Question 1

Which statement about turgor pressure would be marked wrong on an exam?

Accepted Answer

A)  It occurs in an organism with cell walls when placed into a hypertonic environment.
B)  It is necessary to keep plants from wilting.
C)  It is the force of water against the inside of the cell wall.
D)  It is maintained by osmosis.
E)  It occurs in an organism with cell walls when placed into a hypotonic environment.F) A) and E)
G) None of the above

Question 2

Potential energy is the energy of motion.

Accepted Answer

A) True 
 B)False

Question 3

If a cell contains 95% water in its cytoplasm and the environment surrounding the cell contains 90% water

Accepted Answer

A)  water will flow into the cell by osmosis.
B)  water will flow out of the cell by active transport.
C)  water will flow out of the cell by osmosis.
D)  water will flow into the cell by active transport.
E)  water will flow into the cell by facilitated diffusion.F) C) and D)
G) A) and E)

Question 4

Exergonic reactions do not require activation energy to get started because they release energy.

Accepted Answer

A) True 
 B)False

Question 5

Reduction means

Accepted Answer

A)  the gain of oxygen by a cell.
B)  the loss of oxygen from a cell.
C)  the gain of electrons by an atom or molecule.
D)  the loss of electrons by an atom or molecule.
E)  the loss of protons by an atom or moleculE.F) B) and D)
G) C) and D)

Question 6

Coupled reactions involve one reaction that provides energy to the other.

Accepted Answer

A) True 
 B)False

Question 7

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," why does water leave the cell by osmosis after the active transport of chloride ions out of the cell by CFTR?

Accepted Answer

A)  The cell is now in a hypertonic solution.
B)  The cell is now in a hypotonic solution.
C)  The cell is now in an isotonic solution.
D)  The cell needs to regenerate the ATP used in active transport.
E)  The cell must pump out water to avoid bursting.F) A) and C)
G) C) and D)

Question 8

In which case is the energy involved farthest from being kinetic energy?

Accepted Answer

A)  heat
B)  light
C)  sound
D)  the energy in chemical bonds
E)  random molecular movementF) A) and B)
G) D) and E)

Question 9

If you could create and introduce into cells a chemical that would very specifically denature enzymes involved in digesting phenylalanine,why would patients treated with this drug develop phenylketonuria?

Accepted Answer

A)  They lack an enzyme to break down phenylalanine.
B)  They lack an enzyme to produce phenylalanine.
C)  They produce too much phenylalanine.
D)  They lack an inhibitor of an enzyme to break down phenylalanine.
E)  They eat more phenylalanine than most peoplE.F) A) and B)
G) A) and E)

Question 10

Phagocytosis is

Accepted Answer

A)  an example of exocytosis.
B)  an example of passive transport.
C)  an example of diffusion.
D)  an example of endocytosis.
E)  an example of facilitated diffusion.F) A) and B)
G) A) and E)

Question 11

When electrons are removed from a food molecule,the molecule is

Accepted Answer

A)  reduced.
B)  in equilibrium.
C)  oxidized.
D)  polymerizeD.
E)  conducting an endergonic reaction.F) All of the above
G) B) and D)

Question 12

If you were looking for a card describing the breakdown of glucose to carbon dioxide and water,you would look in a drawer labelled with what information?

Accepted Answer

A)  takes up energy,photosynthesis
B)  takes up energy,cellular respiration
C)  releases energy,photosynthesis
D)  releases energy,cellular respiration
E)  No answer is correctF) A) and B)
G) None of the above

Question 13

Oxidation-reduction reactions

Accepted Answer

A)  transfer electrons from one molecule to another.
B)  are not used by living cells.
C)  transfer protons from one molecule to another.
D)  reduce the amount of oxygen in the cell.
E)  increase the amount of oxygen in the cell.F) B) and E)
G) A) and D)

Question 14

Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.

Accepted Answer

A) True 
 B)False

Question 15

The reactants of photosynthesis are

Accepted Answer

A)  water and carbon dioxide.
B)  organic compounds.
C)  glucose and water.
D)  glucose and carbon dioxide.
E)  glucose and sunlight.F) A) and E)
G) A) and D)

Question 16

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," 1 in 25 Caucasians is a carrier for the defective CFTR gene,making it the most common genetic disease in this population.Why are the frequency of defects in CFTR so common in caucasians?

Accepted Answer

A)  Carriers with one copy of the defective CFTR gene have decreased resistance to cholera compared to those with no defective copies.
B)  These individuals were exposed to cholera,causing mutations in their CFTR gene that can then be passed on to their children.
C)  Carriers will be more likely to have children who develop cystic fibrosis.
D)  Carriers with one copy of the defective CFTR gene have increased resistance to cholera compared to those with no defective copies.
E)  Only carriers would be able to survive exposure to cholera.F) C) and D)
G) A) and E)

Question 17

Noncompetitive inhibition of enzymes

Accepted Answer

A)  occurs when a substance other than the correct substrate binds at the active site of an enzyme.
B)  occurs when a substance binds to an enzyme at a site away from the active site.
C)  occurs by denaturation of an enzyme.
D)  occurs by blocking the production of an enzyme.
E)  occurs when two enzymes bind together.F) D) and E)
G) B) and C)

Question 18

The chemical formula for glucose is

Accepted Answer

A)  C6H6O6.
B)  C12H6O12.
C)  C12H22O11.
D)  C6H6O12.
E)  C6H12O6.F) C) and D)
G) A) and D)

Question 19

If you drop a rubber ball and it does not bounce back to the height you dropped it from.This is consistent with

Accepted Answer

A)  conversion of entropy into potential energy.
B)  energy being neither created nor destroyed.
C)  conversion of kinetic energy into potential energy.
D)  conversion of kinetic energy into entropy.
E)  the tendency to increase disorder.F) C) and D)
G) A) and B)

Question 20

Which statement is least directly connected with the law about energy being preserved?

Accepted Answer

A)  The amount of energy in the universe is constant.
B)  Energy cannot be created or destroyed.
C)  Energy can be converted to other forms of energy.
D)  Any energy transformation loses some energy to its surroundings as heat.
E)  None of the answers are correct.F) A) and B)
G) D) and E)

Exam 4: The Energy of Life

If you could create and introduce into cells a chemical that would very specifically denature enzymes involved in digesting phenylalanine,why would patients treated with this drug develop phenylketonuria?

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Which statement is least directly connected with the law about energy being preserved?

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Potential energy is the energy of motion.

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Exergonic reactions do not require activation energy to get started because they release energy.

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Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.

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If you drop a rubber ball and it does not bounce back to the height you dropped it from.This is consistent with

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In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," 1 in 25 Caucasians is a carrier for the defective CFTR gene,making it the most common genetic disease in this population.Why are the frequency of defects in CFTR so common in caucasians?

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Reduction means

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The chemical formula for glucose is

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Coupled reactions involve one reaction that provides energy to the other.

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The reactants of photosynthesis are

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Noncompetitive inhibition of enzymes

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In which case is the energy involved farthest from being kinetic energy?

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Phagocytosis is

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If a cell contains 95% water in its cytoplasm and the environment surrounding the cell contains 90% water

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When electrons are removed from a food molecule,the molecule is

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If you were looking for a card describing the breakdown of glucose to carbon dioxide and water,you would look in a drawer labelled with what information?

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Which statement about turgor pressure would be marked wrong on an exam?

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In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," why does water leave the cell by osmosis after the active transport of chloride ions out of the cell by CFTR?

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Oxidation-reduction reactions

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