Question 1

Which of the following statements MOST accurately describes a selectively permeable membrane?

Accepted Answer

A)   Solutes are never able to cross the membrane.
B)   Large molecules are always excluded from crossing the membrane.
C)   Substances can only pass through the membrane with the help of either active or passive transport proteins.
D)   Certain solutes move freely across the membrane by simple diffusion, while others must be helped across by active or passive transport proteins; some substances are completely excluded from crossing the membrane.E) B) and C)
F) All of the above

Question 2

Examine the photo below.This photo shows low-density lipoprotein (LDL)particles bound to receptors on the outside of a cell membrane.You view the same cell later and notice that the LDL particles are now enclosed in vesicles inside of the cell.What would you propose as the explanation for how the LDL particles arrived in their new location? Support your explanation.

Accepted Answer

The most likely way the LDL particles en...

Question 3

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal

Accepted Answer

A)   ribosomes.
B)   membranes.
C)   membrane-enclosed organelles.
D)   cell walls.E) A) and C)
F) B) and C)

Question 4

Dialysis tubing is a selectively permeable membrane that can be filled with a solution to simulate a cell.A piece of dialysis tubing has been filled with a cloudy white solution of 5 percent starch,5 percent egg albumin (protein) ,and 5 percent glucose (a small sugar) dissolved in water to simulate a cell.This simulated cell is weighed and then placed in a beaker of water.After soaking in the water for one hour,the simulated cell is once again weighed. Over time,the weight of the simulated cell can be expected to

Accepted Answer

A)   decrease because it is hypotonic to the beaker environment and water will enter the simulated cell through osmosis.
B)   decrease because it is hypertonic to the beaker environment and water will leave the simulated cell through osmosis.
C)   increase because the solution in the beaker is hypotonic to the simulated cell and water will enter the simulated cell through osmosis.
D)   remain constant because it is isotonic to the beaker environment and water will be drawn into the simulated cell because of the albumin.E) None of the above
F) B) and C)

Question 5

A cell that has numerous ________ is a plant cell that plays an important role in photosynthesizing sugars for the entire plant.

Accepted Answer

chloroplasts

Question 6

Match the following cellular structures with their primary function (you may need to use a function more than once) .
-cell wall

Accepted Answer

A)  photosynthesis
B)  regulate what moves in and out of cell
C)  structure and support for cell
D)  lipid synthesis
E)  tags proteins for movementF) enzymatic breakdown of large moleculesG) protein synthesisH) cellular respirationI) water and solute storageJ) location of DNAK) internal organization and structural supportL) A) and E)
M) D) and H)

Question 7

Liposomes form spontaneously from ________ and are important because ________.

Accepted Answer

A)   DNA; they provide a rigid structure to support the cell
B)   phospholipid monolayers; these phospholipid monolayers provide a stable barrier between the internal and external environments
C)   rigid cell walls; they provide support for the living cell and a barrier between the external and internal environments
D)   phospholipid bilayers; they provide a barrier between an external environment and an internal environmentE) A) and D)
F) A) and C)

Question 8

A long piece of ribbon wired along both long edges is twisted into a helix and wrapped around individual pipe cleaners that have been rolled into spools; this grouping is then twisted (super coiled) again to condense it.This could be best used as a simple model for a

Accepted Answer

A)   plasma membrane, where the pipe cleaners represent the phospholipid bilayer and the ribbon represents proteins embedded in the membrane.
B)   cell wall.
C)   mitochondrion.
D)   chromosome, where the pipe cleaners represent bundles of proteins around which the DNA double helix (wired ribbon)  is wrapped.E) All of the above
F) B) and C)

Question 9

________ transport of molecules across a selectively permeable membrane requires the input of energy from the cell,whereas ________ transport of molecules across a selectively permeable membrane does not require the use of cellular energy.

Accepted Answer

Active; passive

Question 10

Label the plasma membrane below.Use the following terms: cellular environment, external environment, plasma membrane, hydrophilic heads, hydrophobic tails ,energy, water, sugar, and transport protiens.

Accepted Answer

(1)external environment
(2)cel...

Question 11

Which of the following statements is true of chloroplasts?

