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OCR (Oxford, Cambridge and RSA Examinations) is a unitary awarding body, established by the
University of Cambridge Local Examinations Syndicate and the RSA Examinations Board in
January 1998. OCR provides a full range of GCSE, A level, GNVQ, Key Skills and other
qualifications for schools and colleges in the United Kingdom, including those previously
provided by MEG and OCEAC. It is also responsible for developing new syllabuses to meet
national requirements and the needs of students and teachers.…read more

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CONTENTS
GCSE Gateway Additional Science B J641
MARK SCHEMES FOR THE UNITS
Unit/Content Page
Mark Scheme Guidance 1
B623/01 Unit 1: Modules B3, C3 and P3 Foundation Tier 2
B623/02 Unit 1: Modules B3, C3 and P3 Higher Tier 11
B624/01 Unit 2: Modules B4, C4 and P4 Foundation Tier 23
B624/02 Unit 2: Modules B4, C4 and P4 Higher Tier 33
Grade Thresholds 43…read more

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Mark Scheme Guidance
Abbreviations, annotations and conventions used in the detailed Mark Scheme.…read more

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B623/01 Mark Scheme June 2008
B623/01 Unit 1: Modules B3, C3 and P3 Foundation Tier
Question Expected Answers Marks Additional Guidance
1 a i X in nucleus (1) 1 centre of X inside nucleus
allow correct label line touching or inside nucleus
ii (cell) membrane (1) 1 more than one answer (0)
allow other ways of showing correct answer
iii (egg cell) joined / combine (1) 2 allow enter
with sperm (cell) / male gamete / ignore meet
male (sex ) cell (1) allow higher…read more

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B623/01 Mark Scheme June 2008
Question Expected Answers Marks Additional Guidance
2 a lungs (1) 2 allow air sacs / alveoli (1)
(small) intestine / digestive system / alimentary allow gut
canal (1) not large intestine
not stomach
allow capillaries for either to max 1
b i pump blood (1) 1 allow send blood around body (1)
ignore transport
ignore pumps oxygen
ii semi-lunar (valve) (1) 1 allow aortic (valve)
iii blood does not (all) flow in correct direction / AW (1) 1 allow can…read more

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B623/01 Mark Scheme June 2008
Question Expected Answers Marks Additional Guidance
3 a i leaf (1) 1 allow higher level answer stomata (1)
ii diffusion (1) 1 not photosynthesis / respiration
more than one answer (0)
b i runners (1) 2 allow descriptions / drawings and labels (1)
(produce) plantlets (1) e.g. sends out stems along the ground (1) new plants grow at the
ends (1)
e.g.…read more

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B623/01 Mark Scheme June 2008
· All formulae must be totally correct e.g. CO2 and not CO2 / CO2 ; SO42- and not SO42-, So42-, SO42- (any subscripts must be at least marginally
smaller than the atomic symbol and superscripts must be at least slightly above the symbol)
· Symbols must be as shown in the periodic table e.g.…read more

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B623/01 Mark Scheme June 2008
Question Expected Answers Marks Additional Guidance
6 a any two from: 2 ignore good conductor of electricity
high melting point (1) allow coloured compounds
high boiling point (1) ignore solid / waterproof
strong (1)
malleable (1) ignore mouldable / magnetic / durable /
ductile (1) ignore easy to shape unless qualified e.g.…read more

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B623/01 Mark Scheme June 2008
Question Expected Answers Marks Additional Guidance
7 a 3 / three (1) 1
b 3 / three (1) 1
Total 2
8 a copper ­ blue and 1 both required for 1 mark
iron(II) - light green (1)
b i limewater / calcium hydroxide solution / Ca(OH)2 (1) 2 allow bicarbonate indicator (1)
turns cloudy / milky / white / white precipitate (1)
allow turns yellow if linked to bicarbonate indicator (1)
ii copper carbonate copper oxide + carbon dioxide…read more

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