Question 1

The plasma membrane contains how many layers of phospholipids?

Accepted Answer

A)   one
B)   two
C)   four
D)   eight
E)   sixteenF) A) and C)
G) D) and E)

Question 2

A solution is at equilibrium across a plasma membrane.If 50 molecules were to enter the cell,how many molecules would need to exit the cell in order to maintain the equilibrium?

Accepted Answer

A)   50
B)   75
C)   25
D)   0
E)   100F) A) and B)
G) None of the above

Question 3

What is the main function of the ribosomes in the cell?

Accepted Answer

A)   to synthesize proteins
B)   to synthesize DNA
C)   to break down proteins into individual amino acids
D)   to form the nuclear envelope
E)   to provide strength and structural support for the cell membrane TheF) B) and E)
G) None of the above

Question 4

The size of a metabolizing cell is limited by its

Accepted Answer

A)   extracellular matrix.
B)   function.
C)   nuclear size.
D)   surface area-to-volume ratio.
E)   genome size.F) D) and E)
G) A) and D)

Question 5

The reason that metabolizing cells are small in size is because

Accepted Answer

A)   cells influence nearby cells to divide.
B)   the surface area of a cell must be able to accomplish nutrient/waste exchange.
C)   cells need to dissipate heat effectively.
D)   mitosis occurs before cells reach a certain size.
E)   cells need to communicate with adjacent cells.F) A) and E)
G) A) and D)

Question 6

Choose the CORRECT statement about solute concentrations or particles inside and outside the cell.

Accepted Answer

A)   In a hypertonic solution, there are more particles inside the cell.
B)   In a hypotonic solution, there are more particles outside the cell.
C)   In an isotonic solution the amount of water inside and outside the cell is equal.
D)   In a hypertonic solution, there is more water outside the cell.
E)   In a hypotonic solution, there is more water inside the cell.F) All of the above
G) None of the above

Question 7

What cellular organelle is especially abundant in phagocytic white blood cells?

Accepted Answer

A)   nuclei
B)   nucleoli
C)   Golgi apparati
D)   lysosomes
E)   ribosomesF) B) and C)
G) A) and E)

Question 8

The first day of football practice was rough on the squad.During practice,the players complained of cramps and sore muscles.Although there is evidence to suggest that many different factors may contribute to this,which of the following is most likely to play a role in the soreness?

Accepted Answer

A)   glucose
B)   alcohol
C)   carbon dioxide
D)   carbon monoxide
E)   lactateF) C) and D)
G) A) and C)

Question 9

The phospholipid bilayer that surrounds/maintains the integrity of a cell is called a

Accepted Answer

A)   plasma membrane.
B)   Sanger enclosure.
C)   hydrophobic membrane.
D)   dialysis membrane.
E)   mosaic membrane.F) None of the above
G) D) and E)

Question 10

Explain the functions of adhesion junctions,gap junctions,and tight junctions in human cells.

Accepted Answer

Adhesion junctions serve to mechanically...

Question 11

What is the function of cholesterol in the plasma membrane?

Accepted Answer

A)   cell marker
B)   receptor
C)   support
D)   channel
E)   enzymeF) None of the above
G) A) and E)

Question 12

In the sodium-potassium pump,sodium and potassium are both pumped out of the cell via active transport.

Accepted Answer

A) True 
 B)False

Question 13

The sum of all of the chemical reactions that occur in a cell collectively are called

Accepted Answer

A)   respiration.
B)   anabolism.
C)   photosynthesis.
D)   metabolism.
E)   reaction summary.F) A) and D)
G) A) and C)

Question 14

Fermentation produces more ATP than does aerobic respiration.

Accepted Answer

A) True 
 B)False

Question 15

In an experiment in the laboratory,a small colored molecule is injected into one cell.Within minutes,the molecule has entered the adjacent cells.What type of junctions connect these cells?

Accepted Answer

A)   gap junctions
B)   free junctions
C)   adhesion junctions
D)   tight junctions
E)   actin junctionsF) A) and E)
G) None of the above

Question 16

Which of the following can cross the plasma membrane because of its selective permeability?