Accepted Answer

A)   They produce proteins used by other parts of the cell.
B)   They capture energy from sunlight.
C)   They give an animal cell its shape.
D)   They contain an entire copy of a cell's genetic material.E) A) and D)
F) A) and C)

Question 12

Neurotransmitters are chemicals that transmit a nerve impulse across the gap between nerve endings.These chemicals are often large and unable to pass through the membrane,so the cell packages them in a vesicle that can fuse with the plasma membrane.The inside of the vesicle opens to the outside of the cell,releasing the neurotransmitters into the gap.This type of transport of cellular products is called

Accepted Answer

A)   pinocytosis.
B)   receptor-mediated endocytosis.
C)   exocytosis.
D)   phagocytosis.E) A) and C)
F) C) and D)

Question 13

What additional structures would the cell below need to become a plant cell?

Accepted Answer

This cell would need a nuclear membrane ...

Question 14

Match the following cellular structures with their primary function (you may need to use a function more than once) .
-Golgi apparatus

Accepted Answer

A)  photosynthesis
B)  regulate what moves in and out of cell
C)  structure and support for cell
D)  lipid synthesis
E)  tags proteins for movementF) enzymatic breakdown of large moleculesG) protein synthesisH) cellular respirationI) water and solute storageJ) location of DNAK) internal organization and structural supportL) B) and H)
M) B) and G)

Question 15

Match the following cellular structures with their primary function (you may need to use a function more than once) .
-central vacuole

Accepted Answer

A)  photosynthesis
B)  regulate what moves in and out of cell
C)  structure and support for cell
D)  lipid synthesis
E)  tags proteins for movementF) enzymatic breakdown of large moleculesG) protein synthesisH) cellular respirationI) water and solute storageJ) location of DNAK) internal organization and structural supportL) D) and G)
M) D) and E)

Question 16

Which of the following types of organisms are single-celled (unicellular) ?

Accepted Answer

A)   bacteria, yeast, and many protozoans
B)   many fungi, some protozoans, and plants
C)   plants and animals
D)   many fungi, plants, and animalsE) A) and B)
F) B) and C)

Question 17

When a white blood cell engulfs an entire bacterial cell by surrounding it with plasma membrane and bringing it into the cell in a vesicle,the white blood cell is accomplishing ________.

Accepted Answer

The answer of When a white blood cell engulfs an...

Question 18

A scientist is observing a membrane through which water and some small hydrophobic molecules can freely pass along a concentration gradient from high to low.However,some sugar molecules are too large to pass through the membrane either way without the assistance of passive transport proteins.Additionally,small Na⁺ ions and some proteins can pass through the membrane against the concentration gradient,but both require the assistance of active transport proteins.What general type of membrane are they observing?

Accepted Answer

A)   impermeable
B)   impenetrable
C)   semipermeable
D)   completely permeableE) A) and B)
F) None of the above

Question 19

If the concentration of sugar molecules in water on side "A" of a selectively permeable membrane is 5 percent,and the concentration of sugar molecules in water on side "B" of a selectively permeable membrane is 15 percent,the water will

Accepted Answer

A)   mostly move from side "B" to side "A" because the water concentration is higher on side"B."
B)   mostly move from side "A" to side "B" because the water concentration is higher on side"A."
C)   mostly move from side "A" to side "B" because the water concentration is higher on side"B."
D)   not move at all because the water concentrations are isotonic.E) All of the above
F) A) and B) B

Question 20

A cell surrounded by only a plasma membrane but containing a nucleus,mitochondria,Golgi apparatus,both smooth and rough ER,ribosomes,cytoskeleton,and lysosomes would be an example of a typical ________ cell.

Accepted Answer

The answer of A cell surrounded by only a plasma...

Exam 4: Life Is Cellular

Which of the following statements MOST accurately describes a selectively permeable membrane?

Correct Answer
verified

Correct Answer
verified
The most likely way the LDL particles en...
View Answer

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal

Correct Answer
verified

Correct Answer
verified

A cell that has numerous ________ is a plant cell that plays an important role in photosynthesizing sugars for the entire plant.

Correct Answer
verified
chloroplasts

Match the following cellular structures with their primary function (you may need to use a function more than once) . -cell wall

Correct Answer
verified

Liposomes form spontaneously from and are important because .

Correct Answer
verified

A long piece of ribbon wired along both long edges is twisted into a helix and wrapped around individual pipe cleaners that have been rolled into spools; this grouping is then twisted (super coiled) again to condense it.This could be best used as a simple model for a

Correct Answer
verified

transport of molecules across a selectively permeable membrane requires the input of energy from the cell,whereas transport of molecules across a selectively permeable membrane does not require the use of cellular energy.

