Question 1

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) B) and D)
G) All of the above

Question 2

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) A) and C)

Question 3

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) B) and C)
G) A) and C)

Question 4

What is the function of cholesterol in the plasma membrane?

Accepted Answer

A)   cell marker
B)   receptor
C)   support
D)   channel
E)   enzymeF) C) and D)
G) A) and E)

Question 5

The cytoplasm is not considered a cellular organelle.

Accepted Answer

A) True 
 B)False

Question 6

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) B) and E)
G) A) and B)

Question 7

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 D)
G) B) and D)

Question 8

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) None of the above
G) C) and E)

Question 9

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 C)

Question 10

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) All of the above
G) A) and C)

Question 11

Fermentation produces more ATP than does aerobic respiration.

Accepted Answer

A) True 
 B)False

Question 12

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) A) and E)
G) A) and C)

Question 13

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) B) and D)
G) C) and D)

Question 14

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

Accepted Answer

Adhesion junctions serve to mechanically...

Question 15

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 16

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) A) and E)
G) D) and E)

Question 17

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) D) and E)
G) B) and E)

Question 18

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) A) and C)
G) C) and D)

Question 19

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

Accepted Answer

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

Question 20

The plasma membrane contains how many layers of phospholipids?

Accepted Answer

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

Exam 3: Cell Structure and Function

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

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

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

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

The reason that metabolizing cells are small in size is because

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Fermentation produces more ATP than does aerobic respiration.

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

What is the function of cholesterol in the plasma membrane?

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

The size of a metabolizing cell is limited by its

Correct AnswerverifiedShow Answer

The plasma membrane contains how many layers of phospholipids?

Correct AnswerverifiedShow Answer

The cytoplasm is not considered a cellular organelle.

Correct AnswerverifiedShow Answer

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Adhesion junctions serve to mechanically...
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