Question 1

Which egg is isotonic to the solution?

Accepted Answer

A)  Egg 1
B)  Egg 2
C)  Egg 3D) B) and C)
E) All of the above

Question 2

A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour.Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?

Accepted Answer

A)  Water
B)  NH4+
C)  NH3
D)  CH3COO-E) C) and D)
F) A) and B)

Question 3

Carrier proteins are saturated at which point?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and B)
F) A) and C)

Question 4

A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass.They inject a 5M solution of glucose into the cell and then place the cell into a beaker of water.After an hour, what effect do you expect to observe?

Accepted Answer

A)  Water moves out of the cell
B)  Glucose moves out of the cell
C)  No net change in cell weight
D)  Water moves into the cellE) A) and B)
F) B) and C)

Question 5

How are the tails and heads of membrane phospholipids oriented in their environment?

Accepted Answer

A)  The hydrophobic heads are oriented towards each other and the hydrophillic tails are oriented towards the extracellular fluid and the intracellular fluid.
B)  The hydrophillic tails are oriented towards each other and the hydrophobic heads are oriented towards the extracellular fluid and the intracellular fluid.
C)  The hydrophobic tails are oriented towards each other and the hydrophillic heads are oriented towards the extracellular fluid and the intracellular fluid.
D)  The hydrophillic heads are oriented towards each other and the hydrophobic tails are oriented towards the extracellular fluid and the intracellular fluid.E) A) and B)
F) A) and C)

Question 6

The plasma membrane is a thin sheet of lipid embedded with

Accepted Answer

A)  proteins.
B)  carbohydrates.
C)  polymers.
D)  nucleotides.E) B) and D)
F) C) and D)

Question 7

What is the main component of an animal cell membrane?

Accepted Answer

A)  phospholipids
B)  polynucleotides
C)  aquaporins
D)  glycolipidsE) None of the above
F) B) and C)

Question 8

A novice gardener notices that many plants in his garden look wilted.What osmotic solution would you suggest the novice gardener use to best return the plants to full health?

Accepted Answer

A)  Place the plants in a 15% solute solution so water can be actively transported out of the plant cells.
B)  Place the plants in a 5% solute solution so water can be actively transported out of the plant cells.
C)  Place the plants in a 5% solute solution so water can diffuse into the plant cells.
D)  Place the plants in a 15% solute solution so water can diffuse out of the plant cells.E) A) and D)
F) A) and C)

Question 9

The rate of diffusion will increase as

Accepted Answer

A)  the number of glucose molecules decreases.
B)  the number of glucose molecules increases.
C)  temperature decreases.
D)  pH rises.E) A) and C)
F) A) and B)

Question 10

Membrane fluidity is affected by

Accepted Answer

A)  temperature, cholesterol, types of fatty acids.
B)  size of molecules, polarity of molecules, temperature.
C)  types of fatty acids, waters affinity for hydrogen bonding.
D)  hyrophillic tails, hydrophobic heads, cholesterol.E) None of the above
F) A) and B)

Question 11

Membrane proteins are not very soluble in water, because they possess long stretches of non-polar amino acids that are

Accepted Answer

A)  too long to interact with the water molecules.
B)  hydrophobic.
C)  are transmembranal.
D)  hydrophilic.E) A) and B)
F) All of the above

Question 12

Membrane potential will affect the directional movement of

Accepted Answer

A)  Glucose (C6H12O6) 
B)  Cholesterol
C)  Potassium (K+) 
D)  Oxygen (O2) E) B) and D)
F) None of the above

Exam 5: Membranes

The plasma membrane is a thin sheet of lipid embedded with

Correct Answer
verified

Membrane potential will affect the directional movement of

Correct Answer
verified

Membrane fluidity is affected by

Correct Answer
verified

A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass.They inject a 5M solution of glucose into the cell and then place the cell into a beaker of water.After an hour, what effect do you expect to observe?

Correct Answer
verified

What is the main component of an animal cell membrane?

Correct Answer
verified

A novice gardener notices that many plants in his garden look wilted.What osmotic solution would you suggest the novice gardener use to best return the plants to full health?

Correct Answer
verified

Which egg is isotonic to the solution?

Correct Answer
verified

Membrane proteins are not very soluble in water, because they possess long stretches of non-polar amino acids that are

Correct Answer
verified

How are the tails and heads of membrane phospholipids oriented in their environment?

Correct Answer
verified

A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour.Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?

Correct Answer
verified

The rate of diffusion will increase as

Correct Answer
verified

Carrier proteins are saturated at which point?

Correct Answer
verified

Exam 5: Membranes

The plasma membrane is a thin sheet of lipid embedded with

Correct AnswerverifiedShow Answer

Membrane potential will affect the directional movement of

Correct AnswerverifiedShow Answer

Membrane fluidity is affected by

Correct AnswerverifiedShow Answer

A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass.They inject a 5M solution of glucose into the cell and then place the cell into a beaker of water.After an hour, what effect do you expect to observe?

Correct AnswerverifiedShow Answer

What is the main component of an animal cell membrane?

Correct AnswerverifiedShow Answer

A novice gardener notices that many plants in his garden look wilted.What osmotic solution would you suggest the novice gardener use to best return the plants to full health?

Correct AnswerverifiedShow Answer

Which egg is isotonic to the solution?

Correct AnswerverifiedShow Answer

Membrane proteins are not very soluble in water, because they possess long stretches of non-polar amino acids that are

Correct AnswerverifiedShow Answer

How are the tails and heads of membrane phospholipids oriented in their environment?

Correct AnswerverifiedShow Answer

A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour.Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?

Correct AnswerverifiedShow Answer

The rate of diffusion will increase as

Correct AnswerverifiedShow Answer

Carrier proteins are saturated at which point?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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verified

Correct Answer
verified

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Correct Answer
verified

Correct Answer
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