Question 1

Oil and water do not mix together well because

Accepted Answer

A)  water is polar and oil is nonpolar.
B)  only identical molecules of the same chemical can easily mix together.
C)  water has hydrogen bonds and oil is polar.
D)  water and oil are covalently bonded together.

Question 2

The central element found in organic molecules is

Accepted Answer

A)  calcium.
B)  carbon.
C)  silicon.
D)  sodium.

Question 3

A scientist observed a chemical that changes to bright red in the presence of organic compounds containing nitrogen and phosphorus. To test this chemical, a set of test tubes each containing a purified sample of one of the following organic compounds is prepared. The chemical is then added to each tube. Which test tube will always turn bright red?

Accepted Answer

A)  the tube containing nucleic acids
B)  the tube containing proteins
C)  the tube containing carbohydrates
D)  the tube containing phospholipids

Question 4

Which of the following factors explains carbon's prominence in living systems?

Accepted Answer

A)  Carbon forms weak reversible bonds.
B)  Carbon bonds with up to three other atoms.
C)  Carbon-based molecules can form long chains and rings.
D)  Carbon does not form small molecules. C

Question 5

If iodide ions (I⁻)  were dissolved in water, they would be attracted to

Accepted Answer

A)  A only
B)  B only
C)  C only
D)  A and C

Question 6

Molecules with an uneven distribution of charge are described as ________.

Accepted Answer

The answer of Molecules with an uneven distribution of charge...

Question 7

Which of the following could be built solely from glucose molecules?

Accepted Answer

A)  fatty acids
B)  DNA
C)  oils
D)  starch

Question 8

Which of the following pieces of evidence would best demonstrate that a bacterium found on an asteroid originated in outer space?

Accepted Answer

A)  the presence of volcanic ash on the outside of the bacterial cell
B)  the absence of common gases found in Earth's atmosphere
C)  the presence of right-handed amino acids in the bacterium's proteins
D)  the absence of hydrogen bonds between water molecules in the bacterial cell

Question 9

Which of the following is an organic compound?

Accepted Answer

A)  water (H₂O) 
B)  methane (CH4) 
C)  ammonia (NH3) 
D)  carbon dioxide (CO₂)

Question 10

The pH scale measures

Accepted Answer

A)  the amount of water in a solution.
B)  the likelihood that a solution will evaporate.
C)  the concentration of hydrogen ions in a solution.
D)  the number of atoms found within a molecule.

Question 11

Which of the following amino acids begins the construction of all proteins in the human body?

Accepted Answer

A)  methionine
B)  leucine
C)  proline
D)  tryptophan A

Question 12

Using the answer choices below (a through d) , match the characteristic with its macromolecule class.
-form the major framework of biological membranes

Accepted Answer

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

Question 13

Chemists often represent the structure of atoms using p, n, and e to indicate the number of protons, neutrons, and electrons. Which atom would have an atomic weight of 30?

Accepted Answer

A)  15 p, 15 n, 15 e
B)  10 p, 10 n, 10 e
C)  15 p, 0 n, 15 e
D)  0p, 15n, 15 e

Question 14

How many different amino acids are used to build proteins?

Accepted Answer

A)  90
B)  20
C)  19
D)  4

Question 15

In living systems, a critical component of many reactions is

Accepted Answer

A)  carbon dioxide.
B)  calcium.
C)  water.
D)  hydrogen sulfide. C

Question 16

For each of the major classes of macromolecules, indicate the basic subunits used to build it.

Accepted Answer

Carbohydrates are composed of monomers c...

Question 17

Using the answer choices below (a through d) , match the characteristic with its macromolecule class.
-store and transmit genetic information

Accepted Answer

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

Question 18

Nucleotides

Accepted Answer

A)  are the building blocks of proteins.
B)  are involved in every chemical reaction in the cell.
C)  form physical structures such as hair.
D)  are the building blocks of nucleic acids.

Question 19

Antibodies are an important class of human proteins that function in immune defense. If scientists fragmented antibodies under laboratory conditions, what chemical building blocks would they recover?

Accepted Answer

A)  monosaccharides
B)  phospholipids
C)  amino acids
D)  nitrogenous bases

Question 20

A carwash attendant offers to treat your windshield with a protective agent. This substance coats the glass, causing beads of water to easily roll off during a rain shower. Which of the following must be correct about the protective agent?

