Pp K2 Percubaan Sbp 2007

Mark Scheme, BIOLOGY Paper 2, Trial SBP 2007

MARK SCHEME

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No Section

Description/explanation

1Mark Scheme, a. Able to mark and label correctly BIOLOGY Paper 2, Trial SBP 2007 i DNA ii. Bases iii. Chromosomes b.

Able to state the chromosome number answer: 12

c.

d (i)

(ii)

(iii)

e (i)

(ii)

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a (i)

(ii)

(b)

1. a gene consists of a (short) segmen of DNA molecule 2. genes carried genetic information in form of sequence of nitrogenous base// A,G, T any one Able to name the unit of DNA answer: nucleotide

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Able to determine K answer: (Pentose ) sugar

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Able to complete the diagram base on following criteria: Correctly 1. paired base 2. position of polynucleotide 3. position of hydrogen bond

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Able to determine the sex answer: female

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Able to state the cause and explain the cause of Cri-du-Chat Syndrome Sample answer: 1. Chromosome mutation 2. a portion of chromosome number 5 was deleted// break off TOTAL Able to name Q answer: vascular bundle

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Able to state two tissues answer: 1. xylem 2. phloem

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Able to explain the adaptation of P base of the following criteria F : structure of cell E : function of the structure 2 Sample anwer: F : The palisade mesophyll cells are cylindrical//

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Mark Scheme, BIOLOGY Paper 2, Trial SBP 2007

END OF MARK SCHEME

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