juj pahang spm 2014 biology k3 set 2 skema
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8/10/2019 JUJ Pahang SPM 2014 Biology K3 Set 2 Skema
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SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014 (SET 2 ) 4551/3
1SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014
Question 1
No Mark Scheme Score
KB0603 Measuring Using Number
1(a)
Able to record all 3 readings for the time taken for salt solution to
move from mark A to mark B.
Number of triangles surfaces Time taken/min
4 42
8 28
16 13
3
Able to record any 2 readingscorrectly . 2
Able to record any 1 readingcorrectly. 1
No response or one reading0
KB0601 - Observation
1
(b)(i)
Able to state two correct observations based on the following
aspect :
P1 : Number of triangles surfaces
P2 : Time taken for salt solution to move from mark A to mark B
Sample answer
1.
When the number of triangles surfaces is 4, the time taken
for salt solution to move from mark A to mark B is 42
minutes.
2. When the number of triangles surfaces is 16, the time taken
for salt solution to move from mark A to mark B is 13
minutes.
3.
Increase the number of triangles surfaces increase the time
taken for salt solution to move from mark A to mark B .
3
Able to state one correct observation and one inaccurate
observation or able to state two inaccurate observation.
Sample Answer:
1.
When the number of triangles surfaces is 4, the time taken
for salt solution to move from mark A to mark B is the long.
2
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2SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014
2.
When the number of triangles surfaces is 16, the time taken
for salt solution to move from mark A to mark B is shortest.
3. The number of triangles surfaces affects / influence the time
taken for salt solution to move from mark A to mark B.
Able to state one correct observation or able to state two
observations at idea level.
Sample Answer:
1. Time taken for Time taken for salt solution to move from
mark A to mark B are 42 min / 28 min / 13 min.
2.
Time taken for Time taken for salt solution to move from
mark A to mark B increased / decreased
3.
Time taken for Time taken for salt solution to move frommark A to mark B change.
1
No response or wrong response. 0
Scoring
Correct Inaccurate Idea Wrong Score
2 - - - 3
1 1 - -2
- 2 - -
1 - 1 -
1- - 2 -
1 - - 1
- 1 1 -
- 1 - 10
- - 1 1
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3SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014
KB0604 - Making inference
1(b)(ii)
Able to state two inferences correctly based on the following
aspect:
P1 : surface area
P2 : diffusion of distilled water / rate of diffusion
Sample answer
1.
(4 triangular) increase / more the total surface area (of the
potato block), increase rate of diffusion / more ( water will
diffuse into the potato block.
2. (16 triangular) decrease total surface area of the potato block
is the decrerase, rate of diffusion of (water) into the potato
block
3. The surface area of the potato block is the lowest/highest, rate
of distilled water diffusion is lowest/highest.
3
Able to make one correct inferences and one inaccurate
inference
Sample answers:
1. The rate of diffusion is highest / lowest.
2.
The total surfaces area is the highest / lowest.
2
Able to state one correct inference and one inference at idea level.
Sample Answer:
1. Water diffuse into potato block
1
No response OR wrong response.
Scoring:
Score Correct Inaccurate Idea Wrong3 2 - - -
21 1 - -
- 2 - -
1
1 - 1 -
- - 2 -
- 1 1 -
0- 1 - 1
- - 1 1
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4SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014
KB0610-Controlling variables
1(c)
Able to state all 3 variables and the 3 methods to handle the variable
correctly.
Sample Answer :
VariablesMethod to handle the variable
correctly
Manipulated variable
Number of triangles
surfaces / Total surface
area
Use different number of triangles
(surfaces which are 4, 8, 16 )/
Change the number of triangles
surfaces that are 4, 8, 16.
Responding variable
Duration/ Time taken for
salt solution to move from
mark A to mark B/ Rate
of Diffusion
Measure and recordthe time taken
for salt solution to move from mark
A to mark B by using stopwatch.
Calculate the rate of diffusion by
using the formula:
Distance from A to B , cm
Time taken for salt solution to move
from mark A to mark B, min
Constant variableConcentration of salt
solution / Distance from
A to B / Size of potato
block
Fix the same concentration of salt
solution that is 10%. / Fix the same
distance from A to B which is 3 cm /
used the same size of potato block is
5cm x 7cm
All 6 ticks
3
Able to state 3- 5 ticks 2
Able to state 1-2 ticks 1
No response or incorrect response0
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KB0611-State hypothesis
1 (d) Able to make a hypothesis based on the following aspect :
P1 : Manipulated variable ; Number of triangular surface / totalsurface
P2 : Responding variable ; Time taken for salt solution move from
A to B / rate of diffusion
R : Relationship
Sample Answer :
1.
The higher / the number of triangles surfaces, the shorter the
time taken for salt solution to move from A to B./ vice versa
2.
The higher the total surfaces area of potato block, the shorterthe time taken for salt solution to move from A to B./ vice
versa
3.The higher the number of triangles surfaces, the higher the
rate of water diffusion./ vice versa
4.
