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Cell Biology - Test 5 :: Diffusion

Total questions: 73

Worksheet time: 2hrs 32mins

Name
Class
Date
1.

Diffusion & Facilitated Diffusion are both __________ transport.

a)

Passive

b)

Active

c)

Easy

d)

Free

2.

Passive Transport is the movement of particles across the membrane from an area of [ ___ ] to an area of [ ___ ]

a)

high to low

b)

low to high

c)

low to low

d)

high to high

3.

Passive Transport uses ____ energy

a)

no

b)

a lot of

c)

a little bit of

d)

some

4.

_____________ is the free movement of particles across the membrane with the concentration gradient

a)

diffusion

b)

facilitated diffusion

c)

active transport

d)

fusion

5.

Passive Transport is the movement of particles _________ the concentration gradient.

a)

with

b)

against

c)

opposing

d)

throughout

6.

An example of diffusion is

a)

CO2 and O2 exchange in the lungs

b)

Glucose transport

c)

Na+ / K+ Pumps

d)

Exocytosis

7.

What is the movement of particles with the concentration gradient using protein "helpers"?

a)

diffusion

b)

facilitated diffusion

c)

active transport

d)

enzymatic reactions

8.

What is a difference between diffusion and facilitated diffusion?

a)

movement of particles from [high] to [low]

b)

a carrier protein

c)

movement of particles from [low] to [high]

d)

energy

9.

The general name for movement of substances across cell membranes without need of energy input

a)

passive transport

b)

active transport

10.

The condition in which all acting influences are balanced.

a)

equilibrium

b)

dynamic equilibrium

c)

net movement

11.

Small changes of particles moving across the membrane that sum together to produce no net change.

a)

equilibrium

b)

dynamic equilibrium

c)

net movement

12.

The number of molecules moving one direction minus the number of molecules moving in the other direction.

a)

equilibrium

b)

dynamic equilibrium

c)

net movement

13.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
14.
What is the definition of  Selective Permeability?
a)
The movement of materials across the cell membrane that requires NO ENERGY from the cell.
b)
The movement of materials through (or across) the cell membrane
c)
The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
d)
The movement of molecules from an area of high concentration to a area of low concentration 
15.

Diffusion occurs only in solids

a)

True

b)

False

16.

The movement of particles is __________, resulting in the particles being spread throughout the container

a)

Structured

b)

In a straight line

c)

Random

d)

In curved, way motions

17.

When does diffusion stop?

a)

After a day and a night

b)

When the particles are evenly spread out

c)

When there are no particles left

d)

When all the particles leave the system

18.

What is DIFFUSION?

a)
b)
c)
d)
19.
An increase in temperature does what to diffusion?
a)
Speeds it up
b)
Slows it down
c)
Has no effect
d)
I wish i knew. Really I do.
20.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
21.
What happens to particles when they are heated?
a)
They speed up and spread out
b)
They slow down and compress
c)
They stop moving
d)
They move closer together and speed up
22.

Which of the following is a function (job) of the cell membrane>

a)

breaks down lipids, carbohydrates, and proteins from food

b)

stores water, salt, proteins, and carbs

c)

keeps the cell wall in place

d)

regulates the movement of materials into and out of the cell

23.
What is the diffusion of water only across a cell or semi-permeable membrane?
a)
Osmosis
b)
Diffusion
c)
Active Transport
d)
Passive Transport
24.
In which case would a cell most likely shrink?
a)
when placed in a solution containing a high salt concentration
b)
when placed in a isotonic solution
c)
when placed in a solution containing a low pH
d)
when placed in a solution containing distilled water
25.
A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?
a)
Water moved into the lettuce cells by active transport.
b)
Water moved into the lettuce cells by osmosis.
c)
Salt moved into the lettuce cells by diffusion.
d)
Water moved out of the lettuce cells by osmosis.
26.
Diffusion and Osmosis are examples of...
a)
Active Transport
b)
Passive Transport
27.
 If the volume of a cell increases when it is placed in a solution, that solution is said to be __________ to the cell
a)
 hypertonic
b)
subatomic
c)
 isotonic
d)
 hypotonic 
28.
Diffusion is the _______________ movement of particles freely in all directions to occupy the whole space available
a)
constant orderly
b)
constant random
c)
continuous
d)
fixed
29.
Which gas will diffuse at the slowest speed?
a)
oxygen
b)
carbon dioxide
c)
bromine
d)
hydrogen
30.
In the given scenario what will happen?  An egg is placed in pure water for 48 hours.
a)
The egg will gain water and swell.
b)
Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
c)
The egg will lose water and shrink.
31.
Ideally, your cells should be in a(n) _______ solution
a)
Hypertonic
b)
Hypotonic
c)
Isotonic
d)
Cola
32.
Osmosis
a)
diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration
b)
the diffusion of particles from an area of high concentration to an area of low concentration
c)
diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration
d)
the diffusion of particles from an area of low concentration to an area of high concentration
33.
The cell below is in a _________ solution.
a)
Hypotonic
b)
Hypertonic
c)
Isotonic
34.
Which cell is placed into a hypotonic environment? 
a)
A
b)
B
c)
C
d)
D
35.
 An animal cell placed in a hypertonic (salty) solution will
a)
Stay the same
b)
Shrink- get smaller
c)
Swell- get bigger
36.
Which diagram best shows the end result of diffusion?
a)
F
b)
G
c)
H
d)
J
37.

