Question 1

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

Accepted Answer

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

Question 2

A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Accepted Answer

A)   monounsaturated
B)   unsaturated
C)   polyunsaturated
D)   saturatedE) B) and D)
F) A) and D)

Question 3

Ionic compounds

Accepted Answer

A)   are basic in solution.
B)   are acidic in solution.
C)   are hydrophobic.
D)   are hydrophilic.
E)   always form salts in solution.F) A) and B)
G) A) and C)

Question 4

In the cell cytoplasm,molecules of ATP are a ______.

Accepted Answer

A)   solute
B)   solventC) A) and B)
D) undefined

Question 5

A culture of an organism believed to cause intestinal symptoms is viewed under the microscope,and the microbiologist observes a cell membrane,flagella,mitochondria,and some dark unrecognizable structures within each cell. The microbiologist notes that the cells are eukaryotic because

Accepted Answer

A)   the dark structures must be the cell nuclei.
B)   only eukaryotic cells have a cell membrane.
C)   only eukaryotic cells have flagella.
D)   only eukaryotic cells have mitochondria.E) A) and B)
F) A) and C)

Question 6

A capillary tube is used to acquire a small blood sample for CBC (complete blood count) analysis.Suction is not required to transfer the blood from the fingertip prick to the tube in part due to

Accepted Answer

A)   covalent bonding between the water molecules.
B)   cohesive forces between the glass particles of the tube and the water molecules.
C)   ionic bonding between the water molecules.
D)   adhesive forces between the water molecules and the glass particles of the tube.E) B) and C)
F) C) and D)

Question 7

The building blocks of an enzyme are ______.

Accepted Answer

A)   nucleotides
B)   monosaccharides
C)   amino acids
D)   glycerol and fatty acids
E)   phosphate, glycerol, and fatty acidsF) B) and D)
G) D) and E)

Question 8

Characteristics shared by all cells include

Accepted Answer

A)   a membrane serving as a cell boundary.
B)   the possession of genetic information.
C)   the presence of cellular fluid.
D)   All of the choices are correct.E) A) and D)
F) None of the above

Question 9

Which of the following is not true about enzymes?

Accepted Answer

A)   Enzymes are found in all cells.
B)   Enzymes can be denaturated by heat and other agents.
C)   Enzymes participate in the cell's chemical reactions.
D)   Enzymes have high-energy bonds between phosphates.
E)   Enzymes are catalysts.F) B) and E)
G) All of the above

Question 10

ATP differs from the nucleotides found in DNA in the

Accepted Answer

A)   use of phosphate instead of sulfate in the backbone.
B)   use of phosphorus in the nitrogenous base portion of the molecule.
C)   sugar portion of the molecule.
D)   use of uracil in the nitrogenous base portion of the molecule.
E)   use of adenosine instead of adenine.F) A) and B)
G) C) and E)

Question 11

Burning coal produces sulfur dioxide in the atmosphere.When combined with rain that falls into bodies of water,this leads to

Accepted Answer

A)   a greater concentration of OH- ions in the water.
B)   a decrease in the pH level of the water.
C)   an increase in pH level of the water.
D)   no change in the pH level of the water.E) B) and D)
F) A) and B)

Question 12

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) A) and B)
F) None of the above

Question 13

All of the following are polysaccharides except

Accepted Answer

A)   dextran in some bacterial slime layers.
B)   agar used to make solid culture media.
C)   cellulose in certain cell walls.
D)   sterols in cell membranes.
E)   a cell's glycocalyx.F) C) and E)
G) A) and B)

Question 14

Hydrogen bonds

Accepted Answer

A)   result from attractive forces between molecules with polar covalent bonds.
B)   are the strongest bonds between molecules.
C)   result from attractive forces between molecules with polar ionic bonds.
D)   result from attractive forces between molecules with nonpolar ionic bonds.
E)   result from attractive forces between molecules with nonpolar covalent bonds.F) B) and C)
G) A) and D)

Question 15

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) D) and E)
G) A) and E)

Question 16

The purine ______ always hydrogen bonds with the pyrimidine ______ in double-stranded DNA.

Accepted Answer

A)   cytosine; guanine
B)   thymine; guanine
C)   guanine; cytosine
D)   adenine; guanineE) A) and C)
F) A) and D)

Question 17

All of the following pertain to the atom Carbon-14 except it

Accepted Answer

A)   has 14 neutrons.
B)   is an isotope of carbon.
C)   has 6 protons.
D)   has 6 electrons.E) A) and C)
F) C) and D)

Question 18

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

Accepted Answer

A)   is more basic.
B)   has more H+ ions.
C)   has a higher pH.
D)   has no OH- ions.E) A) and B)
F) C) and D)

Question 19

All of the following are lipids except ______.

Accepted Answer

A)   wax
B)   cholesterol
C)   phospholipid
D)   starch
E)   triglycerideF) None of the above
G) A) and E)

Question 20

The concentration of a solution expresses the amount of solvent present.

Accepted Answer

A) True 
 B)False

Exam 2: The Chemistry of Biology

In the cell cytoplasm,molecules of ATP are a ______.

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Ionic compounds

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

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

Correct AnswerverifiedShow Answer

Burning coal produces sulfur dioxide in the atmosphere.When combined with rain that falls into bodies of water,this leads to

Correct AnswerverifiedShow Answer

The purine ______ always hydrogen bonds with the pyrimidine ______ in double-stranded DNA.

Correct AnswerverifiedShow Answer

All of the following are lipids except ______.

Correct AnswerverifiedShow Answer

A culture of an organism believed to cause intestinal symptoms is viewed under the microscope,and the microbiologist observes a cell membrane,flagella,mitochondria,and some dark unrecognizable structures within each cell. The microbiologist notes that the cells are eukaryotic because

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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Hydrogen bonds

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The concentration of a solution expresses the amount of solvent present.

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All of the following pertain to the atom Carbon-14 except it

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Which of the following is not true about enzymes?

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ATP differs from the nucleotides found in DNA in the

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All of the following are polysaccharides except

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A capillary tube is used to acquire a small blood sample for CBC (complete blood count) analysis.Suction is not required to transfer the blood from the fingertip prick to the tube in part due to

Correct AnswerverifiedShow Answer

The building blocks of an enzyme are ______.

Correct AnswerverifiedShow Answer

Characteristics shared by all cells include

Correct AnswerverifiedShow Answer

A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Correct AnswerverifiedShow Answer

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The purine always hydrogen bonds with the pyrimidine in double-stranded DNA.

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

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