Chapter 3: Movement Of Substances Across the Substances · PDF fileModule Biology Trial Paper Collection ... 3.1 Movement Of Substances Across The Across The Plasma Membrane ... Movement
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SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014
3.1 Movement Of Substances Across The Across The Plasma Membrane
1. (a) Figure 4 shows the fluid-mosaic model of membrane structure.
Trial Kelantan 2010 Trial Johor 2011
No Marking scheme Marks
(a) Name the component of membrane Plasma membrane
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(b) Name the structures M, N, X , Y and Z.
P: Phospholipids Bilayer (State the component of structure P) Trail Pahang 09
S: Hydrophilic head
Q :Carrier protein
R :Pore protien
Z: Hydrophobic tails
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(c)
Trial Melaka 2009
Explain the main function of P
Acts as a barrier between the internal and external environment of the cell // Allows only Specific molecules to pass through it // provide the structural basis for all cell membrane.
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S
Z
Molecule P
Molecule Q Molecule R
SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014
All movements of substances have to pass through a plasma membrane. Explain why the
plasma membrane is known as a semi permeable membrane
P1- it only allows the passage of certain molecules and limits the passage of other molecules.
P2-It consists of two layers of phospholipids with protein molecules scattered in them
P3-Molecules that can pass through the plasma membrane easily are those that can dissolve
in lipid and small uncharged molecules.
P4- Molecules which cannot move through the plasma membrane but require proteins include
large molecules that do not dissolve in lipid and small charged molecules.
P5 Channel protein does not require the binding of a molecule and conformational change to
open.
P6Channel protein allows molecules to steadily diffuse across the membrane through
diffusion.
P7However a carrier protein allows specific molecules to cross the cell membrane by
undergoing a conformational change upon the binding of the molecule.
P8 The conformational change opens a hole through which the molecule can enter or leave a
cell.
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(b) The figure below shows a fluid mosaic model of the plasma membrane
Explain the functions of the structures X, Y and Z in the movement of substances across the plasma membrane
P1- Structure X allows hydrophobic molecules which can dissolve in lipids such as fatty acids, glycerol, steroid hormones, and vitamins A, D, E and K to move in and out of the cell.
P2-Structure Y allows bigger molecules which do not dissolve in lipids like glucose and
amino acids to move in and out of the cell.
P3-Structure Z allows small charged molecules to move in and out of the cell.
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SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014
3.2 The movement of substances across the plasma membrane in everyday life
Plant Cell
In an experiment, the palisade mesophyl cell is immersed in distilled water for a certain period of
time Trial SBP 2012
Trail Johor 2011
Type of solution Question & Marking Scheme
Solution A
Trail Johor 2011
(a) Based on the diagram, name the term use to describe the following/State the
properties of the following solution/state the type of solution Hypotonic/’hypotonic solution
(b) State the condition of the cell in the following solution
Turgid
(c) Explain the effect of the following solution to plant cell/ Explain what will happen to this cellular component F1- This cellular component/ plasma membrane is pushed against the cell wall
F2-The distilled water /solution is hypotonic to the cell sap
E1-Distilled water is hypotonic to the cell sap // cell sap hypertonic to distilled
water
E2- Water molecule diffuses into the cell by osmosis
E3-Vacuole Expand /swell up
E4- the cell are highly turgid /Any 3
Solution C
(a) Based on the diagram, name the term use to describe the following/State the
properties of the following solution/ state the type of solution
Hypertonic/Hypertonic solution
(b) State the condition of the cell in the following solution
Flaccid
(c) Name a physical process of plant cell in solution C Plasmolysis (d) Explain the effect of the following solution to plant cell/ Explain what will happen to
this cellular component
P1-The …solution is hyper tonic to cell sap
P2-Water molecule diffuses out of the large central vacuole by osmosis
P3-the plasma membrane pull away from the cell wall
P4-Plant cell become flaccid /any3
SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014
(a) Use a tick (/) in the correct column to identify solution L and solution M
Name of solution Distilled water 10% salt solution
Solution L /
Solution M /
Explain why paramecium has to pump its contractile vacuole when placed in 0.25 sucrose
solution
P1-0.25%sucrose solution is hypotonic to cytoplasm
P2-Water diffuses into that paramecium through osmosis
P3-Excess water has to be expelled, otherwise the paramecium will burst
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(b) Cells P is mixed with detergent. The detergent dissolves lipids. After 10 minutes, the mixture is examined under a microscope; no cells P were seen but the mixture turn red and cloudy. Explain why?
P1- Detergent dissolves the lipid in the plasma membrane. P2- Plasma membrane disintegrate/destroyed P3- Cytoplasm (of red blood cell) mix into the solution P4- Cell P is haemolysed AYN 3
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Type of solution Question& Marking scheme
Solution L
Trial Kedah 2008
State what your
observe( / )before P1 Normally get 1 marks
(a) Name a physical process that causes the changes in erythrocyte cells L and M.
/state the type of solution
crenation
(b) What are the characteristics /properties of the solutions used to soak :// state the type of solution(must have word SOLUTION) Hypertonic
(c) State the condition of the cell
Haemolysed
(c) Explain the effect of the following solution to plant cell/ Explain what will
happen to this cellular component/ Explain what happen on the red blood cells
in solution L/ Explain the phenomena(state the phenomena)
P1-The solution is hypertonic to the red blood cell
P2-Water molecule diffuses out of the cells by osmosis
P3-creanation occurs
SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014
(a) Graph in Diagram 1.2 shows the percentage of red blood cells that are burst or shrink when placed in salt solution of different concentration. Based on the graph given, state the concentration which is isotonic to blood plasma.
0.45 g/100 cm3
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(b) Explain your answer in (b)(ii).
Both percentage of haemolysis of red blood cells and percentage of crenation of red blood
Cells are zero (0%).
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(c) Comment on the osmotic pressure at Q.
F: The osmotic pressure inside the red blood cells is equivalent to its environment.
P2 : Amount of water moving in and out of the cells are the same,
P3 : therefore the size and structure of the red blood cells does not change
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SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014
(a) Name the process that is occurs in the diagram
Osmosis
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(b) What is the factors that affects that direction in (a)(i)
Relative concentration (of solute) inside and outside the cell
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(c) Give an explanation what will happen to the plant of there is no water
P1-soil become hypertonic
P2-water molecule diffuses out of the root cell by osmosis
P3-the plant cell become flaccid
P4-the plant become wilt
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(d) Explain the condition of plant after being spread with excess fertilizers
P1-excess fertilizers cause the soil becomes hypertonic
P2-water diffuses out from (cell) via osmosis
P3-palnt cell loses water and cells are plasmolysed
P4-hence plant wilt
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(e) A Chemical substance inhibits the respiration process in the root hairs cells of the plant. Explain the effect to the transport of the mineral ions into the root hair cells of the plant P1: The cell unable to produce energy // energy is not generated
P2: Active transport does not occur.
P3: Thus, mineral ions cannot be transported into the cell. /any 2
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SULIT 4551/2
Chapter 3: Movement Of Substances Across the Substances 2014