Revision questions Y10 exam mark scheme     Total 62 marks
Mark schemes
Q1.
(a)    
extra lines cancel
3
(b)     Cell wall
in either order
1
Chloroplast
allow (permanent) vacuole
1
[5]
Q2.
(a)     (i)    large intestine = E
1
small intestine = D
1
stomach = B
1
(ii)      
extra lines cancel
3
(b)    The concentration in the blood is lower.
1
[7]
Q3.
(a)     (i)      C and D
no mark if more than one box is ticked
1
(ii)     any one from:
do not allow if other cell parts are given in a list
•        (have) cell wall(s)
•        (have) vacuole(s)
1
(b)     (i)      A
apply list principle
1
(ii)     D
apply list principle
1
(c)     respiration
apply list principle
1
[5]
Q4.
(a)      (i)     18
1
(ii)     Z
1
(b)     (i)      red blood cells
1
(ii)     haemoglobin
1
[4]
Q5.
(a)      leprosy
allow bone / blood cancer
ignore cancer
1
(b)     (i)      6 / six
1
(ii)     from 1120 to 5600
allow from 5600 to 1120
allow 4480 (alone)
1
(c)     any one from:
ignore side effects, eg allergies
ignore safety / harm unqualified
•        (test for) toxicity
allow poisonous
•        (test for) dosage
allow idea of amount
•        (test for) efficacy.
allow to see if it works
allow to check for interaction with other drugs
1
(d)     (i)      any two from:
ignore reference to cost / addiction
•        more people take / use legal / non-prescribed drugs
•        legal / non-prescribed drugs are (more) readily available
•        alcohol causes liver / brain damage
or
tobacco causes cancer.
allow harmful effects of other named legal non-prescribed drugs
2
(ii)      addiction / dependency
allow withdrawal or examples of symptoms of withdrawal (if attempting to stop)
1
[7]
Q6.
(a)     (i)      64
1
(ii)     36
allow e.c.f from (i) i.e. 100 − answer given in (a)(i)
1
(iii)    any one from:
•        only considers 16-year-olds
ignore lack of evidence
allow does not refer to all ages
•        only about some / 5 countries
allow does not refer to all countries.
1
(b)     the more exercise done the healthier a person is
allow the more exercise done the higher the health rating
allow the less exercise done the lower the health rating
1
(c)     having a high cholesterol level
1
(d)     (i)      antibodies
1
(ii)     antibiotics
1
[7]
Q7.
(a)      (i)     capillary
1
(ii)     diffusion
1
(b)     (i)      Z
ignore any names
1
(ii)     large / increased surface / area / or to absorb more food or improved diffusion
allow all food absorbed
1
[4]
Q8.
(a)

4 correct = 4 marks
3 correct = 3 marks
2 correct = 2 marks
1 correct = 1 mark
extra line from a structure cancels the mark
4
(b)     diffusion
1
[5]
Q9.
(a)      A = nucleus
allow phonetic spelling
1
B = (cell) membrane
1
(b)     for repair / growth or to replace cells
ignore new cells / skin
1
(c)     (i)      embryos
1
(ii)     paralysis
1
[5]
Q10.
(a)     (i)      alveoli / alveolus
allow air sacs
allow phonetic spelling
1
(ii)     any one from:
•        protection (of lungs / heart)
•        help you breathe / inflate lungs.
1
(b)     (i)      diffusion
1
(ii)     capillaries
1
(iii)    any two from:
•        (have many) alveoli
allow air sacs
•        large surface / area
•        thin (exchange) surface or short diffusion pathway
accept only one / two cell(s) thick
•        good blood supply / many capillaries
allow (kept) ventilated or maintained concentration gradient.
2
[6]
Q11.
(a)     osmosis
1
partially permeable
1
(b)     (i)      any two from:
allow correct answers in terms of A
•        vacuole is small(er)
•        cytoplasm has shrunk
allow cytoplasm is smaller
•        gap between cytoplasm and cell wall
•        cell wall curves inwards
allow cell B is flaccid or cell A is turgid
•        the (cell) membrane has moved away from the wall
2
(ii)     any one from:
•        water will move / diffuse in
•        (cells) will swell
•        (cells) will burst
ignore turgid
1
(c)     villi give the small intestines a large surface area
1
villi have many blood capillaries
1
[7]