The higher the total surfaces area of potato block, the shorter
the time taken for salt solution to move from A to B/ vice
versa
3
Able to make a hypothesis relating the manipulated variable andresponding variable inaccurately
Sample Answer:
1.
Different number/size of triangles surfaces, different the time
taken for salt solution to move from A to B.
2. The number/size of triangles surfaces, affects the time taken
for salt solution to move from A to B.
3. The number/size of triangles surfaces, effects the rate of
water diffusion
2
Able to state a hypothesis relating the manipulated variable at
idea level, with one aspect correctly.
Sample Answer :
1. Different number / size of triangles
2. Different rate of diffusion
1
No response or wrong response if no P1 or P2 no mark for each. 0
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KB0606 Communicating data
1(e)(i)
Able to construct a table which contain the following aspects:
P1: Able to state the 3 titles with unitscorrectly.P2 : Able to record all data correctly.
P3 : Able to calculate the rate of diffusion
Sample answer :
Number of
triangular
surfaces
Time taken for salt
solution to move
from A to B,/cm
Rate of
Diffusion,/cmmin-1
4 42 0.07
828 0.11
16 13 0.23
3
Any two aspects correct2
Any one aspect correct 1No response or wrong response. 0
KB0607 Relationship between space and time
1(e)(ii)
Able to plot the graph correctly :
Criteria:
P : Correct Axis with label, uniform scale and unit
: Y axis, Rate of Diffusion
: X axis, Number of triangles surfaces
T : All points plotted
B : Joint all 3 points
3
Any two criteria 2
Any one criteria. 1
No response or wrong response.
0
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7SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014
KB0608 Interpreting the data
1(f)
Able to explain the relationship between the number of
triangular surface and the rate of diffusion accurately.
Sample answer:
R1: Increase the number of triangular surface increase the rate of
diffusion of water
E1: Increase total surface area
E2: More water molecule diffuse in the potato block in the short
time
All three aspects
Note : If R1 wrong, reject E1 & E2
3
Two aspects including R1
Example : R1 + E1 / R1 + E22
Only R1 stated 1
No response or incorrect response 0
KB0609 Defining by operation
Able to state the operational definition of rate of diffusion based on
the following aspects:
P1 : Shows time taken of salt solution move from A to B
P2 : in different number of triangular surface of potato block
P3 : increase the total surface of potato, increase rate of diffusion
of water // rate of diffusion of water depends on the total
surface of potato block
Sample answer
The rate of diffusion is time taken for salt solution to move from A
to B when different number/size of triangles surface is used.
Increase the total surface area of potato block, increase the rate of
diffusion / of (distilled water) diffused into the potato block .
3
Any two criteria stated 2
Any one criteria stated // theoretical definition 1
No response or wrong response.0
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KB0605 - Predicting
1(h)
Able to predict using all the following criteria :
P1 : Correct prediction , state the value
E1 : Reason
E2 : Effect
Sample answer
P1 : Time taken for salt solution move from A to B is less than 13
minutes // any value less than 13minutes .
E1: High gradient concentration between distilled water and 30%
salt solution
E2: The rate of water diffusion into potato block will be faster /Increase / more than 0.23cmminutes-1// More water molecule
diffuse into potato block in the short time.
3
Any two aspects:
P( idea) + 2E // P1 + 1E // P1 + E2
2
Any one aspect:
P( idea) + E1 // P1 (idea) + E2
1
No response or wrong response 0
KB0608 Interpreting the data
1(i)
Able to classify all the organ in table correctly:
Organs having well adapted
surfaces for their effectivefunction
Organs without surfaces well
adapted fortheir effective function
Small intestinesLungs
Brain
EsophagusPancreas
LiverHeart
3
Able to get 4-6 tick correctly2
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Able to get 2-3 tick correctly 1
No response or wrong response0
TOTAL SCORE - 11 X 3 = 33 marks
QUESTION 2
PROBLEM STATEMENT (01)
No. Mark Scheme Score
2(i)
KB061201
Able to state a problem statementrelating the manipulated variable
(MV) with the responding variable (RV) correctly
3
3P
P1 : Manipulated Variable
(Substrate concentration)
P2 : Responding variable
(Rate of enzyme reaction // time taken for iodine reaction remain
unchanged)
P3 : Relationship between the variables in a question form
(Question form)
Sample Answer :
1. What is the effect of concentration of starch suspension on the
rate of amylase / enzyme reaction / activity ?
2. How does the concentration of starch suspension / substrate
affects the rate of amylase /enzyme reaction / activity ?
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10SKEMA PEMARKAHAN PRAKTIS BESTARI JUJ PAHANG 2014
Able to state a problem statement with two aspects.
Sample Answers:
1. What is the effect of starch suspension concentration on
amylase?
2. How does starch suspension affect the rate of reaction /
activity of amylase / pepsin?
