Question 1

The environment outside the plasma membrane is most appropriately referred to as

Accepted Answer

A)   intracellular.
B)   extracellular.
C)   multicellular.
D)   centrocellular.
E)   None of these choices are correct.F) C) and D)
G) B) and D)

Question 2

Salt was added to a beaker of distilled water (the water was not stirred) . A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

Accepted Answer

A)   the difference in the percentage of salt between the top and bottom samples would increase.
B)   the percentage of salt in top and bottom samples would be approximately equal.
C)   the samples would still be 2% and 20% respectively.
D)   the salt would float to the top.
E)   None of these choices are correct.F) D) and E)
G) A) and B)

Question 3

A cell uses centrioles in the process of

Accepted Answer

A)   protein synthesis.
B)   RNA replication.
C)   cell division.
D)   energy generation.
E)   nuclear centering.F) C) and E)
G) C) and D)

Question 4

What term dealing with cancer means "spreading to a new site"?

Accepted Answer

A)   malignant
B)   carcinoma
C)   metastasis
D)   benign
E)   sarcomaF) A) and C)
G) A) and D)

Question 5

Which of the following is NOT true of G-protein complex action?

Accepted Answer

A)   Stimulates a cell by means of extracellular chemical signals.
B)   Stimulates a cell by opening ion channels in the plasma membrane.
C)   Acts as an intermediate between a receptor and other cellular proteins.
D)   Stimulates a cell by activating enzymes associated with the plasma membrane.
E)   Stimulates a cell by means of intracellular chemical signals.F) B) and E)
G) A) and D)

Question 6

All of the following processes can move substances out of a cell EXCEPT

Accepted Answer

A)   diffusion.
B)   phagocytosis.
C)   active transport.
D)   osmosis.
E)   exocytosis.F) B) and E)
G) A) and B)

Question 7

Which of these cells would most likely have the largest number of mitochondria?

Accepted Answer

A)   skin cells
B)   blood cells
C)   fat cells
D)   bone cells
E)   muscle cellsF) A) and B)
G) C) and E)

Question 8

Which of the following events occurs during anaphase?

Accepted Answer

A)   The nuclear envelope degenerates.
B)   Chromosomes migrate to opposite poles of the cell.
C)   Chromatin strands condense to form chromosomes.
D)   Cytokinesis completes.
E)   Spindle fibers are formed.F) D) and E)
G) C) and D)

Question 9

A person suffered burns over a large part of his body. Evaporation of fluid from the surface of burned areas occurs. As a result of the evaporation process, cells will tend to

Accepted Answer

A)   first swell and then resume their original shape.
B)   rupture.
C)   swell.
D)   remain unchanged.
E)   shrink.F) C) and E)
G) B) and E)

Question 10

A group of cells was treated with a proteolytic (protein-digesting)  enzyme. Which of the following processes would be least affected by this treatment?

Accepted Answer

A)   use of carrier molecules in facilitated diffusion
B)   sodium-potassium exchange pump
C)   secondary active transport
D)   diffusion of lipid-soluble molecules through the plasma membrane
E)   diffusion of sodium through sodium membrane channelsF) All of the above
G) A) and E)

Question 11

What is a large, active phagocytic cell?

Accepted Answer

A)   macrophage (large, mobile white blood cell) 
B)   columnar cells of small intestines
C)   red blood cells
D)   spermatozoa
E)   columnar cells of upper respiratory tractF) All of the above
G) D) and E)

Question 12

What is mediated transport?

Accepted Answer

A)   The movement of molecules across a membrane by means of a protein carrier.
B)   The process of peptide synthesis on the surface of the ribosome.
C)   The ability of molecules to pass through the nuclear membrane.
D)   The movement of vesicles by intermediate filaments.E) B) and C)
F) A) and D)

Question 13

Check all that occur at the cellular level as a result of aging.
_____ Cells experience increased metabolic functions.
__X__ Cells experience a decreased ability to maintain homeostasis.
__X__ The process of cell division becomes faulty, resulting in a greater risk for cancer.
_____

Accepted Answer

The risk for unsucce...