During diffusion, movement of substances depends on ___________

a)

Concentration Gradient

b)

Pressure Gradient

c)

Electrical Gradient

d)

All of the above

e)

None of the above

38.

Diffusion depends on __________ movement of _________ and is a/an _________ process

a)

Directional, Solvent, Exergonic

b)

Random, Solute, Exergonic

c)

Directional, Solvent, Endergonic

d)

Random, Solute, Endergonic

39.

The equation, ΔG = RT ln⁡ [CiCo]\Delta G\ =\ RT\ \ln\ \left[\frac{Ci}{Co}\right] , explains the ________

a)

Free Energy change of a non-electrolyte

b)

Free Energy change of a charged solute

c)

Free Energy change of an electrolyte

d)

None of the above

40.

In the equation, ΔG = RT ln⁡ [CiCo]\Delta G\ =\ RT\ \ln\ \left[\frac{Ci}{Co}\right] , ΔG\Delta G refers to the _________

a)

Free Energy difference

b)

Gas Constant

c)

Absolute Temperature

d)

Ratio of concentration of solute inside and outside

41.

In the equation, ΔG = RT ln⁡ [CiCo]\Delta G\ =\ RT\ \ln\ \left[\frac{Ci}{Co}\right] , R refers to the _________

a)

Free Energy difference

b)

Gas Constant

c)

Absolute Temperature

d)

Ratio of concentration of solute inside and outside

42.

In the equation, ΔG = RT ln⁡ [CiCo]\Delta G\ =\ RT\ \ln\ \left[\frac{Ci}{Co}\right] , [CiCo]\left[\frac{Ci}{Co}\right] refers to the _________

a)

Ratio of concentration of solution inside and outside

b)

Ratio of concentration of solvent inside and outside

c)

Ratio of concentration of solute inside and outside

d)

None of the above

43.

In the equation, ΔG = RT ln⁡ [CiCo]\Delta G\ =\ RT\ \ln\ \left[\frac{Ci}{Co}\right] , if the ratio of [CiCo]\left[\frac{Ci}{Co}\right] is less than 1.0, then the log of the ratio is _______, ΔG\Delta G is _______ and the net influx of solute is thermodynamically favoured resulting in ________ process

a)

Negative, Positive, Exergonic

b)

Negative, Negative, Exergonic

c)

Positive, Negative, Endergonic

d)

Negative, Negative, Endergonic

44.

Ability of an electrolyte to diffuse between 2 compartments, depends on _______

a)

Chemical Gradient

b)

Electrical Gradient

c)

Chemical and Electrical Gradient

d)

Chemical, Electrical and Pressure Gradient

45.

Factors that affect Net Rate of Diffusion are ________ (Tick all that are correct)

a)

Permeability

b)

Concentration Gradient

c)

Pressure Gradient

d)

Electrochemical Gradient

e)

Energy

46.

The net rate of diffusion of the substance through each unit area of the mebrane for a unit concentration or Pressure or Electrical Difference is called as (a)  

47-49.

Factors Affecting Net Rate of Diffusion

Surface area plays a crucial role in determining the net rate of diffusion. A larger surface area allows for more molecules to come into contact with the membrane, leading to increased diffusion rates.

Temperature is another significant factor influencing the net rate of diffusion. Higher temperatures generally result in faster molecular movement, leading to increased diffusion rates. Conversely, lower temperatures can slow down the rate of diffusion due to reduced molecular motion.

Molecular size also impacts the net rate of diffusion. Smaller molecules tend to diffuse more rapidly than larger ones due to their ability to move through the membrane more easily. Larger molecules may experience more resistance and therefore diffuse at a slower rate.

47.

How do higher temperatures generally affect molecular movement?

a)

Decrease molecular movement

b)

Have no effect on molecular movement

c)

Lead to increased diffusion rates

d)

Cause molecular movement to stop

48.

How does surface area impact the net rate of diffusion?

a)

It has no effect on diffusion

b)

It decreases the rate of diffusion

c)

It increases the rate of diffusion

d)

It only affects the concentration gradient

49.

