Question 1

White blood cells engulf foreign particles by means of

Accepted Answer

A)   macrocytosis.
B)   pinocytosis.
C)   exocytosis.
D)   phagocytosis.
E)   prestocytosis.F) A) and C)
G) A) and B)

Question 2

In the nucleus, DNA is wrapped with proteins. This complex is called

Accepted Answer

A)   chromatin.
B)   cytoplasmic organelles.
C)   DNA particles.
D)   nucleoli.
E)   a DNA wrap.F) A) and C)
G) All of the above

Question 3

If the amino acid coding region of a mRNA molecule is 1800 nucleotides (bases)  in length, this molecule will contain _____ codons.

Accepted Answer

A)   400
B)   600
C)   800
D)   900
E)   1200F) A) and D)
G) A) and B)

Question 4

Which of the following is NOT a characteristic function of a cell?

Accepted Answer

A)   reproduction and inheritance
B)   metabolism and energy use
C)   movement
D)   synthesis
E)   communicationF) C) and E)
G) A) and B)

Question 5

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

Accepted Answer

A)   directs cellular activities, contains DNA
B)   contains digestive enzymes
C)   outer boundary of cell, controls entry and exit of substances
D)   major site of ATP synthesis when oxygen is available
E)   site of protein synthesisF) B) and E)
G) A) and E)

Question 6

Endoplasmic reticulum with ribosomes attached to it is called

Accepted Answer

A)   smooth ER.
B)   dendritic ER.
C)   nodular ER.
D)   bumpy ER.
E)   rough ER.F) A) and D)
G) A) and E)

Question 7

Osmosis is the diffusion of _____ across a selectively permeable membrane.

Accepted Answer

A)   urea
B)   oxygen
C)   water
D)   sodium
E)   sugarF) D) and E)
G) A) and D)

Question 8

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

Accepted Answer

A)   directs cellular activities, contains DNA
B)   contains digestive enzymes
C)   outer boundary of cell, controls entry and exit of substances
D)   major site of ATP synthesis when oxygen is available
E)   site of protein synthesisF) None of the above
G) A) and D)

Question 9

The sodium-potassium pump located in the plasma membrane

Accepted Answer

A)   actively transports potassium into cells.
B)   osmotically moves sodium into cells.
C)   actively transports water out of cells.
D)   moves chlorine out of cells.
E)   actively transports sodium into cells.F) B) and E)
G) A) and E)

Question 10

The organelle that protects cells from the damaging effects of medications and toxins is the

Accepted Answer

A)   ribosome.
B)   microtubule.
C)   secretory vesicle.
D)   smooth endoplasmic reticulum.
E)   mitochondria.F) D) and E)
G) B) and E)

Question 11

The function of the Golgi apparatus is

Accepted Answer

A)   packaging and distribution of proteins and lipids.
B)   production of microtubules.
C)   excretion of excess salt.
D)   DNA replication.
E)   energy production.F) A) and D)
G) D) and E)

Question 12

The transfer of information from DNA to messenger RNA (mRNA)  is known as

Accepted Answer

A)   transduction.
B)   translocation.
C)   translation.
D)   transcription.
E)   transmutation.F) C) and D)
G) C) and E)

Question 13

Which of the following are ciliated cells?

Accepted Answer

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

Question 14

A toxic drug destroyed the Golgi apparatus. This would affect

Accepted Answer

A)   ribosomal RNA synthesis.
B)   intracellular digestion.
C)   energy production.
D)   microtubule production.
E)   packaging of glycoproteins and lipoproteins.F) A) and B)
G) None of the above

Question 15

Which of the following is CORRECTLY matched with its function?

Accepted Answer

A)   channel proteins - are part of an intercellular communication system
B)   marker molecules - are primarily steroids
C)   receptor proteins - attach to ligand molecules
D)   peripheral proteins - penetrate the lipid bilayer from one surface to the other
E)   nongated ion channels - are always closedF) B) and D)
G) D) and E)

Question 16

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) None of the above
G) A) and B)

Question 17

-What structure does "A" represent on the diagram of the plasma membrane?

Accepted Answer

A)   membrane channel protein
B)   phospholipid bilayer
C)   internal membrane surface
D)   peripheral protein
E)   integral proteinF) All of the above
G) A) and D)

Question 18

-Red blood cells (RBCs)  have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "C" relative to the RBC?

Accepted Answer

A)   hypotonic solution
B)   hypertonic solution
C)   isotonic solution
D)   hemolyzed
E)   crenatedF) B) and C)
G) A) and E)

Question 19

According to the most current model of the plasma membrane,

Accepted Answer

A)   cholesterol forms the innermost layer of the membrane.
B)   proteins are free to move about within a double layer of phospholipids.
C)   phospholipids and cholesterol form a single lipid bilayer.
D)   the membrane is a rigid unchanging structure.
E)   the membrane is impermeable to all other molecules.F) C) and E)
G) B) and D)

Question 20

The movement of a substance from an area of high concentration to an area of less concentration is called

Accepted Answer

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

Exam 3: Cell Biology

A toxic drug destroyed the Golgi apparatus. This would affect

Correct AnswerverifiedShow Answer

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

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-What structure does "A" represent on the diagram of the plasma membrane?

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The function of the Golgi apparatus is

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Which of the following is NOT a characteristic function of a cell?

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-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "C" relative to the RBC?

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White blood cells engulf foreign particles by means of

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The organelle that protects cells from the damaging effects of medications and toxins is the

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Endoplasmic reticulum with ribosomes attached to it is called

Correct AnswerverifiedShow Answer

The sodium-potassium pump located in the plasma membrane

Correct AnswerverifiedShow Answer

The movement of a substance from an area of high concentration to an area of less concentration is called

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

Osmosis is the diffusion of _____ across a selectively permeable membrane.

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In the nucleus, DNA is wrapped with proteins. This complex is called

Correct AnswerverifiedShow Answer

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

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According to the most current model of the plasma membrane,

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The transfer of information from DNA to messenger RNA (mRNA) is known as

Correct AnswerverifiedShow Answer

Which of the following are ciliated cells?

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Which of the following is CORRECTLY matched with its function?

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If the amino acid coding region of a mRNA molecule is 1800 nucleotides (bases) in length, this molecule will contain _____ codons.

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