Question 1

The genetic material found in all living things is made of building blocks called

Accepted Answer

A) nucleotides. 
B) monosaccharides. 
C) phospholipids. 
D) steroids. 
A) nucleotides. 
B) monosaccharides. 
C) phospholipids. 
D) steroids.

Question 2

Which of the following is a monomer that can be commonly made from components in Earth's atmosphere?

Accepted Answer

A) nucleotides 
B) amino acids 
C) triglycerides 
D) monosaccharides 
A) nucleotides 
B) amino acids 
C) triglycerides 
D) monosaccharides

Question 3

An acid is a polar substance that dissolves in water and

Accepted Answer

A) becomes nonpolar. 
B) leaves behind an OH- ion. 
C) accepts hydrogen ions from the solution. 
D) donates hydrogen ions to the solution. 
A) becomes nonpolar. 
B) leaves behind an OH- ion. 
C) accepts hydrogen ions from the solution. 
D) donates hydrogen ions to the solution.

Question 4

Carbon atoms are bound to each other by

Accepted Answer

A) ionic bonds. 
B) polar bonds. 
C) hydrogen bonds. 
D) covalent bonds. 
A) ionic bonds. 
B) polar bonds. 
C) hydrogen bonds. 
D) covalent bonds.

Question 5

Using the answer choices below (a through d), match the characteristic with its macromolecule class.
-act as short-term energetic molecules

Accepted Answer

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

Question 6

Which of the following is likely to participate in ionic bonding?

Accepted Answer

A) Li+ 
B) H₂O 
C) He 
D) C6H12O6 
A) Li+ 
B) H₂O 
C) He 
D) C6H12O6

Question 7

Which of the following explains why ice floats on water?

Accepted Answer

A) The crystal structure of ice is more regular than that seen in liquid water. 
B) The distance between water molecules in ice is greater than in liquid water. 
C) The cool temperature of ice reduces the extent of molecular motion relative to liquid water. 
D) When ice forms, the hydrogen bond in the water molecule becomes nonpolar; ice behaves like oil. 
A) The crystal structure of ice is more regular than that seen in liquid water. 
B) The distance between water molecules in ice is greater than in liquid water. 
C) The cool temperature of ice reduces the extent of molecular motion relative to liquid water. 
D) When ice forms, the hydrogen bond in the water molecule becomes nonpolar; ice behaves like oil.

Question 8

You are given an unknown substance and asked to determine whether it is polar or nonpolar. The easiest way to do this would be to

Accepted Answer

A) determine whether the compound is held together by hydrogen bonds. 
B) determine the number of electrons in the compound's outer shell. 
C) mix the compound with an ionic substance to see whether its bonds can withstand the pressure. 
D) determine whether the compound dissolves in water. 
A) determine whether the compound is held together by hydrogen bonds. 
B) determine the number of electrons in the compound's outer shell. 
C) mix the compound with an ionic substance to see whether its bonds can withstand the pressure. 
D) determine whether the compound dissolves in water.

Question 9

When calcium (Ca++) and chloride (Cl⁻) interact with one another they bond using ________ bonds.

Accepted Answer

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

Question 10

The number that represents neutrality on the pH scale is ________.

Accepted Answer

The answer of The number that represents neutrality on the...

Question 11

In the chemical reaction that forms hydrogen peroxide (H₂O₂), hydrogen and oxygen share electrons creating ________ bonds between the two atoms.

Accepted Answer

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

Question 12

In making your morning tea, you drop a sugar cube into the hot water. You stir the mixture but no longer see the sugar cube at the bottom of your mug. In this scenario, the sugar is

Accepted Answer

A) nonpolar. 
B) the solvent. 
C) an acid. 
D) a solute. 
A) nonpolar. 
B) the solvent. 
C) an acid. 
D) a solute.

Question 13

Which of the following is correct about hydrogen bonds?

Accepted Answer

A) Individually, hydrogen bonds are very strong. 
B) They form between neighboring oxygen atoms. 
C) They do not involve binding with a hydrogen atom. 
D) They form due to partial positive and partial negative charges on atoms. 
A) Individually, hydrogen bonds are very strong. 
B) They form between neighboring oxygen atoms. 
C) They do not involve binding with a hydrogen atom. 
D) They form due to partial positive and partial negative charges on atoms.