Why do smaller molecules tend to diffuse more rapidly than larger ones?

a)

Smaller molecules have a higher surface area to volume ratio

b)

Smaller molecules have less mass to hinder their movement

c)

Smaller molecules experience less resistance from the medium

d)

Smaller molecules have stronger intermolecular forces

50.

Thickness of the cell membrane is directly proportional to the rate of diffusion. True (T) or False (F)

(a)  

51.

Lipid solubility is directly proportional to the rate of diffusion. True (T) or False (F)

(a)  

52.

Number of protein channels in the plasma membrane is indirectly proportional to the rate of diffusion. True (T) or False (F)

(a)  

53.

Temperature is directly proportional to the rate of diffusion. True (T) or False (F)

(a)  

54.

Molecular weight of the substance is indirectly proportional to the rate of diffusion. True (T) or False (F)

(a)  

55.

Area of the plamsa membrane is calculated by the formula ________

a)

P x T

b)

A x T

c)

P x A

d)

P x ΔG\Delta G

56.

Which of the following, penetrate the plasma membrane easily _______

a)

Lipid - soluble substances

b)

Small, charged molecules

c)

Large, uncharged molecules

d)

All of the above

57.

Lipid solubility of a substance is measured by its ________

a)

Polarity

b)

Non-polarity

c)

Ability to mix with water

d)

Hydrophilic nature

58.

Transport of water takes place by _________

a)

Simple diffusion

b)

Facilitated Diffusion

c)

Osmosis

d)

Simple diffusion and Osmosis

59.

Who disocered Ion Channels in the giant nerve cells of squid for the first time?

a)

Nernst & Donnan

b)

Hodgkin, Katz and Huxley

c)

Gibbs, Nernst

d)

Nernst, Hodgkin and Gibbs

60.

Ion channels of the plasma membrane are ______ and ______

a)

Non-specific, Unidirectional

b)

Selective, Unidirectional

c)

Non-specific, Bidirectional

d)

Selective, Bidirectional

61.

Transport of ions is dependent on __________

a)

Concentration gradient

b)

Pressure gradient

c)

Electrochemical Gradient

d)

All of the above

62.

The ion channels, whose conformational change depends upon the difference in ionic charge on both sides of the mebrane are called as (a)   gated channels

63.

The ion channels, whose conformational change depends on the binding of a particular substance are called as (a)   gated channels

64.

Though ions are smaller than any other polar molecules that can diffuse, the reason why ions cannot diffuse through lipids is __________ (Tick all that are appropriate)

a)

Electrical charge makes them hydrated ions

b)

Electrical charge repels them because polar lipids have excess negative charge

c)

Electrical charge makes them insoluble

d)

Electrical charge repels them because polar lipids have excess positive charge

65.

Facilitated diffusion involves a/an ________

a)

Channel

b)

ATPase

c)

Carrier

d)

Signal

66.

The transport proteins of facilitated diffusion are __________

a)

Extracellular proteins

b)

Cytoplasmic proteins

c)

Extrinsic proteins

d)

Integral proteins

67.

Which of the following is not true of facilitated diffusion? (Tick all that are appropriate)

a)

It requires a transporter protein

b)

It depends on gradient

c)

It is stereo-specific

d)

It exhibits saturation kinetics

e)

It allows the passage of polar solvents that are not able to penetrate the lipid bilayer

68.

In facilitated diffusion, saturation means _______

a)

Binding of solute on one side brings about a conformational change in the carrier

b)

It discriminates between Dextro and Levo isomers

c)

The rate of transport of substances is dependent on the number of carrier proteins

d)

It allows the passage of polar solutes

69.

In facilitated diffusion, stereo specifity refers to _______

a)

Binding of solute on one side brings about a conformational change in the carrier

b)

It discriminates between Dextro and Levo isomers

c)

The rate of transport of substances is dependent on the number of carrier proteins

d)

It allows the passage of polar solutes

70.

GLUT refers to (a)  

71.

Cardiac muscle, skeletal muscle and fat cells are specific for _______

a)

GLUT 1

b)

GLUT 2

c)

GLUT 3

d)

GLUT 4

72.

GLUT proteins are example for _______

a)

Simple Diffusion

b)

Facilitated Diffusion

c)

Primary Active Transport

d)

Cotransport

73.

Anion Exchange Permease of RBC is an example for _______

a)

Simple Diffusion

b)

Facilitated Diffusion

c)

Primary Active Transport

d)

Cotransport

74.

Deficiency of GLUT-4 proteins results in _________ (Tick all that are correct)

a)

Juvenile diabtetes

b)

Adult Diabetes

c)

Type I diabetes

d)

Type II diabetes

75.

Which of the following small, uncharged molecules penetrated very rapidly, by dipping between adjacent phospholipids?

a)

Oxygen, CO2, NO

b)

Oxygen, CO2, NO, H2O

c)

Oxygen, CO2, NO, H2O, Ethanol

d)

Na+, K+, Cl-

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