Accepted Answer

A)  It resists temperature changes well.
B)  It must be an acid.
C)  It is a polar substance.
D)  It must be hydrophobic.

Exam 2: Chemistry of Life

Oil and water do not mix together well because

Correct Answer
verified

The central element found in organic molecules is

Correct Answer
verified

Correct Answer
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Which of the following factors explains carbon's prominence in living systems?

Correct Answer
verified
C

If iodide ions (I⁻) were dissolved in water, they would be attracted to

Correct Answer
verified

Molecules with an uneven distribution of charge are described as ________.

Correct Answer
verified

Which of the following could be built solely from glucose molecules?

Correct Answer
verified

Which of the following pieces of evidence would best demonstrate that a bacterium found on an asteroid originated in outer space?

Correct Answer
verified

Which of the following is an organic compound?

Correct Answer
verified

The pH scale measures

Correct Answer
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Which of the following amino acids begins the construction of all proteins in the human body?

Correct Answer
verified
A

Using the answer choices below (a through d) , match the characteristic with its macromolecule class. -form the major framework of biological membranes

Correct Answer
verified

Chemists often represent the structure of atoms using p, n, and e to indicate the number of protons, neutrons, and electrons. Which atom would have an atomic weight of 30?

Correct Answer
verified

How many different amino acids are used to build proteins?

Correct Answer
verified

In living systems, a critical component of many reactions is

Correct Answer
verified
C

For each of the major classes of macromolecules, indicate the basic subunits used to build it.

Correct Answer
verified
Carbohydrates are composed of monomers c...
View Answer

Using the answer choices below (a through d) , match the characteristic with its macromolecule class. -store and transmit genetic information

Correct Answer
verified

Nucleotides

Correct Answer
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Antibodies are an important class of human proteins that function in immune defense. If scientists fragmented antibodies under laboratory conditions, what chemical building blocks would they recover?

Correct Answer
verified

A carwash attendant offers to treat your windshield with a protective agent. This substance coats the glass, causing beads of water to easily roll off during a rain shower. Which of the following must be correct about the protective agent?

Correct Answer
verified

Exam 2: Chemistry of Life

Oil and water do not mix together well because

Correct AnswerverifiedShow Answer

The central element found in organic molecules is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following factors explains carbon's prominence in living systems?

Correct AnswerverifiedC

If iodide ions (I⁻) were dissolved in water, they would be attracted to

Correct AnswerverifiedShow Answer

Molecules with an uneven distribution of charge are described as ________.

Correct AnswerverifiedShow Answer

Which of the following could be built solely from glucose molecules?

Correct AnswerverifiedShow Answer

Which of the following pieces of evidence would best demonstrate that a bacterium found on an asteroid originated in outer space?

Correct AnswerverifiedShow Answer

Which of the following is an organic compound?

Correct AnswerverifiedShow Answer

The pH scale measures

Correct AnswerverifiedShow Answer

Which of the following amino acids begins the construction of all proteins in the human body?

Correct AnswerverifiedA

Using the answer choices below (a through d) , match the characteristic with its macromolecule class. -form the major framework of biological membranes

Correct AnswerverifiedShow Answer

Chemists often represent the structure of atoms using p, n, and e to indicate the number of protons, neutrons, and electrons. Which atom would have an atomic weight of 30?

Correct AnswerverifiedShow Answer

How many different amino acids are used to build proteins?

Correct AnswerverifiedShow Answer

In living systems, a critical component of many reactions is

Correct AnswerverifiedC

For each of the major classes of macromolecules, indicate the basic subunits used to build it.

Correct AnswerverifiedCarbohydrates are composed of monomers c...View AnswerShow Answer

Using the answer choices below (a through d) , match the characteristic with its macromolecule class. -store and transmit genetic information

Correct AnswerverifiedShow Answer

Nucleotides

Correct AnswerverifiedShow Answer

Antibodies are an important class of human proteins that function in immune defense. If scientists fragmented antibodies under laboratory conditions, what chemical building blocks would they recover?

Correct AnswerverifiedShow Answer

A carwash attendant offers to treat your windshield with a protective agent. This substance coats the glass, causing beads of water to easily roll off during a rain shower. Which of the following must be correct about the protective agent?

Correct AnswerverifiedShow Answer

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C

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A

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C

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Carbohydrates are composed of monomers c...
View Answer

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