Question 1

Cell membranes are said to be selectively permeable because they

Accepted Answer

A) allow the free passage of some materials and restrict the passage of 
B) others. 
C) allow the passage of materials in one direction but not the other. 
D) permit the passage of most materials but not of water. 
E) Cell membranes are NOT normally selectively permeable. 
A) allow the free passage of some materials and restrict the passage of 
B) others. 
C) allow the passage of materials in one direction but not the other. 
D) permit the passage of most materials but not of water. 
E) Cell membranes are NOT normally selectively permeable. A

Question 2

Phospholipid molecules

Accepted Answer

A) have a phosphate-containing end that is nonpolar. 
B) have a fatty acid end that is polar. 
C) are arranged in a double layer in the cell membrane. 
D) are not found in the cell membrane. 
E) have all of these characteristics. 
A) have a phosphate-containing end that is nonpolar. 
B) have a fatty acid end that is polar. 
C) are arranged in a double layer in the cell membrane. 
D) are not found in the cell membrane. 
E) have all of these characteristics. C

Question 3

This diagram best shows a cell during _________ of mitosis.

Accepted Answer

A) anaphase 
B) metaphase 
C) prophase 
D) telophase 
A) anaphase 
B) metaphase 
C) prophase 
D) telophase B

Question 4

Which of the following would occur if all cell membranes were no longer selectively permeable?

Accepted Answer

A) Action potentials would no longer be generated. 
B) Cells would be isotonic to their environment. 
C) You would be subject to a higher rate of illness and disease. 
D) Cells would not be able to get and keep enough glucose to function. 
E) All of these choices are plausible. 
A) Action potentials would no longer be generated. 
B) Cells would be isotonic to their environment. 
C) You would be subject to a higher rate of illness and disease. 
D) Cells would not be able to get and keep enough glucose to function. 
E) All of these choices are plausible.

Question 5

A gene is a sequence of _____ providing a chemical set of instructions for making a ________.

Accepted Answer

A) nucleotides; lipid 
B) nucleotides; protein 
C) amino acids; protein 
D) carbohydrates; polysaccharide 
E) fatty acids; lipid 
A) nucleotides; lipid 
B) nucleotides; protein 
C) amino acids; protein 
D) carbohydrates; polysaccharide 
E) fatty acids; lipid

Question 6

Osmosis

Accepted Answer

A) involves the diffusion of solute particles. 
B) can cause a cell to shrink when placed in a hypotonic solution. 
C) occurs through a selectively permeable membrane. 
D) can cause a cell to rupture when placed in a hypertonic solution. 
E) can cause a cell to shrink when placed in a hypotonic solution and can cause a cell to rupture when placed in a hypertonic solution. 
A) involves the diffusion of solute particles. 
B) can cause a cell to shrink when placed in a hypotonic solution. 
C) occurs through a selectively permeable membrane. 
D) can cause a cell to rupture when placed in a hypertonic solution. 
E) can cause a cell to shrink when placed in a hypotonic solution and can cause a cell to rupture when placed in a hypertonic solution.

Question 7

A cell examined under the microscope shows large amounts of rough endoplasmic reticulum,many Golgi apparatuses,and many secretory vesicles.To which of the following tissues would this cell most likely belong?

Accepted Answer

A) bone 
B) muscle 
C) mammary gland 
D) blood 
E) fat 
A) bone 
B) muscle 
C) mammary gland 
D) blood 
E) fat

Question 8

Substances outside the cell membrane are called

Accepted Answer

A) intracellular substances. 
B) extracellular substances. 
C) intercellular substances. 
D) Both extracellular material and intercellular material are correct names. 
E) All of these are correct names. 
A) intracellular substances. 
B) extracellular substances. 
C) intercellular substances. 
D) Both extracellular material and intercellular material are correct names. 
E) All of these are correct names.

Question 9

Secretory vesicles pinch off from

Accepted Answer

A) the Golgi apparatus. 
B) ribosomes. 
C) lysosomes. 
D) smooth endoplasmic reticulum 
E) the nucleus. 
A) the Golgi apparatus. 
B) ribosomes. 
C) lysosomes. 
D) smooth endoplasmic reticulum 
E) the nucleus.

