answer p3 2009(2)

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SULIT

4551/3BiologyKertas 3Ogos 20091 jam

SEKOLAH BERASRAMA PENUHBAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH/ KLUSTER

KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN PERCUBAAN SETARA

SPM 2009

BIOLOGI

KERTAS 3

PERATURAN PEMARKAHAN

UNTUK KEGUNAAN PEMERIKSA SAHAJA

Peraturan pemarkahan ini mengandungi 13 halaman bercetak

4551/3 [Lihat sebelah Hak cipta Sekolah Berasrama Penuh, 2009

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Mark Scheme Biology Paper 3 (4551/3)-SBP TRIAL 2009

1 (a) (i)KB0601 - Observation

Score Criteria

3 Able to state two different observations correctly

Sample answers :

1. In the first draw, a red button is drawn from pouch A and a white button is drawnfrom pouch B.2. In the fifth draw, a white button is drawn from each bag.(Students can pick any pair from the table but the two pairs must be of differentcombinations)

2 Able to state any one observation correctly. orAble to state any two incomplete observations ( any 2 criteria)

Sample answers:1. In the first draw, a red button is drawn from pouch A and a white button is drawn

from pouch B.2. In the second draw, two different buttons are drawn. ( incomplete because thecolourof button is not mention)

1 Able to state any one idea of observation.(any 1criterion)

Sample answers:1. Two buttons are obtained from each drawn2. White button is drawn more than red button3. Different combination of buttons are obtained4. Same combination of buttons are obtainedOr any other suitable answer.

0 None of the above or no response

1 (a) (ii) [KB0604 - Making inferences]

Score Criteria

3 Able to state two inferences correctly

Sample answer :1. Pouches A and B contain the same number of red and white buttons, eachbutton has the same chance of being drawn.

2. The draw is made randomly and every button has the same chance of beingdrawn

2 Able to make one logicalinference for any one observation orAble to make one logical and incomplete inference base on one criterion foreach observation.

Sample answer:1. Pouches A and B contain the same number of red and white buttons.2. Each button has the same chance of being drawn.3. The combination of red and white buttons drawn is being influenced by thenumber of draws.

Or any suitable answer


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1 Able to make an idea of inference with one criterion.

Sample answers1. There are 20 draws.2. Pouch A and pouch B have buttons // more than one type of buttons

Or any other suitable answer

0 Not able to response orwrong response.( Hypothesis statement is not accepted )

Sample answers :No matter what is the number of draws, the ratio of phenotypes always gives theratio of 3 red flowers to 1 white flower

1(b) KB061001 Controlling Variables

VariablePemboleh ubah

Method to handle the variableCara mengendali pemboleh ubah

Manipulated variable:Pembolehubah dimanipulasikan

Number of draws

Make // Take twentydifferentdraws andone buttoneach time from each pouch andreturn it back.

Responding variable:Pembolehubah bergerak balas

Combination of colours of the

button drawn

Observe and record the combination of colours in eachdraw.

( Observed and record verb )

Constant variable:Pembolehubah dimalarkan

The number of red and whitebuttons/ take one button from

each pouch each time

Fixeach pouch with 50 of red and 50 of white buttons /fixthe number of buttons taken out from each pouch

Score Criteria

3 All 6 ticks

2 4 to 5 ticks

1 2 to 3 ticks

0 None of the above or no response


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1(c) KB0611-Making Hypothesis

Score Criteria

3 Able to state a hypothesis to show a relationship between the manipulated variableand responding variable and the hypothesis can be validated, based on 3 criteria:

manipulated variable the number of draws responding variable ratio of phenotypes

relationship no matter what .. always // after .. must be

Sample answer:1. No matter what is the number of draws, the ratio of the phenotype always 3 redflowers to 1 white flower2. After twenty draws the ratio of the phenotypes must be 3 red flowers to 1 whiteflower

2 Able to state less accurate hypothesis to show a relationship between manipulatedvariable and responding variable base on 2 criteria.

Sample answer:1. The ratio of the phenotypealways3 red flowers to 1 white flower2.Aftertwenty draws the ratio of phenotypes is 3 to 1

1 Able to state idea of hypothesis to show a relationship between manipulatedvariable and responding variable base on 1 criterion.

Sample answer:1. Ratio of the phenotypes is always the same2. There are twenty draws / There are different draws

0 None of above orno response

1 (d) (i) KB0603 Measuring Using NumberScore Criteria

3 Genotypegenotip

Phenotypefenotip

Rr Red

Rr Red

Rr Red

Rr Red

rr White

Rr Red

RR Red

RR Red

rr Whiterr White

Rr Red

RR Red

rr White

Rr Red

rr White

Rr Red

Rr Red

RR Red

RR Red

Rr Red

Able to record all the genotypes and phenotypes in pairs correctly


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2 Able to record 15 - 19 genotypes and phenotypes in pairs correctly

