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5129 w13 ms 22.pdf


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Mark Scheme
GCE O LEVEL – October/November 2013

Paper
22

plasma
red blood cells
lungs
capillaries
valves

[5]

(a) chlorine (accept correct formula)

[1]

(b) hydrogen/chlorine (accept correct formulae)

[1]

(c) oxygen (accept correct formula)

[1]

(d) nitrogen
hydrogen (accept correct formulae) either order

[2]

(a) 3

[1]

(b) vertically down

[1]

(c) 0.14

[1]

(a) 88
allow ecf if working shown for incorrect addition
allow 1 mark for correct addition = 12%

[2]

(b) correct temperature
sterile/hygenic
develops jaw muscles
promotes bonding (between mother and baby
always available/no preparation time
contains antibodies/immunity against infection
ignore cost/convenience
5

Syllabus
5129

any 3
[3]

(a) (i) D
(ii) C
(iii) F

[3]

(b) C and F (both in ether order)

[1]

(c) B

[1]

© Cambridge International Examinations 2013