Question 1

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 2

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

Accepted Answer

Adhesion junctions serve to mechanically

Question 3

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)  cilia 
A)  actin filaments 
B)  intermediate filaments 
C)  microtubules 
D)  centrosome 
E)  cilia

Question 4

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

Question 5

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 The 
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 The

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. 
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.

Question 7

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

Question 8

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 reticulum 
A)  nucleus 
B)  nucleolus 
C)  nuclear envelope 
D)  nucleoplasm 
E)  endoplasmic reticulum

Question 9

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

Accepted Answer

A)  nuclei 
B)  nucleoli 
C)  Golgi apparati 
D)  lysosomes 
E)  ribosomes 
A)  nuclei 
B)  nucleoli 
C)  Golgi apparati 
D)  lysosomes 
E)  ribosomes

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. 
A)  plasma membrane. 
B)  Sanger enclosure. 
C)  hydrophobic membrane. 
D)  dialysis membrane. 
E)  mosaic membrane.

Question 11

What is the function of cholesterol in the plasma membrane?

Accepted Answer

A)  cell marker 
B)  receptor 
C)  support 
D)  channel 
E)  enzyme 
A)  cell marker 
B)  receptor 
C)  support 
D)  channel 
E)  enzyme

Question 12

The plasma membrane contains how many layers of phospholipids?

Accepted Answer

A)  one 
B)  two 
C)  four 
D)  eight 
E)  sixteen 
A)  one 
B)  two 
C)  four 
D)  eight 
E)  sixteen

Question 13

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

Question 14

The cytoplasm is not considered a cellular organelle.

Accepted Answer

A) True 
 B)False

Question 15

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)  100 
A)  50 
B)  75 
C)  25 
D)  0 
E)  100

Question 16

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 junctions 
A)  gap junctions 
B)  free junctions 
C)  adhesion junctions 
D)  tight junctions 
E)  actin junctions

Question 17

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)  lactate 
A)  glucose 
B)  alcohol 
C)  carbon dioxide 
D)  carbon monoxide 
E)  lactate

Question 18

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)  Eukarya 
A)  Protists 
B)  Protoctista 
C)  Archaea 
D)  Archetista 
E)  Eukarya

Question 19

Fermentation produces more ATP than does aerobic respiration.

Accepted Answer

A) True 
 B)False

Question 20

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. 
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.

Exam 3: Cell Structure and Function

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

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

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

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

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

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

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

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

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

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

What is the function of cholesterol in the plasma membrane?

The plasma membrane contains how many layers of phospholipids?

The size of a metabolizing cell is limited by its

The cytoplasm is not considered a cellular organelle.

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?

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?

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?

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?

Fermentation produces more ATP than does aerobic respiration.

The reason that metabolizing cells are small in size is because

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