Question 10

The type of membrane transport that involves the ingestion of solid particles by vesicle formation is

Accepted Answer

A) simple diffusion. 
B) exocytosis. 
C) facilitated diffusion. 
D) active transport. 
E) endocytosis. 
A) simple diffusion. 
B) exocytosis. 
C) facilitated diffusion. 
D) active transport. 
E) endocytosis.

Question 11

__________,located within the cytoplasm of the cell,facilitate the movement of chromosomes during cell division.

Accepted Answer

A) secretory vessicles 
B) centrioles 
C) cilia 
D) microvilli 
E) flagella 
A) secretory vessicles 
B) centrioles 
C) cilia 
D) microvilli 
E) flagella

Question 12

Moveable projections from the surface of cells found in abundance in the respiratory tract are

Accepted Answer

A) flagella. 
B) cilia. 
C) centrioles. 
D) microvilli. 
E) nucleoli. 
A) flagella. 
B) cilia. 
C) centrioles. 
D) microvilli. 
E) nucleoli.

Question 13

The force required to prevent the movement of water across a selectively permeable membrane is the

Accepted Answer

A) hydrostatic pressure. 
B) diffusion pressure. 
C) osmotic pressure. 
D) membrane pressure. 
E) selective pressure. 
A) hydrostatic pressure. 
B) diffusion pressure. 
C) osmotic pressure. 
D) membrane pressure. 
E) selective pressure.

Question 14

Which of the following statements concerning solutes and solvents is true?

Accepted Answer

A) The solvent is the predominant liquid or gas in a solution. 
B) At equilibrium,all solute particles cease movement. 
C) When oxygen is present in the blood,blood is the solute and oxygen is the solvent. 
D) All solute particles move into or out of the cell by diffusion. 
E) All of these are correct. 
A) The solvent is the predominant liquid or gas in a solution. 
B) At equilibrium,all solute particles cease movement. 
C) When oxygen is present in the blood,blood is the solute and oxygen is the solvent. 
D) All solute particles move into or out of the cell by diffusion. 
E) All of these are correct.

Question 15

If all of the peroxisomes in a cell were suddenly removed,how would this affect its immediate activity and function?

Accepted Answer

A) The cell would no longer be able to break down glucose. 
B) The cell would be unable to produce proteins. 
C) The cell would be unable to perform transcription. 
D) The cell would no longer be able to break down fatty acids,hydrogen peroxide,and amino acids. 
E) The cell would no longer be able to break down proteins and nucleic acids. 
A) The cell would no longer be able to break down glucose. 
B) The cell would be unable to produce proteins. 
C) The cell would be unable to perform transcription. 
D) The cell would no longer be able to break down fatty acids,hydrogen peroxide,and amino acids. 
E) The cell would no longer be able to break down proteins and nucleic acids.

Question 16

Secondary active transport

Accepted Answer

A) involves the use of endocytosis. 
B) involves the active transport of one substance to establish a concentration gradient thereby providing energy for the movement of a second substance. 
C) involves the use of exocytosis. 
D) involves the passive transport of one substance to establish a concentration gradient thereby providing energy for the movement of a second substance. 
E) involves the facilitated transport of one substance which then 'pulls' along a second substance. 
A) involves the use of endocytosis. 
B) involves the active transport of one substance to establish a concentration gradient thereby providing energy for the movement of a second substance. 
C) involves the use of exocytosis. 
D) involves the passive transport of one substance to establish a concentration gradient thereby providing energy for the movement of a second substance. 
E) involves the facilitated transport of one substance which then 'pulls' along a second substance.

Question 17

Endocytosis

Accepted Answer

A) involves the formation of a vesicle by invagination of the cell membrane. 
B) involves the movement of materials to the outside of the cell. 
C) is the opposite of phagocytosis. 
D) is a kind of active transport. 
E) involves the movement of materials to the outside of the cell and is the opposite of phagocytosis. 
A) involves the formation of a vesicle by invagination of the cell membrane. 
B) involves the movement of materials to the outside of the cell. 
C) is the opposite of phagocytosis. 
D) is a kind of active transport. 
E) involves the movement of materials to the outside of the cell and is the opposite of phagocytosis.

