Question 1

Ca3(PO4) 2 represents a/an

Accepted Answer

A)   element.
B)   mixture.
C)   compound.
D)   isotope.
E)   atom.F) B) and C)
G) B) and E)

Question 2

William noticed water mysteriously climbing up a capillary tube. This is an example of which property of water?

Accepted Answer

A)   Frozen water is less dense than liquid water.
B)   The temperature of liquid water rises and falls slowly.
C)   Water molecules are cohesive.
D)   Water has a high heat of vaporization.
E)   Water is a solvent.F) A) and C)
G) D) and E)

Question 3

Which level of protein structure is characterized by alpha and beta sheets in which hydrogen bonding holds the shape in place?

Accepted Answer

A)   secondary structure
B)   primary structure
C)   tertiary structure
D)   quaternary structure
E)   pentagonal structureF) A) and D)
G) C) and D)

Question 4

The reason water is polar is because

Accepted Answer

A)   in polar molecules atoms share electrons evenly.
B)   the oxygen atom is larger than the hydrogen atom.
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) All of the above
G) C) and E)

Question 5

The presence of a buffer in our blood is an example of homeostasis.

Accepted Answer

A) True 
 B)False

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) B) and C)
G) None of the above

Question 7

A fatty acid that contains only single bonds between the carbon atoms is considered

Accepted Answer

A)   saturated.
B)   unsaturated.
C)   trans unsaturated.
D)   a cholestrol.
E)   a steroid.F) C) and D)
G) All of the above

Question 8

Starch, cellulose, and glycogen are alike in that

Accepted Answer

A)   they are all made of glucose.
B)   they contain the same number of side chains.
C)   they have the same types of bonds between the monomer units.
D)   they are all found in animals.
E)   they can all be digested by our bodies.F) A) and B)
G) A) and C)

Question 9

What passes through the digestive tract as fiber or roughage?

Accepted Answer

A)   Maltose
B)   Glucose
C)   Glycogen
D)   Starch
E)   CelluloseF) A) and E)
G) A) and C)

Question 10

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

Accepted Answer

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

Question 11

Fats are usually of animal origin while oils are usually of plant origin.

Accepted Answer

A) True 
 B)False

Question 12

Why does a protein not function after it has been denatured?

Accepted Answer

A)   The normal bonding between the R groups has been disturbed and the protein loses its normal shape.
B)   The normal bonding between the beta sheets has been disturbed and the protein loses its normal shape.
C)   The normal bonding between the hydrogens in the alpha helix has been disturbed and the protein loses its normal shape.
D)   The R groups form additional bonds causing the structure to become more compact.
E)   The normal peptide bonds are ruptured and the individual amino acids are not held together any more.F) B) and E)
G) B) and D)

Question 13

Hydrogen bonds

Accepted Answer

A)   result from the loss of neutrons by an atom.
B)   result in the formation of salts.
C)   involve the loss and gain of electrons.
D)   involve the sharing of electrons.
E)   are relatively weak and can be broken rather easily.F) A) and B)
G) All of the above

Question 14

NaCl is not an organic molecule.

Accepted Answer

A) True 
 B)False

Question 15

In biology, calling something organic means that it was grown without the use of any type of herbicide.

Accepted Answer

A) True 
 B)False

Question 16

Describe the structure and function of the DNA molecule.

Accepted Answer

DNA is composed of a phosphate group, ni...

Question 17

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 E)
G) B) and D)

Question 18

The function of RNA in the body is to store the genetic information in the nucleus.

Accepted Answer

A) True 
 B)False

Question 19

Joining small molecules (monomers)  together to form longer chains (polymers)  requires a process called

Accepted Answer

A)   a hydrolysis reaction.
B)   a dehydration reaction.
C)   monomerization.
D)   emulsification.
E)   disassembly.F) A) and E)
G) A) and D)

Question 20

Which polysaccharide is branched the most?

Accepted Answer

A)   cellulose
B)   starch
C)   glycogen
D)   glucose
E)   fructoseF) All of the above
G) A) and B)

Exam 2: Chemistry of Life

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

William noticed water mysteriously climbing up a capillary tube. This is an example of which property of water?

Correct AnswerverifiedShow Answer

Which level of protein structure is characterized by alpha and beta sheets in which hydrogen bonding holds the shape in place?

Correct AnswerverifiedShow Answer

Hydrogen bonds

Correct AnswerverifiedShow Answer

Which polysaccharide is branched the most?

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The presence of a buffer in our blood is an example of homeostasis.

Correct AnswerverifiedShow Answer

Joining small molecules (monomers) together to form longer chains (polymers) requires a process called

Correct AnswerverifiedShow Answer

What passes through the digestive tract as fiber or roughage?

Correct AnswerverifiedShow Answer

Fats are usually of animal origin while oils are usually of plant origin.

Correct AnswerverifiedShow Answer

A fatty acid that contains only single bonds between the carbon atoms is considered

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The function of RNA in the body is to store the genetic information in the nucleus.

Correct AnswerverifiedShow Answer

Ca3(PO4) 2 represents a/an

Correct AnswerverifiedShow Answer

What makes each amino acid unique?

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Describe the structure and function of the DNA molecule.

Correct AnswerverifiedDNA is composed of a phosphate group, ni...View AnswerShow Answer

Starch, cellulose, and glycogen are alike in that

Correct AnswerverifiedShow Answer

The reason water is polar is because

Correct AnswerverifiedShow Answer

NaCl is not an organic molecule.

Correct AnswerverifiedShow Answer

In biology, calling something organic means that it was grown without the use of any type of herbicide.

Correct AnswerverifiedShow Answer

Why does a protein not function after it has been denatured?

Correct AnswerverifiedShow Answer

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Ca₃(PO₄) ₂ represents a/an

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DNA is composed of a phosphate group, ni...
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