Question 14

The greater the concentration of a solution, the greater the

Accepted Answer

A)   osmotic pressure of the solution.
B)   rate of facilitated diffusion.
C)   tendency for water to diffuse from the solution.
D)   number of carrier molecules present.
E)   amount of solvent.F) A) and B)
G) A) and D)

Question 15

A mRNA containing introns is a

Accepted Answer

A)   pre-mRNA.
B)   ribosomal RNA (rRN
A)  .
C)   codon.
D)   proenzyme.
E)   gene.F) B) and D)
G) None of the above

Question 16

The sodium-potassium pump located in the plasma membrane

Accepted Answer

A)   osmotically moves sodium into cells.
B)   actively transports potassium into cells.
C)   actively transports water out of cells.
D)   moves chlorine out of cells.
E)   actively transports sodium into cells.F) None of the above
G) A) and D)

Question 17

What type of membrane proteins allow cells to identify one another?

Accepted Answer

A)   enzymes
B)   carrier proteins
C)   channel protein
D)   receptor proteins
E)   marker moleculesF) C) and D)
G) C) and E)

Question 18

The movement of oxygen from the alveoli of the lungs into the bloodstream is an example of

Accepted Answer

A)   osmosis.
B)   active transport.
C)   bulk transport.
D)   facilitated diffusion.
E)   diffusion.F) B) and E)
G) A) and D)

Question 19

What is the only human cell with a flagellum?

Accepted Answer

A)   red blood cells
B)   macrophage (large, mobile white blood cell) 
C)   spermatozoa
D)   columnar cells of small intestines
E)   columnar cells of upper respiratory tractF) B) and C)
G) A) and E)

Question 20

If 0.9% NaCl (saline)  solution is isotonic to a cell, then a 0.5% saline solution

Accepted Answer

A)   will not affect the cell.
B)   is hypotonic to the cell.
C)   will cause crenation of the cell.
D)   will shrink the cell.
E)   is hypertonic to the cell.F) A) and D)
G) D) and E)

Exam 3: Cell Biology

A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?

Correct AnswerverifiedShow Answer

Check all that occur at the cellular level as a result of aging. _____ Cells experience increased metabolic functions. __X__ Cells experience a decreased ability to maintain homeostasis. __X__ The process of cell division becomes faulty, resulting in a greater risk for cancer. _____

Correct AnswerverifiedThe risk for unsucce...View AnswerShow Answer

The movement of oxygen from the alveoli of the lungs into the bloodstream is an example of

Correct AnswerverifiedShow Answer

What type of membrane proteins allow cells to identify one another?

Correct AnswerverifiedShow Answer

The sodium-potassium pump located in the plasma membrane

Correct AnswerverifiedShow Answer

What is a large, active phagocytic cell?

Correct AnswerverifiedShow Answer

Which of the following events occurs during anaphase?

Correct AnswerverifiedShow Answer

The greater the concentration of a solution, the greater the

Correct AnswerverifiedShow Answer

All of the following processes can move substances out of a cell EXCEPT

Correct AnswerverifiedShow Answer

What is the only human cell with a flagellum?

Correct AnswerverifiedShow Answer

What term dealing with cancer means "spreading to a new site"?

Correct AnswerverifiedShow Answer

Which of the following is NOT true of G-protein complex action?

Correct AnswerverifiedShow Answer

The environment outside the plasma membrane is most appropriately referred to as

Correct AnswerverifiedShow Answer

If 0.9% NaCl (saline) solution is isotonic to a cell, then a 0.5% saline solution

Correct AnswerverifiedShow Answer

What is mediated transport?

Correct AnswerverifiedShow Answer

Salt was added to a beaker of distilled water (the water was not stirred) . A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours

Correct AnswerverifiedShow Answer

Which of these cells would most likely have the largest number of mitochondria?

Correct AnswerverifiedShow Answer

A mRNA containing introns is a

Correct AnswerverifiedShow Answer

A cell uses centrioles in the process of

Correct AnswerverifiedShow Answer

A person suffered burns over a large part of his body. Evaporation of fluid from the surface of burned areas occurs. As a result of the evaporation process, cells will tend to

Correct AnswerverifiedShow Answer

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Check all that occur at the cellular level as a result of aging. _ Cells experience increased metabolic functions. X Cells experience a decreased ability to maintain homeostasis. X The process of cell division becomes faulty, resulting in a greater risk for cancer. _

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The risk for unsucce...
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