3. What is the effect of concentration of starch suspension on the
rate of amylase / enzyme reaction / activity
2
P1, P2
P1, P3
P2, P3
Able to state a problem statement with one aspect.Sample answer
1. What is the amylase concentration?
2. Starch / substrate concentration affects amylase.
1
P1 / P2
No response or incorrect response
** Only P3 Reject0
HYPOTHESIS (02)
No. Mark Scheme Score
2 (ii)
KB061202
Able to state the hypothesis correctly by relating two variables.
Criteria set:
P1 : Manipulated Variable
(Substrate concentration)
P2 : Responding variable
(Rate of enzyme reaction // time taken for iodine reaction remain
unchanged)
P3 : Show the specific relationship and direction between the
manipulated variable and the responding variable
3
3Ps
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Sample Answer :
1.
The rate of amylase / pepsin / enzyme reaction /activity
increases with the increase in starch concentration (until it
reaches a maximum rate).
2. As the concentration of starch increases the time taken for the
hydrolysis of starch/ albumen to be completed increases.
Able to state a hypothesis inaccurately based on any two aspects.
2
Sample answer
1. Starch concentration increases the rate of enzyme / amylase
reaction / activity.
2. Enzyme concentration affects the rate of amylase
/enzyme reaction / activity
Able to state a hypothesis at idea level
Sample answer
1. The rate of amylase activity change
2. The time taken for the hydrolysis of starch change 1
No response or incorrect response 0
VARIABLES (03)
No. Mark Scheme Score
2 (ii) Able to state all threevariablescorrectly
KB061203 3Sample answer
1. Manipulated :
Starch / substrate concentration
2. Responding :
Time taken for iodine solution remain unchanged // Rate of
enzyme reaction
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3. Fixed :
Volume of starch suspension / enzyme // Concentration of
enzyme solution // Temperature of water bath.
Able to state any two variables correctly2
Able to state any one variables correctly1
No response or incorrect response0
LIST OF APPARATUS AND MATERIALS (04)
2 (iv) KB061205
Apparatus Materials Score
Test tubes, beakers, Stop watch
Syringes, Termometer, Glass
rods
White tile ( with groove)
Droppers
Amylase solution,
Starch suspensions , iodine
solution, distilled water
3
7- 8A + 4M
Amylase solution,
Starch suspensions , iodine
solution
25 - 6A + 3M
Amylase solution,
Starch suspensions , 1
3 - 4A + 2M
PROCEDURE ( 05)
2 (v)KB061204
No Description Keywords Ks
1.Four test tubes are labelled A to D labelled K1
2.Each test tube is added the following mixtures.
A : 5 ml 0.2% starch suspension
B : 5 ml 0.4% starch suspension
C : 5 ml 0.6% starch suspension
D : 5 ml 0.8% starch suspension
5ml K2
0.2%, 0.4%, 0.6%, 0.8% K4
3. The test tubes are immersed in water bath at 37oC immersed K1
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37oC K2
4.Drops of iodine solution are added separately onto the grooves
of a white tile using a syringeDrop K1
5. 1 ml of 1% amylase is added into each test tube 1ml & 1% K2
6. The stopwatch is started immediately (0 minute)start K1
7. The contents are stirred with a glass rod.A drop of mixture is
tested with iodine solution on the white tile. At every sampling
the dropper must be rinsed with clean distilled water.
stiredK1
dropper must be rinsed with
clean distilled water.K5
tested with iodine solutionK1
8The step is repeated at 30 second intervals until the mixture
stops turning blue black in colour when tested with iodine
solution.
activated K1
9.Time taken for the hydrolysis of starch to be completed is
recorded by using stopwatch.Record , stopwatch K3
10.The data is recorded in the table.
Record, table K1
11. Steps 4-10 are repeated with test tubes B, C, and D Repeat - B, C, D K1
12. Experiment is repeated three times to get accurate reading /
result.
repeated three times /
accurate
K5
K1 : Preparation of materials and apparatus (any 5)
K2 : Operating the constant variable (any 1)
K3 : Operating the responding variable (any 1)
K4 : Operating the manipulated variable (any 1)
K5 : Steps to increase reliability of results accurately / precaution (any 1)
No. Mark Scheme Score
2 (v)
Able to describe all the Ks
5 K
3
Any 3-4 K2
Any 1-2 K 1
No response or incorrect response0
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PRESENTATION OF DATA ( 06)
2 (vi)KB061203
No. Mark Scheme Score
2 (vi)
Able to construct a table to record data based on the following criteria:
P1 : Manipulated Variable
P2 : Operating RV and RV with unit
Sample answer:
Concentration of
starch suspension
(%)
Time taken the hydrolysis of
starch to be completed // iodine
remain unchanged ( minutes )
Rate of enzyme
reaction
= 1 _
Time
( minute-1 )
0.2
0.4
0.6
0.8
2
KB061203
Able to construct a table to record data based on one aspect only1
No response or incorrect response0
END OF MARKING SCHEME
P1
P2
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