Question 1

Which of the following is not a lipid?

Accepted Answer

A)  a triglyceride
B)  a phospholipid
C)  a wax
D)  a sterol
E)  a starch moleculeF) None of the above
G) A) and B)

Question 2

The primary building block (monomer) of nucleic acids is

Accepted Answer

A)  a nucleotide.
B)  a glucose molecule.
C)  a fatty acid.
D)  an amino aciD.
E)  four interconnected carbon rings.F) A) and B)
G) A) and C)

Question 3

An amino acid contains

Accepted Answer

A)  three R groups and a glycerol.
B)  nitrogen,carbon,and an R group.
C)  multiple saccharide rings.
D)  carbon and phosphorus monomers.
E)  carbon and phosphorus.F) None of the above
G) A) and D)

Question 4

Sugars (CH2O) n dissolve well in water and are therefore called ______ substances.

Accepted Answer

A)  covalent
B)  ionic
C)  hydrogen
D)  hydrophobic
E)  hydrophilicF) All of the above
G) A) and E)

Question 5

Two hydrogen atoms bonded together form

Accepted Answer

A)  a molecule,but not a compound.
B)  a compound,but not a molecule.
C)  a molecule and a compound.
D)  an atom and a molecule.
E)  an atom,but not a molecule or compound.F) C) and E)
G) None of the above

Question 6

Isotopes of the same element are different from one another in that

Accepted Answer

A)  they have a different number of protons.
B)  they have a different number of neutrons.
C)  they have a different number of electrons.
D)  they are a different element.
E)  only one of the isotopes is matter.F) A) and B)
G) C) and D)

Question 7

A substance with a pH of 13 is

Accepted Answer

A)  a weak acid.
B)  a weak base.
C)  neutral.
D)  a strong aciD.
E)  a strong basE.F) A) and E)
G) A) and D)

Question 8

Within a single molecule of water,____ bonds are formed between oxygen and hydrogen.

Accepted Answer

A)  ionic
B)  covalent
C)  hydrogen
D)  hydrophobic
E)  nuclearF) A) and E)
G) None of the above

Question 9

If a covalent bond is polar

Accepted Answer

A)  electrons are not shared by atoms.
B)  protons are shared by atoms.
C)  it will not form in living organisms.
D)  electronegativity of atoms is unequal in their pull on electrons.
E)  the bond is weak in strength.F) A) and D)
G) A) and E)

Question 10

Saturated fats have long straight tails of fatty acids,while unsaturated fats have kinks in their tails created by the double bonds.The kinks prevent the fatty acids from packing together as tightly.Ectothermic (cold blooded) animals need to keep their membranes fluid at cooler temperature and thus contain ______ their membranes.

Accepted Answer

A)  mostly unsaturated fats in
B)  mostly saturated fats in
C)  no fatty acids in
D)  a cell wall around
E)  no lipids inF) B) and E)
G) C) and E)

Question 11

In a chemical equation

Accepted Answer

A)  the reactants are on the right of the yields arrow.
B)  reactants and products are on both sides of the yields arrow.
C)  the products are on the left of the yields arrow.
D)  the reactants are on the left of the yields arrow.
E)  the number of atoms of each element may differ on the two sides of the yields arrow.F) B) and C)
G) A) and C)

Question 12

Proteins store the genetic information of the cell and transmit it to the next generation.

Accepted Answer

A) True 
 B)False

Question 13

Two hydrogen atoms and an oxygen atom bonded together form

Accepted Answer

A)  a molecule,but not a compound.
B)  a compound,but not a molecule.
C)  a molecule and a compound.
D)  an atom and a molecule.
E)  an atom,but not a molecule or compound.F) C) and E)
G) D) and E)

Question 14

The polymers with the most complex and diverse three-dimensional structures are

Accepted Answer

A)  saturated fats.
B)  unsaturated fats.
C)  proteins.
D)  waxes.
E)  carbohydrates.F) A) and B)
G) B) and D)

Question 15

In the section "Investigating Life:E. T. and the Origin of Life," how did the scientists determine if the organic molecules in the meteorite were extraterrestrial?

Accepted Answer

A)  By identifying a decrease in 13C and 15N in the meteorite compared to terrestrial measurements
B)  By measuring the amount of amino acids in the meteorite
C)  by measuring the amount of nucleotides in the meteorite
D)  By identifying an increase in 13C and 15N in the meteorite compared to terrestrial measurements
E)  By measuring the total amount of carbon and nitrogen in the meteoriteF) A) and B)
G) A) and C)

Question 16

What do a lemon,a toaster oven,and sand grains have in common?