Correct Answer
verified
Active; passive

Label the plasma membrane below.Use the following terms: cellular environment, external environment, plasma membrane, hydrophilic heads, hydrophobic tails ,energy, water, sugar, and transport protiens.

Correct Answer
verified
(1)external environment
(2)cel...
View Answer

Which of the following statements is true of chloroplasts?

Correct Answer
verified

Correct Answer
verified

What additional structures would the cell below need to become a plant cell?

Correct Answer
verified
This cell would need a nuclear membrane ...
View Answer

Match the following cellular structures with their primary function (you may need to use a function more than once) . -Golgi apparatus

Correct Answer
verified

Match the following cellular structures with their primary function (you may need to use a function more than once) . -central vacuole

Correct Answer
verified

Which of the following types of organisms are single-celled (unicellular) ?

Correct Answer
verified

When a white blood cell engulfs an entire bacterial cell by surrounding it with plasma membrane and bringing it into the cell in a vesicle,the white blood cell is accomplishing ________.

Correct Answer
verified

Correct Answer
verified

If the concentration of sugar molecules in water on side "A" of a selectively permeable membrane is 5 percent,and the concentration of sugar molecules in water on side "B" of a selectively permeable membrane is 15 percent,the water will

Correct Answer
verified
B

A cell surrounded by only a plasma membrane but containing a nucleus,mitochondria,Golgi apparatus,both smooth and rough ER,ribosomes,cytoskeleton,and lysosomes would be an example of a typical ________ cell.

Correct Answer
verified

Exam 4: Life Is Cellular

Which of the following statements MOST accurately describes a selectively permeable membrane?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe most likely way the LDL particles en...View AnswerShow Answer

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A cell that has numerous ________ is a plant cell that plays an important role in photosynthesizing sugars for the entire plant.

Correct Answerverifiedchloroplasts

Match the following cellular structures with their primary function (you may need to use a function more than once) . -cell wall

Correct AnswerverifiedShow Answer

Liposomes form spontaneously from ________ and are important because ________.

Correct AnswerverifiedShow Answer

A long piece of ribbon wired along both long edges is twisted into a helix and wrapped around individual pipe cleaners that have been rolled into spools; this grouping is then twisted (super coiled) again to condense it.This could be best used as a simple model for a

Correct AnswerverifiedShow Answer

________ transport of molecules across a selectively permeable membrane requires the input of energy from the cell,whereas ________ transport of molecules across a selectively permeable membrane does not require the use of cellular energy.

Correct AnswerverifiedActive; passive

Label the plasma membrane below.Use the following terms: cellular environment, external environment, plasma membrane, hydrophilic heads, hydrophobic tails ,energy, water, sugar, and transport protiens.

Correct Answerverified(1)external environment(2)cel...View AnswerShow Answer

Which of the following statements is true of chloroplasts?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What additional structures would the cell below need to become a plant cell?

Correct AnswerverifiedThis cell would need a nuclear membrane ...View AnswerShow Answer

Match the following cellular structures with their primary function (you may need to use a function more than once) . -Golgi apparatus

Correct AnswerverifiedShow Answer

Match the following cellular structures with their primary function (you may need to use a function more than once) . -central vacuole

Correct AnswerverifiedShow Answer

Which of the following types of organisms are single-celled (unicellular) ?

Correct AnswerverifiedShow Answer

When a white blood cell engulfs an entire bacterial cell by surrounding it with plasma membrane and bringing it into the cell in a vesicle,the white blood cell is accomplishing ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If the concentration of sugar molecules in water on side "A" of a selectively permeable membrane is 5 percent,and the concentration of sugar molecules in water on side "B" of a selectively permeable membrane is 15 percent,the water will

Correct AnswerverifiedB

A cell surrounded by only a plasma membrane but containing a nucleus,mitochondria,Golgi apparatus,both smooth and rough ER,ribosomes,cytoskeleton,and lysosomes would be an example of a typical ________ cell.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
The most likely way the LDL particles en...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
chloroplasts

Correct Answer
verified

Liposomes form spontaneously from and are important because .

Correct Answer
verified

Correct Answer
verified

transport of molecules across a selectively permeable membrane requires the input of energy from the cell,whereas transport of molecules across a selectively permeable membrane does not require the use of cellular energy.

Correct Answer
verified
Active; passive

Correct Answer
verified
(1)external environment
(2)cel...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
This cell would need a nuclear membrane ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified