Question 1

When an ATP molecule is used to supply energy,which of the following occurs?

Accepted Answer

A)   a phosphate bond is added
B)   a phosphate bond is broken
C)   oxygen is removed
D)   oxygen is added
E)   an adenine is addedF) B) and E)
G) C) and E)

Question 2

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Accepted Answer

A)   4
B)   5
C)   9
D)   13
E)   7F) A) and D)
G) C) and D)

Question 3

Which polysaccharide is consumed as a source of fiber?

Accepted Answer

A)   cellulose
B)   glycogen
C)   glucose
D)   chitin
E)   starchF) B) and E)
G) D) and E)

Question 4

How are fats,phospholipids,and steroids alike?

Accepted Answer

A)   They are all solid at room temperature.
B)   They each contain a polar phosphate group.
C)   They each contain only one fatty acid.
D)   They do not dissolve in water.
E)   They all contain at least one carbon ring.F) D) and E)
G) B) and D)

Question 5

When two amino acids combine via a dehydration reaction,

Accepted Answer

A)   a peptide bond is formed.
B)   the R groups are lost.
C)   water is added to begin the reaction.
D)   the carboxyl group of each join together.
E)   the amino group of each join together.F) B) and E)
G) B) and D)

Question 6

On a warm day in April,Tina jumped into the swimming pool.To her surprise the water was really cold.Which property of water did she discover?

Accepted Answer

A)   Water molecules are cohesive.
B)   The temperature of liquid water rises and falls slowly.
C)   Water possesses hydrogen bonds.
D)   Water is a polar molecule.
E)   Frozen water is less dense than liquid water.F) None of the above
G) A) and C)

Question 7

A solution containing 0.00001 moles of H+ has a pH of

Accepted Answer

A)   3.
B)   5.
C)   7.
D)   9.
E)   11.F) B) and D)
G) None of the above

Question 8

Which of the following foods would be a good source of fiber?

Accepted Answer

A)   peaches
B)   whole-wheat bread
C)   peanuts
D)   bran cereal
E)   All of these are good sources of fiber.F) A) and D)
G) A) and C)

Question 9

Radiation can have both positive and negative impact on humans.

Accepted Answer

A) True 
 B)False

Question 10

The presence of a buffer in our blood helps maintain homeostasis.

Accepted Answer

A) True 
 B)False

Question 11

The reason water is polar is because

Accepted Answer

A)   in polar molecules atoms share electrons evenly.
B)   the electrons spend more time circling the oxygen atom than the hydrogens.
C)   hydrophilic molecules interact with water.
D)   hydrophobic molecules do not interact with water.
E)   there is a transfer of electrons from the hydrogen to the oxygen.F) A) and B)
G) All of the above

Question 12

Atoms that share electrons have what type of bonds?

Accepted Answer

A)   covalent
B)   neutral
C)   hydrogen
D)   colloidal
E)   ionicF) A) and B)
G) All of the above

Question 13

The sides of the DNA ladder (backbone) are

Accepted Answer

A)   alternating carbons and nitrogens.
B)   the R groups.
C)   the nitrogenous bases.
D)   alternating nitrogens and phosphates.
E)   sugars and phosphates.F) B) and E)
G) A) and C)

Question 14

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

Accepted Answer

A) True 
 B)False

Question 15

What makes each amino acid unique?

Accepted Answer

A)   the central carbon
B)   the R group
C)   the amino group
D)   the carboxyl group
E)   the carbon ringF) A) and C)
G) C) and E)

Question 16

How many elements occur naturally?

Accepted Answer

A)   112
B)   92
C)   64
D)   32
E)   6F) A) and E)
G) A) and B)

Question 17

Which of the following is not a monosaccharide?

Accepted Answer

A)   glucose
B)   fructose
C)   galactose
D)   maltose
E)   None of these are monosaccharides.F) None of the above
G) B) and C)

Question 18

ATP carries energy in the form of high-energy

Accepted Answer

A)   carbohydrate bonds.
B)   peptide bonds.
C)   lipid bonds.
D)   phosphate bonds.
E)   hydrogen bonds.F) B) and E)
G) A) and D)

Question 19

The sex hormones belong to which category of lipids?

Accepted Answer

A)   steroids
B)   fats
C)   oils
D)   triglycerides
E)   phospholipidsF) D) and E)
G) A) and B)

Question 20

CaCl2 is a salt that forms as the result of what type of bond?

Accepted Answer

A)   covalent
B)   hydrogen
C)   polar
D)   nonpolar
E)   ionicF) C) and D)
G) A) and E)

Exam 2: Chemistry of Life

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

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The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

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Which of the following is not a monosaccharide?

Correct AnswerverifiedShow Answer

How are fats,phospholipids,and steroids alike?

Correct AnswerverifiedShow Answer

The reason water is polar is because

Correct AnswerverifiedShow Answer

The sides of the DNA ladder (backbone) are

Correct AnswerverifiedShow Answer

When two amino acids combine via a dehydration reaction,

Correct AnswerverifiedShow Answer

A solution containing 0.00001 moles of H+ has a pH of

Correct AnswerverifiedShow Answer

How many elements occur naturally?

Correct AnswerverifiedShow Answer

When an ATP molecule is used to supply energy,which of the following occurs?

Correct AnswerverifiedShow Answer

Which polysaccharide is consumed as a source of fiber?

Correct AnswerverifiedShow Answer

ATP carries energy in the form of high-energy

Correct AnswerverifiedShow Answer

CaCl2 is a salt that forms as the result of what type of bond?

Correct AnswerverifiedShow Answer

What makes each amino acid unique?

Correct AnswerverifiedShow Answer

The presence of a buffer in our blood helps maintain homeostasis.

Correct AnswerverifiedShow Answer

On a warm day in April,Tina jumped into the swimming pool.To her surprise the water was really cold.Which property of water did she discover?

Correct AnswerverifiedShow Answer

Radiation can have both positive and negative impact on humans.

Correct AnswerverifiedShow Answer

The sex hormones belong to which category of lipids?

Correct AnswerverifiedShow Answer

Which of the following foods would be a good source of fiber?

Correct AnswerverifiedShow Answer

Atoms that share electrons have what type of bonds?

Correct AnswerverifiedShow Answer

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A solution containing 0.00001 moles of H⁺ has a pH of

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CaCl₂ is a salt that forms as the result of what type of bond?

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