Question 1

Which of the following is a unit of energy?

Accepted Answer

A)  calorie
B)  joule
C)  watt
D)  mole
E)  both choices A and BF) C) and D)
G) B) and D)

Question 2

The ________ of water is caused by the unequal sharing of electrons between oxygen and hydrogen atoms.

Accepted Answer

The answer of The ________ of water is caused by...

Question 3

The polymerization of different types of macromolecules is similar in many respects.Which of the following principles below is least likely to be common to all methods of polymerization of macromolecules?

Accepted Answer

A)  To be added to the polymer, the monomer must be activated.
B)  Macromolecules are synthesized by the addition of monomers.
C)  The polymer is directional.
D)  Polymerization is passive, requiring little ATP.
E)  As monomers are added to the polymer, water is removed from the macromolecule.F) B) and D)
G) C) and D)

Question 4

While synthesizing a new blue pigment,a chemist notices that the new compound congregates between an aqueous (water) environment and a hydrophobic environment.When added to a mixture of oil and water,the pigment creates a blue ring around the droplets of oil.Which of the following statements best describes this new pigment?

Accepted Answer

A)  The pigment is a polar molecule and is forming hydrogen bonds with both the water and oil molecules.
B)  The pigment is hydrophilic and will not form hydrophobic bonds with the oil.
C)  The pigment is amphipathic, having polar and nonpolar regions.
D)  The pigment is neither polar nor nonpolar; it is apolar.
E)  The pigment is probably hydrophobic and is attempting to bond with the oil.F) B) and C)
G) B) and D)

Question 5

Because membranes usually are not permeable to polysaccharides,nucleic acids,and proteins,how are cells able to incorporate these molecules?

Accepted Answer

A)  These macromolecules are only incorporated into structures outside the membrane.
B)  Macromolecules are broken down extracellularly, and their subunits diffuse through the membrane.
C)  Macromolecules are digested extracellularly, and their subunits move through transport proteins.
D)  Macromolecules are transported via endocytosis and are digested within the cell.
E)  both choices C and DF) A) and B)
G) C) and E)

Question 6

Which of the following is not soluble in water?

Accepted Answer

A)  lipids
B)  sugars
C)  amino acids
D)  disaccharides
E)  nucleic acidsF) None of the above
G) B) and E)

Question 7

Which of the following is not a possible noncovalent interaction?

Accepted Answer

A)  hydrogen bonding
B)  ionic bonding
C)  van der Waals interactions
D)  hydrophobic interactions
E)  polar covalent bondingF) B) and D)
G) A) and D)

Question 8

Why is a selectively permeable membrane so important to living things?

Accepted Answer

A)  It allows cells to attach to adjacent tissues.
B)  It provides a good barrier between the inside and outside of the cell.
C)  Proteins will avoid a selectively permeable membrane.
D)  The membrane may absorb several times its weight in cholesterol.
E)  all of the aboveF) None of the above
G) A) and B)

Question 9

Which of the following is not an activated monomer?

Accepted Answer

A)  adenosine triphosphate
B)  glucose-6-phosphate
C)  aminoacyl tRNA
D)  amino acid
E)  uracil triphosphateF) A) and C)
G) B) and E)

Question 10

________ and ________ groups are negatively charged functional groups of carbon,whereas the ________ group is a positively charged functional group.

Accepted Answer

Carboxyl; ...

Question 11

Describe how the amphipathic nature of phospholipids leads to the formation of the phospholipid bilayer organization observed in membrane structure.Based upon this information,how would you design a drug delivery system to cross the cell membrane?

Accepted Answer

Basically,student answers should include...

Question 12

Which of the following molecules is involved with assisted assembly?

Accepted Answer

A)  water molecules
B)  helper proteins
C)  molecular chaperones
D)  tobacco mosaic viruses
E)  none of the aboveF) All of the above
G) A) and E)

Question 13

Which of the following structures will self-assemble?

Accepted Answer

A)  ribosomes
B)  nucleosomes
C)  translocons
D)  huntingtin
E)  all of the aboveF) C) and D)
G) A) and D)

Question 14

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the ________ bond.

Accepted Answer

The answer of The purpose of reducing and oxidizing agents...

Question 15

Water has many unique properties.Can you identify the property of water that is responsible for each of the following observations?
a.Many insects,such as the water strider,are able to move across the surface of water.
b.Most people get chilled immediately after taking a shower.
c.A dime can be made to "float" on the surface of a glass of water.
d.The dime will sink if salt is added to the water.
e.On cold days,the water temperature is often warmer than the surrounding air.
f.Ice forms on the surface of lakes and rivers.
g.Many salts dissolve in water.
h.Many oils will not dissolve in water.
i.The coastal areas of the world have a climate that is more moderate than inland areas.
j.Some springs contain high amounts of arsenic.
k.The Great Salt Lake contains high quantities of mineral solutes.

Accepted Answer

a.Water is cohesive.
b.Water has a high ...

Question 16

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Accepted Answer

A)  Physical conditions would remain the same.
B)  Because water has a high heat of vaporization, the temperatures would rise to the upper extremes.
C)  The temperatures would drop to the lower extremes.
D)  Water would absorb and hold heat and moderate the temperature extremes.
E)  Life would be possible, but it would have to withstand these extremes in temperature.F) A) and E)
G) All of the above

Question 17

As a protein is being synthesized,the correct folding of the protein is aided by the movement of nonpolar amino acids toward the inner areas of the protein.How can this phenomenon be explained?

Accepted Answer

The exclusion of hyd...

Question 18

Biologically,which of the following is the least important characteristic of water?

