaction will proceed more slowly. 
B) The reaction will proceed more quickly. 
C) The reaction will stop completely. 
D) The reaction will reverse.

Question 20

What is another name for the polymers of carbohydrates?

Accepted Answer

A) Triglycerides 
B) Polysaccharides 
C) Polypeptides 
D) Nucleotides 
A) Triglycerides 
B) Polysaccharides 
C) Polypeptides 
D) Nucleotides

How can we explain that water is a solvent?

Identify the reactants in the following chemical reaction: C₁₀H₈ + 12 O₂ → 10 CO₂ + 4 H₂O

The unique chemical qualities of individual amino acids do not directly determine the function of an enzyme.What, then, is the role of the individual amino acid's unique chemical qualities, and what directly determines the function of an enzyme?

A needle can be made to "float" on the surface tension of water.What causes this surface tension to form?

Why is life based on carbon-based molecules?

What are the ecological consequences of acidification of rain and oceans?

Water "beads up" on synthetic fabric such as polyester but binds to cotton.What is the most likely explanation for this?

Water is the least dense when it ________.

Organic compounds are distinguished by molecules that contain ________ bonded to other elements.

The atomic number corresponds to the number of in a specific element, while the atomic weight corresponds to the number of in a specific element.

When water melts from a solid ice cube to a liquid, its volume and its mass .

What are isomers?

Proteins are diverse molecules that perform a wide variety of functions.Which of the following is not a typical function of proteins?

The number of electrons of an atom determines its ________.

Which of the following represents a simple sugar (also called a monosaccharide)?

The breaking of a large organic molecule into smaller, individual subunits involves multiple ________.

What do we call the sum total of all the chemical reactions that take place in your body?

The typical carbon atom is described in the periodic table by the accompanying box.How many protons are in a typical oxygen atom?

What will be accomplished by lowering the activation energy of a reaction?

What is another name for the polymers of carbohydrates?

An Introduction to the Science of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

DNA: The Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters

Exam 2: The Chemistry of Life

How can we explain that water is a solvent?

Identify the reactants in the following chemical reaction: C10H8 + 12 O2 → 10 CO2 + 4 H2O

The unique chemical qualities of individual amino acids do not directly determine the function of an enzyme.What, then, is the role of the individual amino acid's unique chemical qualities, and what directly determines the function of an enzyme?

A needle can be made to "float" on the surface tension of water.What causes this surface tension to form?

Why is life based on carbon-based molecules?

What are the ecological consequences of acidification of rain and oceans?

Water "beads up" on synthetic fabric such as polyester but binds to cotton.What is the most likely explanation for this?

Water is the least dense when it ________.

Organic compounds are distinguished by molecules that contain ________ bonded to other elements.

The atomic number corresponds to the number of ________ in a specific element, while the atomic weight corresponds to the number of ________ in a specific element.

When water melts from a solid ice cube to a liquid, its volume ________ and its mass ________.

What are isomers?

Proteins are diverse molecules that perform a wide variety of functions.Which of the following is not a typical function of proteins?

The number of electrons of an atom determines its ________.

Which of the following represents a simple sugar (also called a monosaccharide)?

The breaking of a large organic molecule into smaller, individual subunits involves multiple ________.

What do we call the sum total of all the chemical reactions that take place in your body?

The typical carbon atom is described in the periodic table by the accompanying box.How many protons are in a typical oxygen atom?

What will be accomplished by lowering the activation energy of a reaction?

What is another name for the polymers of carbohydrates?

An Introduction to the Science of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

DNA: The Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters

Identify the reactants in the following chemical reaction: C₁₀H₈ + 12 O₂ → 10 CO₂ + 4 H₂O

The atomic number corresponds to the number of in a specific element, while the atomic weight corresponds to the number of in a specific element.

When water melts from a solid ice cube to a liquid, its volume and its mass .