Question 1

Simple diffusion of molecules occurs

Accepted Answer

A)   from an area of lesser concentration to an area of greater concentration.
B)   in non-living systems as well as living systems.
C)   across plasma membranes only through transport proteins.
D)   until those molecules are more highly concentrated on one side of the plasma membrane.
E)   only in molecules that are in gaseous state.F) A) and C)
G) A) and E)

Question 2

Enzymes are able to speed up the rate of a reaction by

Accepted Answer

A)   carrying substrates closer together.
B)   binding substrates to a membrane.
C)   producing more enzymes.
D)   lowering the energy needed for the reaction to proceed.
E)   producing more substrate.F) B) and E)
G) A) and B)

Question 3

Which of the following is a byproduct of photosynthesis that is used during cellular respiration?

Accepted Answer

A)   oxygen
B)   NADH
C)   carbon dioxide
D)   ATP
E)   FADH2F) A) and B)
G) None of the above

Question 4

When a potted house plant is wilting,the addition of water quickly changes the look of the plant.This can be accounted for by which of the following statements:

Accepted Answer

A)   The water creates a hypertonic environment causing the cells to lose water.
B)   The water creates a hypotonic environment causing cells to lose water.
C)   The water creates a hypertonic environment causing the cells to gain water.
D)   The water creates a hypotonic environment causing the cells to gain water.
E)   The water creates an isotonic environment that allows for the cells to neither gain nor lose water.F) A) and B)
G) A) and C)

Question 5

When a car burns gasoline,much of the energy is in the form of heat as the car is driven.Which of the following best describes this in relation to the first law of thermodynamics?

Accepted Answer

A)   Energy is conserved.
B)   Energy can be changed from one form to another.
C)   Energy is often destroyed.
D)   All energy comes from the sun.
E)   Energy is always used up in reactions.F) A) and E)
G) B) and C)

Question 6

What prevents a plant cell from bursting in a hypotonic solution?

Accepted Answer

A)   plasma membrane
B)   transport proteins which help pump the excess water out of the cell
C)   cell wall
D)   a plant cell will not burst in a hypotonic solution because water is moving out of the cell
E)   the presence of chloroplastsF) A) and B)
G) A) and C)

Question 7

Which is an example of potential rather than kinetic energy?

Accepted Answer

A)   an apple made up of energy-rich macromolecules
B)   a firefly using light flashes to attract a mate
C)   a skier at the bottom of a hill
D)   a pile of leaves that have been burnt
E)   a candle giving off lightF) None of the above
G) A) and D)

Exam 5: The Dynamic Cell

Which is an example of potential rather than kinetic energy?

Correct Answer
verified

When a car burns gasoline,much of the energy is in the form of heat as the car is driven.Which of the following best describes this in relation to the first law of thermodynamics?

Correct Answer
verified

When a potted house plant is wilting,the addition of water quickly changes the look of the plant.This can be accounted for by which of the following statements:

Correct Answer
verified

Simple diffusion of molecules occurs

Correct Answer
verified

Which of the following is a byproduct of photosynthesis that is used during cellular respiration?

Correct Answer
verified

Enzymes are able to speed up the rate of a reaction by

Correct Answer
verified

What prevents a plant cell from bursting in a hypotonic solution?

Correct Answer
verified

Exam 5: The Dynamic Cell

Which is an example of potential rather than kinetic energy?

Correct AnswerverifiedShow Answer

When a car burns gasoline,much of the energy is in the form of heat as the car is driven.Which of the following best describes this in relation to the first law of thermodynamics?

Correct AnswerverifiedShow Answer

When a potted house plant is wilting,the addition of water quickly changes the look of the plant.This can be accounted for by which of the following statements:

Correct AnswerverifiedShow Answer

Simple diffusion of molecules occurs

Correct AnswerverifiedShow Answer

Which of the following is a byproduct of photosynthesis that is used during cellular respiration?

Correct AnswerverifiedShow Answer

Enzymes are able to speed up the rate of a reaction by

Correct AnswerverifiedShow Answer

What prevents a plant cell from bursting in a hypotonic solution?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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