Question 18

Transcription

Accepted Answer

A) takes place in the nucleus of the cell. 
B) occurs when double strands of DNA separate,and RNA nucleotides pair with DNA nucleotides. 
C) produces mRNA. 
D) determines the sequence of codons on a particular mRNA molecule. 
E) All of these are true of transcription. 
A) takes place in the nucleus of the cell. 
B) occurs when double strands of DNA separate,and RNA nucleotides pair with DNA nucleotides. 
C) produces mRNA. 
D) determines the sequence of codons on a particular mRNA molecule. 
E) All of these are true of transcription.

Question 19

Carrier mediated transport mechanisms

Accepted Answer

A) exhibit specificity. 
B) function to move large water soluble molecules. 
C) function to move electrically charged ions. 
D) include facilitated diffusion,active transport,and secondary active transport. 
E) All of these are correct. 
A) exhibit specificity. 
B) function to move large water soluble molecules. 
C) function to move electrically charged ions. 
D) include facilitated diffusion,active transport,and secondary active transport. 
E) All of these are correct.

Question 20

The nucleotide that combines with pre-existing protein to form ribosomal subunits is

Accepted Answer

A) tRNA. 
B) mRNA. 
C) rRNA. 
D) All of these are true. 
A) tRNA. 
B) mRNA. 
C) rRNA. 
D) All of these are true.

Cell membranes are said to be selectively permeable because they

Phospholipid molecules

This diagram best shows a cell during _________ of mitosis.

Which of the following would occur if all cell membranes were no longer selectively permeable?

A gene is a sequence of _ providing a chemical set of instructions for making a ____.

Osmosis

A cell examined under the microscope shows large amounts of rough endoplasmic reticulum,many Golgi apparatuses,and many secretory vesicles.To which of the following tissues would this cell most likely belong?

Substances outside the cell membrane are called

Secretory vesicles pinch off from

The type of membrane transport that involves the ingestion of solid particles by vesicle formation is

__________,located within the cytoplasm of the cell,facilitate the movement of chromosomes during cell division.

Moveable projections from the surface of cells found in abundance in the respiratory tract are

The force required to prevent the movement of water across a selectively permeable membrane is the

Which of the following statements concerning solutes and solvents is true?

If all of the peroxisomes in a cell were suddenly removed,how would this affect its immediate activity and function?

Secondary active transport

Endocytosis

Transcription

Carrier mediated transport mechanisms

The nucleotide that combines with pre-existing protein to form ribosomal subunits is

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, heredity, and Aging

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Exam 3: Cell Structures and Their Functions

Cell membranes are said to be selectively permeable because they

Phospholipid molecules

This diagram best shows a cell during _________ of mitosis.

Which of the following would occur if all cell membranes were no longer selectively permeable?

A gene is a sequence of _____ providing a chemical set of instructions for making a ________.

Osmosis

A cell examined under the microscope shows large amounts of rough endoplasmic reticulum,many Golgi apparatuses,and many secretory vesicles.To which of the following tissues would this cell most likely belong?

Substances outside the cell membrane are called

Secretory vesicles pinch off from

The type of membrane transport that involves the ingestion of solid particles by vesicle formation is

__________,located within the cytoplasm of the cell,facilitate the movement of chromosomes during cell division.

Moveable projections from the surface of cells found in abundance in the respiratory tract are

The force required to prevent the movement of water across a selectively permeable membrane is the

Which of the following statements concerning solutes and solvents is true?

If all of the peroxisomes in a cell were suddenly removed,how would this affect its immediate activity and function?

Secondary active transport

Endocytosis

Transcription

Carrier mediated transport mechanisms

The nucleotide that combines with pre-existing protein to form ribosomal subunits is

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, heredity, and Aging

Filters

A gene is a sequence of _ providing a chemical set of instructions for making a ____.