1 Able to record 10 - 14 genotypes and phenotypes in pairs correctly

0 Able to record less than 10 genotypes and phenotypes in pairs correctly, noresponse orwrong response.

1(d) (ii) KB0606 Communicating

Score Criteria

3 Able to calculate and find the smallest ratio of the phenotypesSample answers:

Red flower : White flower

15 : 53 : 1

2 Able to write down the ratio of the phenotypesSample answers:

Red flower : White flower 15 : 5

1 Able to write down the value of the phenotypes onlySample answers:

15 : 5


1(e) KB0607 Space and time relationship

Score Criteria

3 Able to draw a genetic diagram with 3 criteria:

First criteria : Title of the genetic diagram ( Parents phenotypes,genotypes and gametes, F1 phenotypes, F1 genotypes andgametes, and F1 phenotypes ratio )

Second criteria : Write down F1 genotypes Third criteria : Ratio 3 : 1Sample answer:


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2 Able to draw genetic diagram with any 2 criteria

1 Able to draw genetic diagram with any 1 criterion


1(f) KB0608 Interpreting Data

Score Criteria

3 Able to state clearly and accurately the relationship between the number of drawsand phenotypes ratio based on the criteria:

P1- The bigger the number of draws

P2- phenotypic ratio of 3:1

Sample answer:1. The bigger the number of draws, the more likely it is to get the phenotypic ratioof 3:12. The smaller the number of draws, the less likely it is to get the phenotypic ratio

of 3:1

2 Able to state clearly but less accurate the relationship between the number ofdraws and phenotypes ratio.

Sample answer:1. Phenotypic ratio 3 : 1 depend on the number of draws2. The bigger the number of draws, the less likely it is to get the phenotypic ratio of3:1

1 Able to state the idea of the relationship .

Sample answer:1. Phenotypic ratio is 3 : 12. Phenotypic ratio is influence by the number of draws


(g) KB0609 - Define operationally

Score Criteria

3 Able to define operationally Mendels First Law of Inheritance based on the resultof the experiment with the 3 following aspects :

During the formation of gamete, the pair of red and white buttons ( Rr )

will be separated

only one of the button // only R allele or r allele will be found / carried ineach gamete.

Sample answer:The colours of flower is controlled by a pair of alleles represented by R, for redbutton and r, for white button. During the formation of gamete, the pair of red andwhite buttons ( Rr ) will be separated only one of the buttons // only R allele or rallele will be found / carried in each gamete.


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2 Able to state Mendels First Law of Inheritance base on 2 following aspects.

Sample answer:The pair of red and white button ( Rr ) will be separate only one of the button //only R allele or r allele will be found / carry in each gamete.

1 Able to state the idea of Mendels First Law of Inheritance base on 1 followingaspects.

Sample answer:The colours of flower is controlled by a pair of alleles represented by R, for redbutton and r, for white button.


(h) KB0605 Predicting

Score Criteria3 Able to predict the result accurately base on 3 criteria.

The phenotypic ratio

Fact

Explain the result

Sample answer:

The phenotypic ratio will not be // will not likely be 3:1.F : The less accurate result is due toE : the lesser draws of the button.

2 Able to predict the result less accurate base on 2 criteria.

Sample answer:The less accurate result is due to the lesser draws of the button.

1 Able to give idea of the result or base on 1 criteria.

Sample answer:The phenotypic ratio will be 3:1.



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(i) KB0602 Classifying

Score Criteria

3 Able to classify all material and function correctly.

Sample answer :

Material Function

Red buttons The red alleles

White button The white allele

Pouch A and B Nucleus / chromosome

Pair of button drawn Genotype/ phenotype of offspring

2 Able to classify 3 pairs correctly

1 Able to classify 2 pairs correctly

0 Able to classify 1 pairs or none of above orno response.


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Question 2

KB061201 Problem Statement

Score Criteria

3

Able to state the problem statement of the experiment correctly that include criteria:

Manipulate variables change in pH value Responding variables population growth rate ofLemna sp.

Relationship in question form and question symbol [?]

Sample answers:

1. Does the change in pH value affect the population growth rate of Lemna spplants.?

2. What is the effect of change in pH value on the population growth rate of Lemnasp.?

3. Which pH value is the most suitable for the increase in population ofLemna sp.?

2

Able to state the problem statement of the experiment with two criteria.

Sample answers:

1. Does the pH affect the population growth rate ofLemna sp. plants?

2. What is the effect of pH on the population growth rate ofLemna sp.?

3. What is the effect of pH value on the population / growth ofLemna sp.?

4. What is the effect of change in pH value on the population growth rate of Lemnasp.

5. Which pH is suitable to increase in population ofLemna sp.?

1

Able to state the of problem statement with one criteria.

Sample answers:

Does the pH affect the population / growth ofLemna sp. plants?

2. What is the effect of pH on the population / growth ofLemna sp. plants?

0x

Wrong or no response

Objective of investigation

Score Criteria

To investigate the effect of change in pH value on the population growth rate ofLemna sp. plants.


