Question 1

The element ________ makes up the chemical backbone of most molecules on planet Earth.

Accepted Answer

The answer of The element ________ makes up the chemical...

Question 2

Using the answer choices below (a through d), match the characteristic with its macromolecule class.
-speed chemical reactions

Accepted Answer

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

Question 3

Using the answer choices below (a through d), match the characteristic with its macromolecule class.
-participate in nearly every chemical reaction in living systems

Accepted Answer

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

Question 4

O₂, also termed atmospheric oxygen, is considered to be a molecule but not a compound. Why not?

Accepted Answer

A) It contains no covalent bonds. 
B) It contains a double covalent bond but not a single covalent bond. 
C) To be considered a compound there must be a minimum of three atoms; atmospheric oxygen is too small. 
D) Compounds are defined as molecules constructed from two or more different elements. 
A) It contains no covalent bonds. 
B) It contains a double covalent bond but not a single covalent bond. 
C) To be considered a compound there must be a minimum of three atoms; atmospheric oxygen is too small. 
D) Compounds are defined as molecules constructed from two or more different elements.

Question 5

Carbon, hydrogen, and nitrogen are all examples of

Accepted Answer

A) compounds. 
B) macromolecules. 
C) elements. 
D) amino acids. 
A) compounds. 
B) macromolecules. 
C) elements. 
D) amino acids.

Question 6

A solution with a pH of 3 is

Accepted Answer

A) acidic. 
B) basic. 
C) nonpolar. 
D) neutral. 
A) acidic. 
B) basic. 
C) nonpolar. 
D) neutral.

Question 7

Nitrogen has seven protons, seven neutrons, and seven electrons. What is the atomic mass of nitrogen?

Accepted Answer

A) 0 
B) 7 
C) 14 
D) 21 
A) 0 
B) 7 
C) 14 
D) 21

Question 8

Which of the following most commonly represents the shape associated with functional proteins?

Accepted Answer

A) a long linear chain of amino acids 
B) individual amino acids that are not covalently joined together 
C) coils and sheets of joined amino acids 
D) three-dimensional folded chains of amino acids 
A) a long linear chain of amino acids 
B) individual amino acids that are not covalently joined together 
C) coils and sheets of joined amino acids 
D) three-dimensional folded chains of amino acids

Question 9

Nitrogen has an atomic number of 7 and an atomic mass number of 14. Using the image provided, diagram the location and number of protons, neutrons, and electrons in nitrogen.

Accepted Answer

The atomic number tells us the number of

Question 10

Which of the following statements is true of proteins, carbohydrates, and nucleic acids?

Accepted Answer

A) All three are used to store genetic information. 
B) None of these macromolecules mixes well with water. 
C) Each of these molecules is built from a common set of monomers. 
D) All of these molecules are primarily used as energy-storage molecules. 
A) All three are used to store genetic information. 
B) None of these macromolecules mixes well with water. 
C) Each of these molecules is built from a common set of monomers. 
D) All of these molecules are primarily used as energy-storage molecules.

Question 11

An atom that becomes charged due to the gain or loss of an electron is called a(n) ________.

Accepted Answer

The answer of An atom that becomes charged due to...

Question 12

Of the following values, which indicates the most basic pH?

Accepted Answer

A) 5 
B) 7 
C) 8 
D) 10 
A) 5 
B) 7 
C) 8 
D) 10

Question 13

Which of the following distinguishes ionic bonds from covalent bonds?

Accepted Answer

A) Ionic bonds form between the same two elements, whereas covalent bonds form between different elements. 
B) Ionic bonds hold together compounds that do not dissolve in water, whereas covalent bonds hold together molecules that dissolve in water. 
C) Ionic bonds hold together oppositely charged atoms, whereas covalent bonds hold together atoms that share electrons. 
D) Ionic bonds consist of atoms with partial charges, whereas covalent bonds consist of atoms with full positive and negative charges. 
A) Ionic bonds form between the same two elements, whereas covalent bonds form between different elements. 
B) Ionic bonds hold together compounds that do not dissolve in water, whereas covalent bonds hold together molecules that dissolve in water. 
C) Ionic bonds hold together oppositely charged atoms, whereas covalent bonds hold together atoms that share electrons. 
D) Ionic bonds consist of atoms with partial charges, whereas covalent bonds consist of atoms with full positive and negative charges.

