Cell Membranes and Transport

Taz P
Quiz by Taz P, updated more than 1 year ago
Taz P
Created by Taz P over 3 years ago
12
1

Description

AS Biology

Resource summary

Question 1

Question
Osmosis is the [blank_start]diffusion[blank_end] of [blank_start]water molecules[blank_end] from a region of [blank_start]high water potential[blank_end] to a region of [blank_start]low water potential[blank_end], through a [blank_start]selectively permeable membrane[blank_end].
Answer
  • diffusion
  • water molecules
  • high water potential
  • low water potential
  • selectively permeable membrane

Question 2

Question
Water potential of an animal cell in pure water/dilute solution ([blank_start]hypotonic[blank_end] to the cell) causes [blank_start]haemolysis[blank_end]. Water potential of an animal cell in a concentrated solution ([blank_start]hypertonic[blank_end] to the cell) causes [blank_start]crenation[blank_end]. Water potential of an animal cell in a solution with the same concentration ([blank_start]isotonic[blank_end] to the cell) causes [blank_start]no change[blank_end].
Answer
  • hypotonic
  • hypertonic
  • isotonic
  • haemolysis
  • no change
  • crenation
  • hypertonic
  • hypotonic
  • isotonic
  • crenation
  • haemolysis
  • no change
  • isotonic
  • hypotonic
  • hypertonic
  • no change
  • crenation
  • haemolysis

Question 3

Question
The equation for water potential in a plant cell is: water potential = pressure potential - solute potential
Answer
  • True
  • False

Question 4

Question
[blank_start]Solute potential[blank_end] is the [blank_start]reduction[blank_end] in [blank_start]water potential[blank_end] due to the presence of [blank_start]solute[blank_end] molecules.
Answer
  • Solute potential
  • Water potential
  • reduction
  • addition
  • change
  • increase
  • decrease
  • water potential
  • solute potential
  • solute
  • water

Question 5

Answer
  • Facilitated diffusion
  • Active Transport
  • Passive diffusion

Question 6

Question
Which type of molecules needs to be 'assisted' in crossing membranes?
Answer
  • Any water-soluble substances
  • Glucose
  • Polar molecules
  • Ions
  • Vitamin A
  • Smaller molecules

Question 7

Question
The equation for water potential in an animal cell is: water potential = solute potential
Answer
  • True
  • False

Question 8

Question
[blank_start]Intrinsic[blank_end] proteins exit across both [blank_start]phospholipid bilayers[blank_end]. Some are [blank_start]carriers[blank_end] and others allow [blank_start]active transport[blank_end] of [blank_start]ions[blank_end]. [blank_start]Extrinsic[blank_end] proteins are located in [blank_start]either surface[blank_end] of the [blank_start]phospholipid bilayer[blank_end]. These provide [blank_start]structural support[blank_end] and [blank_start]recognition sites[blank_end].
Answer
  • Intrinsic
  • phospholipid bilayers
  • carriers
  • active transport
  • ions
  • Extrinsic
  • either surface
  • phospholipid bilayer
  • structural support
  • recognition sites

Question 9

Question
Which of these do NOT affect the rate of diffusion?
Answer
  • Concentration gradient
  • Size of the diffusing molecules
  • Nature of the diffusing molecules
  • Temperature
  • Thickness of the exchange
  • Condition of the diffusing molecules

Question 10

Question
[blank_start]Water potential[blank_end] is the [blank_start]measure[blank_end] of the [blank_start]free energy[blank_end] of [blank_start]water molecules[blank_end] and is the [blank_start]tendency[blank_end] for [blank_start]water[blank_end] to [blank_start]move[blank_end].
Answer
  • measure
  • tendency
  • water
  • move
  • Water potential
  • free energy
  • water molecules

Question 11

Question
Label the diagram of a plant cell:
Answer
  • Plasmolysed
  • Flaccid
  • Turgid
  • Plasmolysed
  • Flaccid
  • Turgid
  • Plasmolysed
  • Flaccid
  • Turgid

Question 12

Question
Rate of diffusion equation: [blank_start]rate of diffusion[blank_end] = ([blank_start]surface area[blank_end] x [blank_start]difference in concentration[blank_end])/ [blank_start]length of diffusion pathway[blank_end]
Answer
  • rate of diffusion
  • surface area
  • difference in concentration
  • length of diffusion pathway

Question 13

Question
What factors affect the permeability of water?
Answer
  • Polarity of the molecules
  • Electric charge of the molecules
  • Molar mass of molecules

Question 14

Question
Passive diffusion is the [blank_start]passive movement[blank_end] of a [blank_start]molecule[blank_end]/[blank_start]ion[blank_end] down a [blank_start]concentration gradient[blank_end] from a region of [blank_start]high concentration[blank_end] to a region of [blank_start]low concentration[blank_end]. [blank_start]Facilitated[blank_end] diffusion is the [blank_start]movement[blank_end] of molecules/ions [blank_start]down[blank_end] a concentration gradient using protein [blank_start]carriers[blank_end]/[blank_start]channels[blank_end].
Answer
  • passive movement
  • molecule
  • ion
  • concentration gradient
  • high concentration
  • low concentration
  • movement
  • down
  • carriers
  • channels
  • Facilitated

Question 15

Question
Where does active transport takes place?
Answer
  • In muscle contraction
  • in nerve impulse transmission
  • In the absorption of glucose in the kidney
  • In the mineral uptake in plant root hair cells
  • In transpiration

Question 16

Question
Active transport is the [blank_start]movement[blank_end] of [blank_start]molecule[blank_end] or ion across a [blank_start]membrane[blank_end] [blank_start]against[blank_end] a [blank_start]concentration gradient[blank_end], using [blank_start]energy[blank_end] from the [blank_start]hydrolysis[blank_end] of [blank_start]ATP[blank_end] made by the cell in [blank_start]respiration[blank_end].
Answer
  • movement
  • molecule
  • against
  • membrane
  • concentration gradient
  • energy
  • hydrolysis
  • ATP
  • respiration

Question 17

Question
The process of Co-Transport: 1) Sodium ions are [blank_start]transported[blank_end] out of the cell into the blood, via active transport. 2) This creates a [blank_start]concentration gradient[blank_end] between the number of sodium ions [blank_start]inside and outside[blank_end] of the cell. 3) [blank_start]2[blank_end] sodium ions are attached to the binding sites on co-transport carrier proteins, along with [blank_start]1[blank_end] glucose molecule on the glucose binding site. 4) Protein [blank_start]carrier[blank_end] changed shape and moves the glucose molecule and sodium ions inside of the cell. 5) The glucose molecule and sodium ions move to opposite side of the cell, [blank_start]separately[blank_end]. 6) Glucose diffuse to the blood stream by [blank_start]facilitated diffusion[blank_end], along a concentration gradient. 7) Sodium ions goes into the blood stream through a [blank_start]sodium/potassium[blank_end] pump, by [blank_start]active transport[blank_end], against a concentration gradient.
Answer
  • transported
  • concentration gradient
  • inside and outside
  • 2
  • 1
  • carrier
  • channel
  • separately
  • as one
  • facilitated diffusion
  • passive diffusion
  • sodium/potassium
  • sodium/lithium
  • active transport
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