Accepted Answer

A)  Water molecules are polar.
B)  Water molecules have numerous hydrogen bonds.
C)  Water is a good solvent.
D)  Water typically contains isotopes of hydrogen.
E)  Water has a temperature-stabilizing capacity.F) A) and C)
G) C) and E)

Question 19

Detergents are best able to dissolve oil from fabric or dishes during washing because

Accepted Answer

A)  the positively charged end is associated with a sphere of hydration, while the negatively charged end interacts with the oil droplet.
B)  the negatively charged end is associated with a sphere of hydration, while the positively charged end interacts with the oil droplet.
C)  the nonpolar end is associated with a sphere of hydration, while the charged end interacts with the oil droplet.
D)  the charged end is associated with a sphere of hydration, while the nonpolar end interacts with the oil droplet.
E)  because detergents are nonpolar, they increase the size of the oil droplet, allowing the water to be more effective at removing the oil.F) None of the above
G) A) and D)

Question 20

Self-assembly has been utilized or potentially may be used for all of the following applications except

Accepted Answer

A)  nanotechnology.
B)  electrical conductivity.
C)  biosensors.
D)  drug delivery systems.
E)  All of the above are examples.F) D) and E)
G) A) and C)

Exam 2: The Chemistry of the Cell

Which of the following molecules is involved with assisted assembly?

Correct Answer
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Which of the following is not soluble in water?

Correct Answer
verified

Which of the following is not an activated monomer?

Correct Answer
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Which of the following is not a possible noncovalent interaction?

Correct Answer
verified

Why is a selectively permeable membrane so important to living things?

Correct Answer
verified

Describe how the amphipathic nature of phospholipids leads to the formation of the phospholipid bilayer organization observed in membrane structure.Based upon this information,how would you design a drug delivery system to cross the cell membrane?

Correct Answer
verified
Basically,student answers should include...
View Answer

Detergents are best able to dissolve oil from fabric or dishes during washing because

Correct Answer
verified

Which of the following is a unit of energy?

Correct Answer
verified

As a protein is being synthesized,the correct folding of the protein is aided by the movement of nonpolar amino acids toward the inner areas of the protein.How can this phenomenon be explained?

Correct Answer
verified
The exclusion of hyd...
View Answer

The polymerization of different types of macromolecules is similar in many respects.Which of the following principles below is least likely to be common to all methods of polymerization of macromolecules?

Correct Answer
verified

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Correct Answer
verified

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the ________ bond.

Correct Answer
verified

The ________ of water is caused by the unequal sharing of electrons between oxygen and hydrogen atoms.

Correct Answer
verified

Biologically,which of the following is the least important characteristic of water?

Correct Answer
verified

Self-assembly has been utilized or potentially may be used for all of the following applications except

Correct Answer
verified

Which of the following structures will self-assemble?

Correct Answer
verified

Correct Answer
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Correct Answer
verified
a.Water is cohesive.
b.Water has a high ...
View Answer

Because membranes usually are not permeable to polysaccharides,nucleic acids,and proteins,how are cells able to incorporate these molecules?

Correct Answer
verified

and groups are negatively charged functional groups of carbon,whereas the group is a positively charged functional group.

Correct Answer
verified
Carboxyl; ...
View Answer

Exam 2: The Chemistry of the Cell

Which of the following molecules is involved with assisted assembly?

Correct AnswerverifiedShow Answer

Which of the following is not soluble in water?

Correct AnswerverifiedShow Answer

Which of the following is not an activated monomer?

Correct AnswerverifiedShow Answer

Which of the following is not a possible noncovalent interaction?

Correct AnswerverifiedShow Answer

Why is a selectively permeable membrane so important to living things?

Correct AnswerverifiedShow Answer

Describe how the amphipathic nature of phospholipids leads to the formation of the phospholipid bilayer organization observed in membrane structure.Based upon this information,how would you design a drug delivery system to cross the cell membrane?

Correct AnswerverifiedBasically,student answers should include...View AnswerShow Answer

Detergents are best able to dissolve oil from fabric or dishes during washing because

Correct AnswerverifiedShow Answer

Which of the following is a unit of energy?

Correct AnswerverifiedShow Answer

As a protein is being synthesized,the correct folding of the protein is aided by the movement of nonpolar amino acids toward the inner areas of the protein.How can this phenomenon be explained?

Correct AnswerverifiedThe exclusion of hyd...View AnswerShow Answer

The polymerization of different types of macromolecules is similar in many respects.Which of the following principles below is least likely to be common to all methods of polymerization of macromolecules?

Correct AnswerverifiedShow Answer

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Correct AnswerverifiedShow Answer

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the ________ bond.

Correct AnswerverifiedShow Answer

The ________ of water is caused by the unequal sharing of electrons between oxygen and hydrogen atoms.

Correct AnswerverifiedShow Answer

Biologically,which of the following is the least important characteristic of water?

Correct AnswerverifiedShow Answer

Self-assembly has been utilized or potentially may be used for all of the following applications except

Correct AnswerverifiedShow Answer

Which of the following structures will self-assemble?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answerverifieda.Water is cohesive.b.Water has a high ...View AnswerShow Answer

Because membranes usually are not permeable to polysaccharides,nucleic acids,and proteins,how are cells able to incorporate these molecules?

Correct AnswerverifiedShow Answer

________ and ________ groups are negatively charged functional groups of carbon,whereas the ________ group is a positively charged functional group.

Correct AnswerverifiedCarboxyl; ...View AnswerShow Answer

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Basically,student answers should include...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The exclusion of hyd...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a.Water is cohesive.
b.Water has a high ...
View Answer

Correct Answer
verified

and groups are negatively charged functional groups of carbon,whereas the group is a positively charged functional group.

Correct Answer
verified
Carboxyl; ...
View Answer