Question 14

An instrument that identifies chemicals based upon their weights is the ________.

Accepted Answer

The answer of An instrument that identifies chemicals based upon...

Question 15

The positively charged subatomic particle is located in the ________.

Accepted Answer

The answer of The positively charged subatomic particle is located...

Question 16

During a study session, a Biology classmate holds up a bottle of water and mentions that there are both hydrogen bonds and covalent bonds found within the liquid. Explain your classmate's statement by describing the types of bonds that are found within your bottle of water.

Accepted Answer

Your classmate is correct in his or her

Question 17

One of the symptoms of kidney disease is the presence of proteins in a patient's urine. To quickly test for kidney disease using a urine sample, a doctor might add a chemical that causes a color change when

Accepted Answer

A) nitrogen, but not oxygen, is present. 
B) nitrogen, but not phosphorus, is present. 
C) only oxygen and hydrogen are present. 
D) only carbon and hydrogen are present. 
A) nitrogen, but not oxygen, is present. 
B) nitrogen, but not phosphorus, is present. 
C) only oxygen and hydrogen are present. 
D) only carbon and hydrogen are present.

Question 18

Individual water molecules orient toward each other because of the ________ bonds that form between them.

Accepted Answer

A) covalent 
B) peptide 
C) hydrogen 
D) ionic 
A) covalent 
B) peptide 
C) hydrogen 
D) ionic

Question 19

The subatomic particles that possess a single negative charge and surround the nucleus are the

Accepted Answer

A) isotopes. 
B) protons. 
C) neutrons. 
D) electrons. 
A) isotopes. 
B) protons. 
C) neutrons. 
D) electrons.

Question 20

In the laboratory you identify protein in a food item that you've tested. Which of the following must the food item also contain?

Accepted Answer

A) glucose 
B) lipids 
C) amino acids 
D) nucleotides 
A) glucose 
B) lipids 
C) amino acids 
D) nucleotides

Exam 2: Chemistry of Life

The element ________ makes up the chemical backbone of most molecules on planet Earth.

Using the answer choices below (a through d), match the characteristic with its macromolecule class. -speed chemical reactions

Using the answer choices below (a through d), match the characteristic with its macromolecule class. -participate in nearly every chemical reaction in living systems

O₂, also termed atmospheric oxygen, is considered to be a molecule but not a compound. Why not?

Carbon, hydrogen, and nitrogen are all examples of

A solution with a pH of 3 is

Nitrogen has seven protons, seven neutrons, and seven electrons. What is the atomic mass of nitrogen?

Which of the following most commonly represents the shape associated with functional proteins?

Nitrogen has an atomic number of 7 and an atomic mass number of 14. Using the image provided, diagram the location and number of protons, neutrons, and electrons in nitrogen.

Which of the following statements is true of proteins, carbohydrates, and nucleic acids?

An atom that becomes charged due to the gain or loss of an electron is called a(n) ________.

Of the following values, which indicates the most basic pH?

Which of the following distinguishes ionic bonds from covalent bonds?

An instrument that identifies chemicals based upon their weights is the ________.

The positively charged subatomic particle is located in the ________.

During a study session, a Biology classmate holds up a bottle of water and mentions that there are both hydrogen bonds and covalent bonds found within the liquid. Explain your classmate's statement by describing the types of bonds that are found within your bottle of water.

One of the symptoms of kidney disease is the presence of proteins in a patient's urine. To quickly test for kidney disease using a urine sample, a doctor might add a chemical that causes a color change when

Individual water molecules orient toward each other because of the ________ bonds that form between them.

The subatomic particles that possess a single negative charge and surround the nucleus are the

In the laboratory you identify protein in a food item that you've tested. Which of the following must the food item also contain?

The Nature of Science

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Homeostasis, Reproduction, and Development

Digestive, Muscular, and Skeletal Systems

Circulatory, Respiratory, Urinary, and Nervous Systems

Endocrine and Immune Systems

Plant Physiology

Applying the Science

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