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Exam-style answers
Question
Answers
B6 Preventing
and treating
disease
Extra information
Mark
AO /
Spec Ref
01.1
Flu is caused by a virus
Antibiotics only kill bacteria
1
1
AO1
B3.1.2
01.2
Relieve/treat symptoms
1
AO1
B3.1.8
02.1
decrease
rate of decrease slows
1
1
AO2
B3.1.8
WS3.5
02.2
any one from:
 more use of disinfectant
 more use of hand washing
 more careful/more often cleaning
of patient facilities
 raised awareness/education about
hygiene
Explanation: stops/reduces the
bacteria being transferred/spreading
allow any reasonable
increase in hygiene or
sterilisation precautions
1
AO2
B3.1.8
WS3.6
800 - 500
 100 =
800
correct answer with or
without working gains
2 marks
02.3
37.5 (%)
02.4
any one from:
 numbers quite low now so hard to
reduce further
 was a big campaign/much
publicity (in 2009) so more people
already doing it
 hygiene/cleaning now good so
hard to improve
 hospitals short of money so less
staff to clean
03.1
dead/inactive/weakened
pathogen/bacterium/virus/
microorganism
© Oxford University Press 2016
1
allow antigen/protein
ignore ref. to other
components
ignore small amount
ignore germs/disease
www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original.
1
1
AO2
B3.1.8
WS3.2
WS3.3
MS1c
MS4a
1
AO3
B3.1.8
WS1.4
WS1.5
WS3.5
1
1
AO1
B3.1.7
WS1.4
1
Exam-style answers
Question
Answers
03.2
white blood cells produce/release
antibodies
antibodies produced quickly
(these) antibodies destroy the
pathogen
B6 Preventing
and treating
disease
Extra information
antigen/antibiotic instead
of antibody = max 2
accept lymphocytes/
leucocytes/memory cells
produce antibodies
do not accept
phagocytes
allow kill
do not accept antibodies
engulf pathogens
Mark
AO /
Spec Ref
1
AO1
B3.1.6
B3.1.4
WS1.4
1
1
03.3
(live) bacteria still in body
would reproduce
Ignore numbers
Ignore mutation/growth
1
1
AO2
B3.1.8
B6.3.4
WS1.4
WS3.5
03.4
antibiotics/treatment ineffective or
resistant pathogens survive
these reproduce
population of resistant pathogens
increases
accept resistant outcompete non-resistant
1
AO2
B3.1.7
B3.1.8
B6.3.7
WS1.4
04.1
04.2
any one from:
 cells
 tissues
 (live) animals/named
any three from:
(to test for)
 toxicity/check not poisonous/
not harmful
 interaction with other drugs
 efficacy or to see if they work or
to check if they treat the disease
 dosage or how much is needed
© Oxford University Press 2016
allow (resistant
pathogens reproduce)
rapidly
1
AO1
B3.1.9
WS1.4
3
AO1
B3.1.9
WS1.4
WS1.5
allow mammals
allow side-effect
allow converse
allow converse
www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original.
1
1
2
Exam-style answers
Question
04.3
Answers
any six from:
 statins can damage/muscles/
kidneys/organs but cholesterol
blockers don’t
 statins can cause death but
cholesterol blockers don’t
 cholesterol blockers can interfere
with action of other drugs but
statins don’t
 statins are for a life time but
cholesterol blockers are not
 statins (might) reduce cholesterol
to zero but cholesterol blockers
only reduce it or statins reduce
cholesterol more
 statins better for people with
inherited high cholesterol
 cholesterol blockers better for
people with dietary cholesterol
problems
 taking/using statins/cholesterol
blockers is better than dying from
heart attack or build-up of fat in
blood vessels or reduced blood
flow
© Oxford University Press 2016
B6 Preventing
and treating
disease
Extra information
comparison can be
written
anywhere in evaluation
allow use of ‘only’ for
implied comparison for
each point, e.g., only
statins damage
muscles/kidneys/organs
ignore liver
6
AO /
Spec Ref
AO3
B2.2.4
B3.1.9
WS1.4
WS1.5
if neither of the first, 2
points are given, accept
for 1 mark statins are
more dangerous than
cholesterol blockers or
statins have more side
effects
allow statins (might) stop
membrane/hormone
production but
cholesterol blockers don’t
www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original.
Mark
3