Question 1

According to the fluid mosaic model of the cell membrane,

Accepted Answer

A)   protein molecules that perform important cellular functions float in a lipid bilayer.
B)   there is a double protein layer in the plasma membrane.
C)   there are fats floating in the protein layer.
D)   carbohydrates function as membrane channels.
E)   nonpolar ends of phospholipids are exposed to water inside and outside the cell.F) C) and D)
G) A) and D)

Question 2

During the process of mitosis in humans,

Accepted Answer

A)   centrioles are points of attachment between chromatids.
B)   replication of DNA during interphase produces identical chromatids.
C)   when centromeres separate, there are two identical sets of 23 chromosomes.
D)   four daughter cells are produced from one original cell.
E)   All of these events will occur.F) A) and B)
G) B) and E)

Question 3

If all of the peroxisomes in a cell were suddenly removed, how would this affect its immediate activity and function?

Accepted Answer

A)   The cell would no longer be able to break down glucose.
B)   The cell would be unable to produce proteins.
C)   The cell would be unable to perform transcription.
D)   The cell would no longer be able to break down fatty acids, hydrogen peroxide, and amino acids.
E)   The cell would no longer be able to break down proteins and nucleic acids.F) A) and B)
G) A) and E)

Question 4

A cell examined under the microscope shows large amounts of rough endoplasmic reticulum, many Golgi apparatuses, and many secretory vesicles. To which of the following tissues would this cell most likely belong?

Accepted Answer

A)   bone
B)   muscle
C)   mammary gland
D)   blood
E)   fatF) C) and D)
G) All of the above

Question 5

A selective poison that blocked the function of the mitochondria was used on a group of cells. Which of the following processes would most likely be interrupted by the presence of this poison?

Accepted Answer

A)   diffusion
B)   osmosis
C)   facilitated diffusion
D)   active transport
E)   all of theseF) A) and C)
G) All of the above

Question 6

In _____________ molecules show a net movement from greater to lesser concentration due to the random motion of the molecules.

Accepted Answer

A)   simple diffusion
B)   exocytosis
C)   facilitated diffusion
D)   active transport
E)   endocytosisF) All of the above
G) D) and E)

Question 7

Osmosis

Accepted Answer

A)   involves the diffusion of solute particles.
B)   can cause a cell to shrink when placed in a hypotonic solution.
C)   occurs through a selectively permeable membrane.
D)   can cause a cell to rupture when placed in a hypertonic solution.
E)   can cause a cell to shrink when placed in a hypotonic solution and can cause a cell to rupture when placed in a hypertonic solution.F) A) and E)
G) C) and E)

Question 8

Peroxisomes break down unwanted matrials in the cell by using hydrogen peroxide.

Accepted Answer

A) True 
 B)False

Question 9

When a cell prepares to divide:

Accepted Answer

A)   the DNA is loosely coiled into chromatin and is visible when viewed with a microscope
B)   the nucleoli appear and become larger
C)   the DNA is tightly coiled into structures called ribosomes
D)   the chromosomes become tightly coiled and are visible when viewed with a microscope
E)   the nuclear envelope appearsF) D) and E)
G) B) and E)

Question 10

Moveable projections from the surface of cells found in abundance in the respiratory tract are

Accepted Answer

A)   flagella.
B)   cilia.
C)   centrioles.
D)   microvilli.
E)   nucleoli.F) A) and E)
G) A) and D)

Question 11

Which of the following cell organelles is NOT correctly matched with its function?

Accepted Answer

A)   nucleus - contains genes that determine the structure and function of each cell
B)   lysosome - contains digestive enzymes
C)   mitochondria - site of protein synthesis
D)   Golgi apparatus - packages proteins in secretory vesicles
E)   smooth ER - site of lipid synthesisF) D) and E)
G) A) and B)

Question 12

The sperm cell is able to move (is motile)  because of its

Accepted Answer

A)   numerous cilia.
B)   microvilli.
C)   flagellum.
D)   numerous lysosomes.
E)   active transport mechanism.F) A) and B)
G) C) and E)

Question 13

Which of the following statements concerning solutes and solvents is true?