Accepted Answer

A)  All are composed of matter and energy.
B)  All are alive.
C)  All are composed of organic molecules.
D)  All are acidic.
E)  All are basic.F) None of the above
G) A) and E)

Question 17

If an atom has a valence shell that is full,then it

Accepted Answer

A)  is highly reactive.
B)  is chemically unstable.
C)  is highly likely to combine with other atoms.
D)  is found only in a gas form.
E)  is inert.F) C) and D)
G) A) and C)

Question 18

____ bonds are formed between monomers to form a polymer.

Accepted Answer

A)  Ionic
B)  Covalent
C)  Hydrogen
D)  Hydrophobic
E)  NuclearF) None of the above
G) A) and D)

Question 19

The three major components in a nucleotide are

Accepted Answer

A)  glucose,a nitrogen base,and a phosphate group.
B)  glucose,a fatty acid,and glycerol.
C)  a nitrogen base,a carboxyl group,and an R group.
D)  a nitrogen base,a five-carbon sugar,and a phosphate group.
E)  a carboxyl group,an R group,and an amino group.F) D) and E)
G) C) and E)

Question 20

A substance with a pH of 7 is

Accepted Answer

A)  a weak acid.
B)  a weak base.
C)  neutral.
D)  a strong aciD.
E)  a strong basE.F) C) and D)
G) B) and C)

Exam 2: The Chemistry of Life

A substance with a pH of 13 is

Correct Answer
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The polymers with the most complex and diverse three-dimensional structures are

Correct Answer
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In a chemical equation

Correct Answer
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Proteins store the genetic information of the cell and transmit it to the next generation.

Correct Answer
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The primary building block (monomer) of nucleic acids is

Correct Answer
verified

Within a single molecule of water,____ bonds are formed between oxygen and hydrogen.

Correct Answer
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Correct Answer
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If a covalent bond is polar

Correct Answer
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An amino acid contains

Correct Answer
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____ bonds are formed between monomers to form a polymer.

Correct Answer
verified

The three major components in a nucleotide are

Correct Answer
verified

A substance with a pH of 7 is

Correct Answer
verified

Isotopes of the same element are different from one another in that

Correct Answer
verified

If an atom has a valence shell that is full,then it

Correct Answer
verified

Two hydrogen atoms bonded together form

Correct Answer
verified

Which of the following is not a lipid?

Correct Answer
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In the section "Investigating Life:E. T. and the Origin of Life," how did the scientists determine if the organic molecules in the meteorite were extraterrestrial?

Correct Answer
verified

Two hydrogen atoms and an oxygen atom bonded together form

Correct Answer
verified

What do a lemon,a toaster oven,and sand grains have in common?

Correct Answer
verified

Sugars (CH₂O) _n dissolve well in water and are therefore called ______ substances.

Correct Answer
verified

Exam 2: The Chemistry of Life

A substance with a pH of 13 is

Correct AnswerverifiedShow Answer

The polymers with the most complex and diverse three-dimensional structures are

Correct AnswerverifiedShow Answer

In a chemical equation

Correct AnswerverifiedShow Answer

Proteins store the genetic information of the cell and transmit it to the next generation.

Correct AnswerverifiedShow Answer

The primary building block (monomer) of nucleic acids is

Correct AnswerverifiedShow Answer

Within a single molecule of water,____ bonds are formed between oxygen and hydrogen.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If a covalent bond is polar

Correct AnswerverifiedShow Answer

An amino acid contains

Correct AnswerverifiedShow Answer

____ bonds are formed between monomers to form a polymer.

Correct AnswerverifiedShow Answer

The three major components in a nucleotide are

Correct AnswerverifiedShow Answer

A substance with a pH of 7 is

Correct AnswerverifiedShow Answer

Isotopes of the same element are different from one another in that

Correct AnswerverifiedShow Answer

If an atom has a valence shell that is full,then it

Correct AnswerverifiedShow Answer

Two hydrogen atoms bonded together form

Correct AnswerverifiedShow Answer

Which of the following is not a lipid?

Correct AnswerverifiedShow Answer

In the section "Investigating Life:E. T. and the Origin of Life," how did the scientists determine if the organic molecules in the meteorite were extraterrestrial?

Correct AnswerverifiedShow Answer

Two hydrogen atoms and an oxygen atom bonded together form

Correct AnswerverifiedShow Answer

What do a lemon,a toaster oven,and sand grains have in common?

Correct AnswerverifiedShow Answer

Sugars (CH2O) n dissolve well in water and are therefore called ______ substances.

Correct AnswerverifiedShow Answer

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Sugars (CH₂O) _n dissolve well in water and are therefore called ______ substances.

Correct Answer
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