Question 1

X-rays can be used to view bones because

Accepted Answer

A)   x-rays can not pass through bone.
B)   x-rays pass through bone.
C)   x-rays react with bone.
D)   bones are less dense than soft tissue.E) All of the above
F) B) and D)

Question 2

What molecule is produced as a waste product of the metabolism of glucose by cells?

Accepted Answer

A)   water
B)   oxygen
C)   carbon monoxide
D)   nitrogen
E)   carbon dioxideF) A) and C)
G) C) and E)

Question 3

A cation is

Accepted Answer

A)   a molecule that conducts electricity when placed in solution.
B)   an alteration in the three-dimensional structure of a protein.
C)   a positively charged ion.
D)   a combination of atoms held together by chemical bonds.
E)   a negatively charged ion.F) B) and D)
G) A) and D)

Question 4

DNA

Accepted Answer

A)   contains the sugar deoxyribose.
B)   assembles amino acids to make proteins..
C)   is one of several amino acids.
D)   must travel to ribosomes to function.
E)   is a single-stranded molecule.F) None of the above
G) C) and E)

Question 5

Identify the material that would NOT be considered an important inorganic substances in our bodies.

Accepted Answer

A)   carbon
B)   iron
C)   calcium
D)   oxygenE) None of the above
F) B) and C)

Question 6

Which of the following is the correct complementary strand to CATGTC?

Accepted Answer

A)   GUACAG
B)   TCGTAT
C)   CATGTC
D)   GTACAG
E)   AGCACAF) B) and D)
G) A) and E)

Question 7

In the reversible reaction, CO2 + H2O  ↔\harr↔ H2CO3  ↔\harr↔ H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?

Accepted Answer

A)   H+ will decrease.
B)   H+ will increase.
C)   H+ will be unchanged. D) A) and B)
E) A) and C)

Question 8

Which of the following organic groups does hemoglobin belong to?

Accepted Answer

A)   nucleic acid
B)   vitamin
C)   lipid
D)   protein
E)   carbohydrateF) A) and B)
G) A) and C)

Question 9

A substance that will increase the rate of a chemical reaction without being permanently changed is called a/an

Accepted Answer

A)   oxidator.
B)   reducing agent.
C)   catalyst.
D)   solute.E) A) and C)
F) C) and D)

Question 10

Solution A increases its acidity. This means that the

Accepted Answer

A)   pH of the solution has increased.
B)   number of hydrogen ions has increased.
C)   solution is closer to neutrality.
D)   solution will now accept more protons.
E)   number of hydrogen ions has decreased.F) B) and E)
G) A) and C)

Question 11

Electrons

Accepted Answer

A)   are the subatomic particles most involved in bonding behavior of atoms.
B)   have a positive charge of one.
C)   comprise the majority of the mass of an atom.
D)   do not participate in the bonding of atoms.
E)   are located in the nucleus of an atom.F) C) and D)
G) A) and B)

Question 12

-Phospholipids are important components of the plasma membrane. What does "E" represent on the diagram?

Accepted Answer

A)   phosphorus
B)   oxygen
C)   nitrogen
D)   polar (hydrophilic)  region
E)   nonpolar (hydrophobic)  regionF) A) and B)
G) A) and E)

Question 13

Which of the following nitrogen bases is found in RNA but not DNA?

Accepted Answer

A)   cytosine
B)   adenine
C)   thymine
D)   uracil
E)   guanineF) A) and B)
G) A) and C)

Question 14

Which of the following organic groups does DNA belong to?

Accepted Answer

A)   protein
B)   lipid
C)   nucleic acid
D)   carbohydrate
E)   vitaminF) B) and C)
G) A) and E)

Question 15

In ionic bonding,

Accepted Answer

A)   electrons are transferred from one atom to another.
B)   the charge of the ion does not play a role in the bond.
C)   only non-polar molecules are involved.
D)   two hydrogen atoms share one pair of electrons.
E)   a "sea of electrons" forms.F) B) and C)
G) D) and E)

Question 16

A buffer will

Accepted Answer

A)   enhance changes in the pH of the solutions.
B)   make a solution more acidic.
C)   make a solution more basic.
D)   have no effect on the pH of the solutions.
E)   resist drastic changes in the pH of the solutions.F) None of the above
G) B) and E)

Question 17

If the ratio of products and reactants are stable, the system is in _______.

Accepted Answer

A)   activation
B)   steady state
C)   equilibriumD) None of the above
E) All of the above

Question 18

Which of the following chemical reactions best represents the decomposition of ATP?

Accepted Answer

A)   ATP + ADP  →\rightarrow→ ATP
B)   ATP + energy  →\rightarrow→  ADP + H2O
C)   ATP + H2O  →\rightarrow→  ADP + Pi + energy
D)   ADP + ADP + ADP →\rightarrow→  ATP
E)   ADP + Pi + energy  →\rightarrow→  ATP + H2O F) B) and C)
G) C) and D)

Question 19

The three forms of matter are:

Accepted Answer

A)   air, water, and solids.
B)   solids, liquids, and gases.
C)   blood, bone, and air.
D)   vapor, water, and solid.E) None of the above
F) A) and B)

Question 20

Which of the following is an organic compound?

Accepted Answer

A)   hydrochloric acid (HCl) 
B)   salt (NaCl) 
C)   sucrose (C12H22O11) 
D)   water (H2O) 
E)   None of these choices are correct.F) A) and E)
G) None of the above

Exam 2: The Chemical Basis of Life

Electrons

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Solution A increases its acidity. This means that the

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X-rays can be used to view bones because

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If the ratio of products and reactants are stable, the system is in _______.

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Identify the material that would NOT be considered an important inorganic substances in our bodies.

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What molecule is produced as a waste product of the metabolism of glucose by cells?

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Which of the following chemical reactions best represents the decomposition of ATP?

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Which of the following is an organic compound?

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Which of the following organic groups does DNA belong to?

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The three forms of matter are:

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A buffer will

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In ionic bonding,

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Which of the following is the correct complementary strand to CATGTC?

Correct AnswerverifiedShow Answer

In the reversible reaction, CO2 + H2O ↔\harr↔ H2CO3 ↔\harr↔ H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?

Correct AnswerverifiedShow Answer

-Phospholipids are important components of the plasma membrane. What does "E" represent on the diagram?

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A cation is

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DNA

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A substance that will increase the rate of a chemical reaction without being permanently changed is called a/an

Correct AnswerverifiedShow Answer

Which of the following organic groups does hemoglobin belong to?

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Which of the following nitrogen bases is found in RNA but not DNA?

Correct AnswerverifiedShow Answer

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In the reversible reaction, CO₂ + H₂O $\harr$ H₂CO₃ $\harr$ H⁺ + HCO₃- , a decrease in respiration rate will increase the concentration of CO₂ in the blood. What will this do to the amount of H⁺ in the blood?

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