Question 1

Characteristics shared by all cells include _______.

Accepted Answer

A)   a membrane serving as a cell boundary
B)   the possession of genetic information
C)   the presence of cellular ﬂuid
D)   All of the choices are correct.E) All of the above
F) B) and C)

Question 2

The lipid group that serves as energy storage molecules is the ______.

Accepted Answer

A)   phospholipids
B)   steroids
C)   waxes
D)   prostaglandins
E)   triglyceridesF) A) and C)
G) B) and D)

Question 3

All proteins are enzymes.

Accepted Answer

A) True 
 B)False

Question 4

Hydrogen bonds _______.

Accepted Answer

A)   result from attractive forces between molecules with polar covalent bonds
B)   result from attractive forces between molecules with polar ionic bonds
C)   are the strongest bonds between molecules
D)   result from attractive forces between molecules with nonpolar ionic bonds
E)   result from attractive forces between molecules with nonpolar covalent bondsF) A) and E)
G) B) and D)

Question 5

The purine ______ always hydrogen bonds with the pyrimidine ______ in double-stranded DNA.

Accepted Answer

A)   guanine; cytosine
B)   cytosine; guanine
C)   adenine; guanine
D)   thymine; guanineE) B) and D)
F) None of the above

Question 6

The most important outcome of polypeptide intrachain bonding and folding is the unique shape of the protein.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is a correct description of a component of the ATP molecule?

Accepted Answer

A)   Nitrogenous base: alanine
B)   Sugar: deoxyribose
C)   High energy bond: peptide bond
D)   High energy bond: glycosidic bond
E)   Sugar: riboseF) C) and E)
G) A) and B)

Question 8

Which of the following represents a reversible reaction?

Accepted Answer

A)   AB + XY ? AY + XB
B)   A + B ?AB
C)   AB ? A + B
D)   AB + XY ? AY + XBE) B) and C)
F) All of the above

Question 9

In the cell cytoplasm, molecules of ATP are a ______.

Accepted Answer

A)   solute
B)   solventC) A) and B)
D) undefined

Question 10

An example of an amphipathic molecule found in living cells is ______.

Accepted Answer

A)   phospholipid
B)   ATP
C)   nucleic acid
D)   glucose
E)   proteinF) A) and B)
G) All of the above

Question 11

Substances that release ions when dissolved in water and conduct electricity are ______.

Accepted Answer

A)   covalent
B)   nonpolar
C)   solvents
D)   electrolytes
E)   electronsF) A) and D)
G) A) and E)

Question 12

A culture of an organism believed to cause intestinal symptoms is viewed under the microscope, and the microbiologist observes a cell membrane, ?agella, mitochondria, and some dark unrecognizable structures within each cell. The microbiologist notes that the cells are eukaryotic because _______.

Accepted Answer

A)   only eukaryotic cells have mitochondria
B)   only eukaryotic cells have ?agella
C)   only eukaryotic cells have a cell membrane
D)   the dark structures must be the cell nucleiE) None of the above
F) A) and C)

Question 13

Which pertains to DNA but not to RNA?

Accepted Answer

A)   Contains nucleotides
B)   Contains adenine
C)   Contains ribose
D)   Contains thymine
E)   Contains uracilF) A) and B)
G) A) and C)

Question 14

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Accepted Answer

A) True 
 B)False

Question 15

In what way would life be different if the element carbon was absent?

Accepted Answer

A)   There would be no inorganic compounds.
B)   There would be no organic compounds.
C)   Life would not exist in any shape or form.
D)   The concept of pH would not exist.E) A) and D)
F) B) and C)

Question 16

The lipid group that is the major component of cell membranes is the ______.

Accepted Answer

A)   steroids
B)   prostaglandins
C)   waxes
D)   phospholipids
E)   triglyceridesF) B) and C)
G) A) and B)

Question 17

Polar molecules have more reactivity compared to nonpolar molecules.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following would have glycosidic bonds?

Accepted Answer

A)   Triglycerides
B)   Polysaccharides
C)   ATP
D)   Polypeptides
E)   MonosaccharidesF) C) and D)
G) C) and E)

Question 19

The important solvent associated with living things is ______.

Accepted Answer

A)   ethyl alcohol
B)   benzene
C)   water
D)   sodium chloride
E)   carbon dioxideF) B) and D)
G) A) and B)

Question 20

Most biochemical macromolecules are polymers, which are chains of ______.

Accepted Answer

A)   repeating carbohydrates
B)   hydrophobic molecules
C)   electrolytic molecules
D)   hydrogen bonds
E)   repeating monomersF) B) and C)
G) B) and D)

Exam 2: The Chemistry of Biology

The lipid group that serves as energy storage molecules is the ______.

Correct AnswerverifiedShow Answer

Which of the following represents a reversible reaction?

Correct AnswerverifiedShow Answer

In what way would life be different if the element carbon was absent?

Correct AnswerverifiedShow Answer

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Correct AnswerverifiedShow Answer

The important solvent associated with living things is ______.

Correct AnswerverifiedShow Answer

Characteristics shared by all cells include _______.

Correct AnswerverifiedShow Answer

Which of the following is a correct description of a component of the ATP molecule?

Correct AnswerverifiedShow Answer

Most biochemical macromolecules are polymers, which are chains of ______.

Correct AnswerverifiedShow Answer

In the cell cytoplasm, molecules of ATP are a ______.

Correct AnswerverifiedShow Answer

Substances that release ions when dissolved in water and conduct electricity are ______.

Correct AnswerverifiedShow Answer

Polar molecules have more reactivity compared to nonpolar molecules.

Correct AnswerverifiedShow Answer

The purine ______ always hydrogen bonds with the pyrimidine ______ in double-stranded DNA.

Correct AnswerverifiedShow Answer

The most important outcome of polypeptide intrachain bonding and folding is the unique shape of the protein.

Correct AnswerverifiedShow Answer

All proteins are enzymes.

Correct AnswerverifiedShow Answer

Which of the following would have glycosidic bonds?

Correct AnswerverifiedShow Answer

A culture of an organism believed to cause intestinal symptoms is viewed under the microscope, and the microbiologist observes a cell membrane, ?agella, mitochondria, and some dark unrecognizable structures within each cell. The microbiologist notes that the cells are eukaryotic because _______.

Correct AnswerverifiedShow Answer

Which pertains to DNA but not to RNA?

Correct AnswerverifiedShow Answer

Hydrogen bonds _______.

Correct AnswerverifiedShow Answer

An example of an amphipathic molecule found in living cells is ______.

Correct AnswerverifiedShow Answer

The lipid group that is the major component of cell membranes is the ______.

Correct AnswerverifiedShow Answer

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The purine always hydrogen bonds with the pyrimidine in double-stranded DNA.

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