Accepted Answer

A)   gases such as oxygen and carbon dioxide
B)   ions
C)   large, polar molecules
D)   large, nonpolar molecules
E)   glycoproteinsF) A) and D)
G) A) and C)

Question 17

What is the obvious dark-stained structure within the nucleus that contains ribosomal RNA called?

Accepted Answer

A)   nucleus
B)   nucleolus
C)   nuclear envelope
D)   nucleoplasm
E)   endoplasmic reticulumF) A) and B)
G) A) and E)

Question 18

Which of the following protein fibers is used for cellular movement and are extremely thin in size?

Accepted Answer

A)   actin filaments
B)   intermediate filaments
C)   microtubules
D)   centrosome
E)   ciliaF) A) and D)
G) A) and E)

Question 19

Paleontologists have discovered ancient prokaryotic fossils dated at over 3.5 billion years old.These fossils resemble prokaryotes that are capable of living in extreme conditions such as high temperature and salinity.What domain do these prokaryotes belong to?

Accepted Answer

A)   Protists
B)   Protoctista
C)   Archaea
D)   Archetista
E)   EukaryaF) A) and D)
G) D) and E)

Question 20

The cytoplasm is not considered a cellular organelle.

Accepted Answer

A) True 
 B)False

Exam 3: Cell Structure and Function

The phospholipid bilayer that surrounds/maintains the integrity of a cell is called a

Correct AnswerverifiedShow Answer

The reason that metabolizing cells are small in size is because

Correct AnswerverifiedShow Answer

The cytoplasm is not considered a cellular organelle.

Correct AnswerverifiedShow Answer

The plasma membrane contains how many layers of phospholipids?

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Which of the following protein fibers is used for cellular movement and are extremely thin in size?

Correct AnswerverifiedShow Answer

Which of the following can cross the plasma membrane because of its selective permeability?

Correct AnswerverifiedShow Answer

What is the function of cholesterol in the plasma membrane?

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Explain the functions of adhesion junctions,gap junctions,and tight junctions in human cells.

Correct AnswerverifiedAdhesion junctions serve to mechanically...View AnswerShow Answer

What is the main function of the ribosomes in the cell?

Correct AnswerverifiedShow Answer

What cellular organelle is especially abundant in phagocytic white blood cells?

Correct AnswerverifiedShow Answer

The first day of football practice was rough on the squad.During practice,the players complained of cramps and sore muscles.Although there is evidence to suggest that many different factors may contribute to this,which of the following is most likely to play a role in the soreness?

Correct AnswerverifiedShow Answer

The size of a metabolizing cell is limited by its

Correct AnswerverifiedShow Answer

In the sodium-potassium pump,sodium and potassium are both pumped out of the cell via active transport.

Correct AnswerverifiedShow Answer

What is the obvious dark-stained structure within the nucleus that contains ribosomal RNA called?

Correct AnswerverifiedShow Answer

Paleontologists have discovered ancient prokaryotic fossils dated at over 3.5 billion years old.These fossils resemble prokaryotes that are capable of living in extreme conditions such as high temperature and salinity.What domain do these prokaryotes belong to?

Correct AnswerverifiedShow Answer

The sum of all of the chemical reactions that occur in a cell collectively are called

Correct AnswerverifiedShow Answer

Fermentation produces more ATP than does aerobic respiration.

Correct AnswerverifiedShow Answer

Choose the CORRECT statement about solute concentrations or particles inside and outside the cell.

Correct AnswerverifiedShow Answer

In an experiment in the laboratory,a small colored molecule is injected into one cell.Within minutes,the molecule has entered the adjacent cells.What type of junctions connect these cells?

Correct AnswerverifiedShow Answer

A solution is at equilibrium across a plasma membrane.If 50 molecules were to enter the cell,how many molecules would need to exit the cell in order to maintain the equilibrium?

Correct AnswerverifiedShow Answer

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Adhesion junctions serve to mechanically...
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