Question 14

When ammonia (NH₃) is dissolved in a solution, it accepts hydrogen ions from its surroundings. Ammonia is therefore

Accepted Answer

A) a base. 
B) an isotope. 
C) a salt. 
D) an acid. 
A) a base. 
B) an isotope. 
C) a salt. 
D) an acid.

Question 15

Neighboring water molecules are held together with hydrogen bonds because

Accepted Answer

A) partially negatively charged oxygen atoms and partially positively charged hydrogen atoms on separate water molecules are attracted to one another. 
B) the hydrogen and oxygen atoms within a single water molecule share electrons equally. 
C) the oxygen and hydrogen atoms that participate in hydrogen bonding are sharing electons within a single valence shell. 
D) ionic interactions repel water molecules from hydrophobic oils that may be present in a solution. 
A) partially negatively charged oxygen atoms and partially positively charged hydrogen atoms on separate water molecules are attracted to one another. 
B) the hydrogen and oxygen atoms within a single water molecule share electrons equally. 
C) the oxygen and hydrogen atoms that participate in hydrogen bonding are sharing electons within a single valence shell. 
D) ionic interactions repel water molecules from hydrophobic oils that may be present in a solution.

Question 16

Using the answer choices below (a through d), match the characteristic with its macromolecule class.
-used to create steroid molecules like cholesterol

Accepted Answer

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

Question 17

A group of astronauts returning from outer space studied samples taken from their lunar landing. They found that one of their samples was coated with organic compounds. Which of the following statements must be correct about their samples?

Accepted Answer

A) The compounds must be covered with ammonia (NH3) and water vapor. 
B) The samples must lack water, but contain DNA. 
C) The samples must contain carbon atoms. 
D) The specimen must lack water, pesticides, and added hormones. 
A) The compounds must be covered with ammonia (NH3) and water vapor. 
B) The samples must lack water, but contain DNA. 
C) The samples must contain carbon atoms. 
D) The specimen must lack water, pesticides, and added hormones.

Question 18

Using the answer choices below (a through d), match the characteristic with its macromolecule class.
-function energy storage and structural support

Accepted Answer

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

Question 19

Your supervisor provides you with lipids, carbohydrates, proteins, and nucleic acids and asks you to determine their chemical components. Which of the following elements would you NOT expect to find in these items?

Accepted Answer

A) phosphorus 
B) iron 
C) hydrogen 
D) nitrogen 
A) phosphorus 
B) iron 
C) hydrogen 
D) nitrogen

Question 20

Which of the following are composed of the same monomers?

Accepted Answer

A) proteins and DNA 
B) RNA and cellulose 
C) starch and cellulose 
D) cholesterol and sucrose 
A) proteins and DNA 
B) RNA and cellulose 
C) starch and cellulose 
D) cholesterol and sucrose

Exam 2: Chemistry of Life

The genetic material found in all living things is made of building blocks called

Which of the following is a monomer that can be commonly made from components in Earth's atmosphere?

An acid is a polar substance that dissolves in water and

Carbon atoms are bound to each other by

Using the answer choices below (a through d), match the characteristic with its macromolecule class. -act as short-term energetic molecules

Which of the following is likely to participate in ionic bonding?

Which of the following explains why ice floats on water?

You are given an unknown substance and asked to determine whether it is polar or nonpolar. The easiest way to do this would be to

When calcium (Ca++) and chloride (Cl⁻) interact with one another they bond using ________ bonds.

The number that represents neutrality on the pH scale is ________.

In the chemical reaction that forms hydrogen peroxide (H₂O₂), hydrogen and oxygen share electrons creating ________ bonds between the two atoms.

In making your morning tea, you drop a sugar cube into the hot water. You stir the mixture but no longer see the sugar cube at the bottom of your mug. In this scenario, the sugar is

Which of the following is correct about hydrogen bonds?

When ammonia (NH₃) is dissolved in a solution, it accepts hydrogen ions from its surroundings. Ammonia is therefore

Neighboring water molecules are held together with hydrogen bonds because

Using the answer choices below (a through d), match the characteristic with its macromolecule class. -used to create steroid molecules like cholesterol

A group of astronauts returning from outer space studied samples taken from their lunar landing. They found that one of their samples was coated with organic compounds. Which of the following statements must be correct about their samples?

Using the answer choices below (a through d), match the characteristic with its macromolecule class. -function energy storage and structural support

Your supervisor provides you with lipids, carbohydrates, proteins, and nucleic acids and asks you to determine their chemical components. Which of the following elements would you NOT expect to find in these items?

Which of the following are composed of the same monomers?

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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