Question 1

What part of a phospholipid comprises the hydrophobic tail?

Accepted Answer

A)  Alcohol
B)  Hydroxyl
C)  Phosphate
D)  Glycerol
E)  Fatty acidsF) B) and E)
G) A) and C)

Question 2

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 D)
G) A) and B)

Question 3

Which pertains to DNA but not to RNA?

Accepted Answer

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

Question 4

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 D)
G) B) and D)

Question 5

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) B) and D)
G) D) and E)

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

An atom has gained an electron; it has been ______.

Accepted Answer

A)  ionized
B)  oxidized
C)  neutralized
D)  reduced
E)  deionizedF) C) and E)
G) A) and B)

Question 8

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

Accepted Answer

A)  triglycerides
B)  prostaglandins
C)  steroids
D)  phospholipids
E)  waxesF) B) and C)
G) None of the above A

Question 9

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

Accepted Answer

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

Question 10

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) All of the above
G) B) and D)

Question 11

What type of bond is formed by dehydration synthesis between two amino acids?

Accepted Answer

A)  Ester
B)  Peptide
C)  Phosphate
D)  Disulfide
E)  GlycosidicF) B) and C)
G) C) and D)

Question 12

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

Accepted Answer

A)  phospholipid
B)  nucleic acid
C)  protein
D)  ATP
E)  glucoseF) A) and B)
G) A) and C)

Question 13

C6H12O6 + C6H12O6  →\rarr→  C12 H22O11 + H2O represents

Accepted Answer

A)  the formation of a polysaccharide.
B)  the formation of a peptide bond.
C)  a decomposition reaction.
D)  a denaturation reaction.
E)  a dehydration synthesis. F) B) and E)
G) B) and D)

Question 14

All of the following are monosaccharides except ______.

Accepted Answer

A)  glycogen
B)  fructose
C)  glucose
D)  deoxyriboseE) B) and D)
F) B) and C)

Question 15

Covalent bonds

Accepted Answer

A)  result from gaining electrons.
B)  are always nonpolar.
C)  result from losing electrons.
D)  are always polar.
E)  result from sharing electrons.F) A) and D)
G) D) and E)

Question 16

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 17

A covalent bond is formed between an anion and a cation.

Accepted Answer

A) True 
 B)False  False

Question 18

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) A) and B)
G) B) and E)

Question 19

The electrons of an atom are

Accepted Answer

A)  moving in pathways called orbitals.
B)  used to determine atomic number.
C)  positively charged.
D)  always equal to the number of neutrons in an atom.
E)  found in the nucleus.F) B) and E)
G) A) and E)

Question 20

Purines and pyrimidines are components in the building block units of all ______.

Accepted Answer

A)  amino acids
B)  polysaccharides
C)  carbohydrates
D)  enzymes
E)  nucleic acidsF) B) and E)
G) A) and B)

Exam 2: The Chemistry of Biology

What part of a phospholipid comprises the hydrophobic tail?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which pertains to DNA but not to RNA?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The valence number is the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An atom has gained an electron; it has been ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

What type of bond is formed by dehydration synthesis between two amino acids?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

C6H12O6 + C6H12O6 →\rarr→ C12 H22O11 + H2O represents

Correct AnswerverifiedShow Answer

All of the following are monosaccharides except ______.

Correct AnswerverifiedShow Answer

Covalent bonds

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

A covalent bond is formed between an anion and a cation.

Correct AnswerverifiedFalse

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

Correct AnswerverifiedShow Answer

The electrons of an atom are

Correct AnswerverifiedShow Answer

Purines and pyrimidines are components in the building block units of all ______.

Correct AnswerverifiedShow Answer

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A

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C₆H₁₂O₆ + C₆H₁₂O₆ $\rarr$ C₁₂ H₂₂O₁₁ + H₂O represents

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False

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