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KB061202 Hypothesis

Score Criteria

3

Able to state the hypothesis correctly according to the criteria:

Manipulate variables

Responding variables

Relationship of the variables

Sample answers:

1. The pH 7 is the most suitable for the increase in population ofLemna sp. plantscompared to pH 2 and pH 14.

2. The population growth rate of Lemna sp. plants is the highest in the pH 7compared to pH 2 and pH 14.

2

Able to state the hypothesis with two criteria

Sample answers:

1. Neutral medium is the most suitable for the increase in population of Lemna sp.plants compared to acidic and alkali mediums.

2. The population growth rate ofLemna sp. plants is the highest in neutral mediumcompared to acidic and alkali mediums.

1

Able to state the idea of the hypothesis.

Sample answers:

1. Neutral medium is the most suitable for the increase in population of Lemna sp.plants.

2. The population growth rate ofLemna sp. plants is the highest in neutral medium.

0x

Wrong or no response

Variables

Score Criteria

Able to state the three variables correctly

Sample answers:Manipulated variable: Different pH value / pH 2, pH 7 and pH 14Responding variable: The population growth rate ofLemna sp. plants.

// The increase in population ofLemna sp. plants.Controlled variable: Species ofLemna sp. // plant / volume of water /

concentration of nutrients / temperature / light intensity/ time


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KB061205 Materials and Apparatus

Score Criteria

3 Able to state all functional materials / 2*materials + 1*apparatus+ 4 other materials and apparatus for the experiment.

Materials: *Lemna sp. plants, *distilled water / dilute hydrochloric acid /sodium hydroxide solution, culture solution / pond water.

Apparatus: *Beaker // petri dish // container, measuring cylinder, pH paper /meter.

2

Able to state all functional materials / 2*materials + 1*apparatus+ 2 other materials and apparatus for the experiment.

1

Able to state all functional materials / 2*materials + 1*apparatus for the experiment.

0

x

Cannot state the functional materials and apparatus.

Technique

Score Criteria

Bonus

1m

Able to state the action on responding variable with an apparatus.

Sample answer:Count and record the number ofLemna sp. after 5 days.OrCalculate the population growth rate ofLemna sp. by using a formula :The population growth rate ofLemna sp. = Number ofLemna sp.

5 days

KB061204 Procedure

Score Criteria

3

Able to state five procedures P1, P2, P3, P4 and P5 correctly.P1 : Preparation of materials & apparatus(3P1)P2 : Operating fixed variable (3P2)P3 : Operating manipulated variable (1P3)

P4: Operating responding variable (2P4)P5 : Precaution (1P5)

2

Able to state three of any procedures P1, P2, P3, P4 and P5 correctly

1

Able to state two of any procedures P1, P2, P3, P4 and P5 correctly

0

Able to state one of any procedures P1, P2, P3, P4 and P5 correctly


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Example of Procedure:

1. Choose Lemna sp. plants of the same size.P1 P2 P2

P1P2

2. Choose // take three petri dishes of the same size.P1 P2

P1P2

3. Label the petri dishes as A, B and C.P1

P1

4. Pour 5 ml of distilled water into petri dish A, 5 ml of hydrochloric acid into petridish

P1 P2 P3 P2 P3B and 5 ml of sodium hydroxide solution into petri dish C.

P2R P3

P1P2P3

5. Test the pH value of each solution using pH paper (and record in a table).P3 P1

P1P3

6. Pour 5 ml of culture solution / pond water into each petri dish.P1 P2 P2

P1P2

7. Put 5 Lemna sp. plants into each petri dish.P1 P2

P1P2

8. Record in a table.P1

P1

9. Place the petri dishes on the table / near the window in the laboratory.P1 P2

P1P2

10. Change the solution in the petri dishes everyday.P5

P5

11. Count the number ofLemna sp. plants after 5 days.

P4 P2

P2

P412. Calculate the population growth rate ofLemna sp. plants.

P4

P4

13. Repeat the experiment / steps 1 until 11 to get the average result.P5

P5

14. Observe and record the result.P4 P4

P4

Data

Score Criteria

Bonus

1m

Able to tabulate the correct table with headings and units

Sample answers:

pH value

Number ofLemna sp. plants The population growthrate ofLemna sp.

plants (number/ 5 days)Day-1 Day-5Increase /Decrease

Neutral

Asidic

Alkali


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Conclusion

Score Criteria

Able to rewrite the hypothesis correctly.

Sample answers:

The pH 7 is the most suitable for the increase in population of Lemna sp. plantscompared to pH 2 and pH 14. (Hypothesis is accepted).

KB061203 Planning the Experiment

Score Criteria

3 Able to plan the experiment based on 7 9 ( ) of the following criteria: Statement of identified problem

Objective of study

Variables

Statement of hypothesis

List of materials and apparatus

Technique used

Experimental procedures

Presentation of data

Conclusion

2 Able to plan the experiment based on 4 6 ( ) of the criteria.

1 Able to plan the experiment based on 1 3 ( ) of the criteria.

0x

No response


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answer p3 2009(2)

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