Question 1

Which of the following is not true of proteins?

Accepted Answer

A)   They have both functional and structural roles in the body..
B)   They appear to be the molecular carriers of coded hereditary information.
C)   Their function depends on their three- dimensional shape.
D)   They may be denatured or coagulated by heat or acidity.E) None of the above
F) All of the above

Question 2

Which of the following elements is necessary for proper conduction of nervous impulses?

Accepted Answer

A)   Na
B)   I
C)   Fe
D)   PE) A) and B)
F) All of the above

Question 3

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

Accepted Answer

A) True 
 B)False

Question 4

How can DNA be used to "fingerprint" a suspect in a crime?

Accepted Answer

The DNA of a person is unique to that in...

Question 5

Figure 2.1Using Figure 2.1, match the following:
-have a bitter taste, feel slippery, and are proton acceptors.

Accepted Answer

The answer of  Figure 2.1Using Figure 2.1, match the...

Question 6

31)  You notice that you cannot read your book through a test tube of patient fluid held against the print, making it so blurred as to be unreadable. There is no precipitant in the bottom of the beaker, though it has been sitting for several days in a rack. What type of liquid is this?

Accepted Answer

A)   suspension
B)   colloid
C)   mixture
D)   solutionE) None of the above
F) B) and C)

Question 7

A chemical bond never occurs between components of a mixture. Discuss this.

Accepted Answer

Mixtures come in three forms-solutions, ...

Question 8

The lower the pH, the higher the hydrogen ion concentration.

Accepted Answer

A) True 
 B)False

Question 9

Hydrogen bonds are more like a type of weak than correct bonds.

Accepted Answer

The answer of Hydrogen bonds are more like a type...

Question 10

What is the major difference between polar and nonpolar covalent bonds?

Accepted Answer

Polar bonds have an unequal sharing of e...

Question 11

Choose the answer that best describes HCO3- .

Accepted Answer

A)   a weak acid
B)   a bicarbonate ion
C)   common in the liver
D)   a proton donorE) A) and B)
F) A) and C)

Question 12

Figure 2.1Using Figure 2.1, match the following:
-Nucleotide

Accepted Answer

The answer of  Figure 2.1Using Figure 2.1, match the...

Question 13

Isotopes differ from each other only in the number of electrons the atom contains.

Accepted Answer

A) True 
 B)False

Question 14

The chemical symbol O=O means _ .

Accepted Answer

A)   the atoms are double bonded
B)   this is an ionic bond with two shared electrons
C)   zero equals zero
D)   both atoms are bonded and have zero electrons in the outer orbitE) B) and D)
F) B) and C)

Question 15

A dipeptide can be broken into two amino acids by dehydration synthesis.

Accepted Answer

A) True 
 B)False

Question 16

What happens in redox reactions?

Accepted Answer

A)   the organic substance that loses hydrogen is usually reduced
B)   the electron acceptor is oxidized
C)   the reaction is uniformly reversible
D)   both decomposition and electron exchange occurE) A) and C)
F) A) and B)

Question 17

A chemical reaction in which bonds are broken is usually associated with .

Accepted Answer

A)   a synthesis
B)   forming a larger molecule
C)   the release of energy
D)   the consumption of energyE) A) and D)
F) None of the above

Question 18

The genetic information is coded in DNA by the .

Accepted Answer

A)   regular alteration of sugar and phosphate molecules
B)   arrangement of the histones
C)   three- dimensional structure of the double helix
D)   sequence of the nucleotidesE) A) and D)
F) All of the above

Question 19

Choose the answer that best describes fibrous proteins.

Accepted Answer

A)   are cellular catalysts
B)   are very stable and insoluble in water
C)   are usually called enzymes
D)   rarely exhibit secondary structureE) A) and B)
F) A) and C)

Question 20

What does the formula C6H12O6 mean?

Accepted Answer

A)   The molecular weight is 24.
B)   The substance is a colloid.
C)   There are 6 calcium, 12 hydrogen, and 6 oxygen atoms.
D)   There are, 6 carbon, 12 hydrogen, and 6 oxygen atoms.E) None of the above
F) B) and D)

Exam 2: Chemistry Comes Alive

The genetic information is coded in DNA by the .

Correct AnswerverifiedShow Answer

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

Correct AnswerverifiedShow Answer

Hydrogen bonds are more like a type of weak than correct bonds.

Correct AnswerverifiedShow Answer

The chemical symbol O=O means _ .

Correct AnswerverifiedShow Answer

Choose the answer that best describes HCO3- .

Correct AnswerverifiedShow Answer

A chemical bond never occurs between components of a mixture. Discuss this.

Correct AnswerverifiedMixtures come in three forms-solutions, ...View AnswerShow Answer

Isotopes differ from each other only in the number of electrons the atom contains.

Correct AnswerverifiedShow Answer

How can DNA be used to "fingerprint" a suspect in a crime?

Correct AnswerverifiedThe DNA of a person is unique to that in...View AnswerShow Answer

The lower the pH, the higher the hydrogen ion concentration.

Correct AnswerverifiedShow Answer

What happens in redox reactions?

Correct AnswerverifiedShow Answer

What does the formula C6H12O6 mean?

Correct AnswerverifiedShow Answer

Which of the following elements is necessary for proper conduction of nervous impulses?

Correct AnswerverifiedShow Answer

Choose the answer that best describes fibrous proteins.

Correct AnswerverifiedShow Answer

Figure 2.1Using Figure 2.1, match the following: -Nucleotide

Correct AnswerverifiedShow Answer

What is the major difference between polar and nonpolar covalent bonds?

Correct AnswerverifiedPolar bonds have an unequal sharing of e...View AnswerShow Answer

Figure 2.1Using Figure 2.1, match the following: -have a bitter taste, feel slippery, and are proton acceptors.

Correct AnswerverifiedShow Answer

A dipeptide can be broken into two amino acids by dehydration synthesis.

Correct AnswerverifiedShow Answer

A chemical reaction in which bonds are broken is usually associated with .

Correct AnswerverifiedShow Answer

31) You notice that you cannot read your book through a test tube of patient fluid held against the print, making it so blurred as to be unreadable. There is no precipitant in the bottom of the beaker, though it has been sitting for several days in a rack. What type of liquid is this?

Correct AnswerverifiedShow Answer

Which of the following is not true of proteins?

Correct AnswerverifiedShow Answer

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Choose the answer that best describes HCO₃- .

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Mixtures come in three forms-solutions, ...
View Answer

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The DNA of a person is unique to that in...
View Answer

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Polar bonds have an unequal sharing of e...
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