Accepted Answer

A)   The solvent is the predominant liquid or gas in a solution.
B)   At equilibrium, all solute particles cease movement.
C)   When oxygen is present in the blood, blood is the solute and oxygen is the solvent.
D)   All solute particles move into or out of the cell by diffusion.
E)   All of these are correct.F) C) and D)
G) None of the above

Question 14

In cotransport

Accepted Answer

A)   no ATP is used.
B)   the diffusing substance moves in the opposite direction as the transported substance.
C)   the diffusing substance moves in the same direction as the transported substance.
D)   the substance moves directly through the cell membrane without the aid of proteins.
E)   None of these choices are accurate for cotransport.F) A) and E)
G) All of the above

Question 15

This diagram best shows a cell during _________ of mitosis.

Accepted Answer

A)   anaphase
B)   metaphase
C)   prophase
D)   telophaseE) B) and C)
F) All of the above

Question 16

Active transport

Accepted Answer

A)   can move substances against their concentration gradient.
B)   requires metabolic energy (ATPs) .
C)   may exchange one substance for another.
D)   involves carrier molecules.
E)   All of these are characteristics of active transport.F) D) and E)
G) A) and C)

Question 17

Cell membranes are said to be selectively permeable because they

Accepted Answer

A)   allow the free passage of some materials and restrict the passage of others.
B)   allow the passage of materials in one direction but not the other.
C)   permit the passage of most materials but not of water.
D)   Cell membranes are NOT normally selectively permeable.E) A) and D)
F) A) and C)

Question 18

_____________ is an example of a molecule that can directly pass through the phospholipids bilayer of the plasma membrane.

Accepted Answer

A)   Carbon dioxide
B)   Potassium
C)   Sodium
D)   Glucose
E)   CalciumF) B) and C)
G) B) and E)

Question 19

A cell that was producing large amounts of lipoproteins (proteins combined with lipids)  for secretion from the cell would have large numbers of

Accepted Answer

A)   lysosomes.
B)   Golgi apparatus.
C)   centrioles.
D)   membrane transporters.
E)   all of these structures.F) B) and E)
G) All of the above

Question 20

This diagram best shows a cell during _________ of mitosis.

Accepted Answer

A)   anaphase
B)   metaphase
C)   prophase
D)   telophaseE) A) and B)
F) All of the above

Exam 3: Cell Structures and Their Functions

Which of the following cell organelles is NOT correctly matched with its function?

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_____________ is an example of a molecule that can directly pass through the phospholipids bilayer of the plasma membrane.

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Osmosis

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The sperm cell is able to move (is motile) because of its

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According to the fluid mosaic model of the cell membrane,

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A selective poison that blocked the function of the mitochondria was used on a group of cells. Which of the following processes would most likely be interrupted by the presence of this poison?

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In _____________ molecules show a net movement from greater to lesser concentration due to the random motion of the molecules.

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In cotransport

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When a cell prepares to divide:

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Moveable projections from the surface of cells found in abundance in the respiratory tract are

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This diagram best shows a cell during _________ of mitosis.

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This diagram best shows a cell during _________ of mitosis.

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If all of the peroxisomes in a cell were suddenly removed, how would this affect its immediate activity and function?

Correct AnswerverifiedShow Answer

During the process of mitosis in humans,

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Active transport

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A cell examined under the microscope shows large amounts of rough endoplasmic reticulum, many Golgi apparatuses, and many secretory vesicles. To which of the following tissues would this cell most likely belong?

Correct AnswerverifiedShow Answer

Which of the following statements concerning solutes and solvents is true?

Correct AnswerverifiedShow Answer

A cell that was producing large amounts of lipoproteins (proteins combined with lipids) for secretion from the cell would have large numbers of

Correct AnswerverifiedShow Answer

Cell membranes are said to be selectively permeable because they

Correct AnswerverifiedShow Answer

Peroxisomes break down unwanted matrials in the cell by using hydrogen peroxide.

Correct AnswerverifiedShow Answer

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