Question 1

Compared to a solution of pH 9,a solution of pH 7 is

Accepted Answer

A)   20 times more basic.
B)   2 times more acidic.
C)   100 times more acidic.
D)   100 times more basic.
E)   20 times more acidic.F) A) and E)
G) A) and B)

Question 2

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

Accepted Answer

A)   Sugar: deoxyribose
B)   Sugar: ribose
C)   Nitrogenous base: alanine
D)   High energy bond: peptide bond
E)   High energy bond: glycosidic bondF) None of the above
G) D) and E)

Question 3

What is the maximum number of electrons in the first energy shell of an atom?

Accepted Answer

A)   2
B)   4
C)   8
D)   18
E)   32F) A) and B)
G) A) and E)

Question 4

The valence number is the

Accepted Answer

A)   number of protons.
B)   atomic weight.
C)   number of neutrons.
D)   number of electrons in the innermost orbital.
E)   number of electrons in the outermost orbital.F) A) and B)
G) B) and E)

Question 5

The alpha ( α\alphaα ) helix is a type of _____ protein structure.

Accepted Answer

A)   primary
B)   secondary
C)   tertiary
D)   quaternary E) All of the above
F) B) and C)

Question 6

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

Accepted Answer

A)   waxes
B)   steroids
C)   prostaglandins
D)   triglycerides
E)   phospholipidsF) C) and E)
G) A) and B)

Question 7

The electrons of an atom are

Accepted Answer

A)   used to determine the atomic weight.
B)   always equal to the number of protons.
C)   carrying a positive charge.
D)   always in full orbitals.
E)   used to determine the atomic number.F) A) and D)
G) D) and E)

Question 8

Which of the following statements is incorrect regarding protein structure?

Accepted Answer

A)   Proteins, such as antibodies that are comprised of multiple polypeptide chains, have quaternary structure.
B)   The folding of a protein to form its active site creates its tertiary structure.
C)   Beta-pleated sheets are a type of protein secondary structure.
D)   The sequence of nucleotides determines the primary structure of a protein.E) A) and B)
F) A) and C)

Question 9

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

Accepted Answer

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

Question 10

Nucleic acids have primary,secondary,tertiary,and quaternary levels of organization.

Accepted Answer

A) True 
 B)False

Question 11

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Accepted Answer

A)   oxygen
B)   phosphorous
C)   nitrogen
D)   hydrogen
E)   carbonF) B) and D)
G) B) and E)

Question 12

One nucleotide contains one

Accepted Answer

A)   phosphate.
B)   pentose sugar.
C)   nitrogen base.
D)   All of the choices are correct.E) B) and C)
F) C) and D)

Question 13

Which of the following functional groups is mismatched to the organic compound in which it is typically found?

Accepted Answer

A)   Carboxyl - fatty acids
B)   Amino - proteins
C)   Hydroxyl - alcohols
D)   Sulfhydryl - proteins
E)   Phosphate - carbohydratesF) A) and E)
G) C) and D)

Question 14

A new organism was identified that contained arsenic in place of phosphate in its DNA double helix structure.Based upon this information alone,it can be determined that this change will greatly alter the information encoded by this genetic material.

Accepted Answer

A) True 
 B)False

Question 15

An amino acid contains all of the following except a/n ______.

Accepted Answer

A)   phosphate
B)    α\alphaα  carbon
C)   carboxyl group
D)   variable R group
E)   amino group F) A) and B)
G) A) and C)

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

NASA has published a list of criteria for identifying fossil bacteria in samples from Mars,as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells?

Accepted Answer

A)   Three-dimensional organization of cells in a starburst pattern
B)   No evidence of water in the surrounding mineral
C)   Cell size of 0.5 to 2 microns
D)   Absence of carbon in the materialE) A) and B)
F) B) and C)

Question 18

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

Accepted Answer

A)   covalent
B)   solvents
C)   nonpolar
D)   electrons
E)   electrolytesF) A) and E)
G) B) and E)

Question 19

The important solvent associated with living things is ______.

Accepted Answer

A)   benzene
B)   sodium chloride
C)   water
D)   carbon dioxide
E)   ethyl alcoholF) B) and D)
G) B) and C)

Question 20

All of the following are monosaccharides except ______.

Accepted Answer

A)   glycogen
B)   fructose
C)   glucose
D)   deoxyriboseE) All of the above
F) A) and C)

Exam 2: The Chemistry of Biology

One nucleotide contains one

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The electrons of an atom are

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NASA has published a list of criteria for identifying fossil bacteria in samples from Mars,as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells?

Correct AnswerverifiedShow Answer

Compared to a solution of pH 9,a solution of pH 7 is

Correct AnswerverifiedShow Answer

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

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Nucleic acids have primary,secondary,tertiary,and quaternary levels of organization.

Correct AnswerverifiedShow Answer

A new organism was identified that contained arsenic in place of phosphate in its DNA double helix structure.Based upon this information alone,it can be determined that this change will greatly alter the information encoded by this genetic material.

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect regarding protein structure?

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The important solvent associated with living things is ______.

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What is the maximum number of electrons in the first energy shell of an atom?

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All of the following are monosaccharides except ______.

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

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The valence number is the

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The alpha ( α\alphaα ) helix is a type of _____ protein structure.

Correct AnswerverifiedShow Answer

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An amino acid contains all of the following except a/n ______.

Correct AnswerverifiedShow Answer

Which of the following functional groups is mismatched to the organic compound in which it is typically found?

Correct AnswerverifiedShow Answer

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The alpha ( $\alpha$ ) helix is a type of _____ protein structure.

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