Questions
Q1.
Drugs
In the USA, 2.7 million people admitted using illegal drugs.
The pie chart shows the percentage of these people using different illegal drugs.
(a) (i) Calculate the number of people who admitted using marijuana illegally.
(2)
answer = . . . . . . . . . . . . . . . . . . . . . . . million people
(ii) Suggest one reason why the information in the pie chart may not be reliable.
(1)
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Marijuana is often smoked with tobacco.
Suggest why combining tobacco with marijuana makes it more difficult to give up smoking marijuana.
(2)
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(i) Which of these drugs is a stimulant?
Put a cross (
) in the box next to your answer.
(1)
A alcohol
B caffeine
C LSD
D morphine
(ii) Explain how stimulants affect reaction times.
(2)
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Q2.
(a) The graph shows the percentage risk of developing lung cancer for 75-year-old men who gave up
smoking tobacco at an earlier age.
(i) Describe the trend shown in the graph.
(1)
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(ii) State the percentage risk of lung cancer for a man who gave up smoking at 50 years of age.
(1)
. . . . . . . . . . . . . . . . . . . . . .%
(iii) For a population of 500 000 men, how many would be likely to develop lung cancer if they stopped
smoking at
the age of 50?
(2)
. . . . . . . . . . . . . . . . . . . . . .men
(b) (i) Explain why smoking tobacco increases the risk of developing lung cancer.
(2)
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(ii) Complete the sentence by putting a cross (
) in the box next to your answer.
Smoking tobacco reduces the oxygen carrying ability of the blood because it contains
(1)
A carbon monoxide
B carbon particles
C nicotine
D tar
(c) A chemical in tobacco acts as a stimulant.
Explain how stimulants affect neurotransmission.
(3)
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(Total for Question = 10 marks)
Q3.
Cigarette smoke contains carbon monoxide.
Explain the effect of breathing in carbon monoxide on the function of the blood.
(3)
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Q4.
Marijuana is often smoked with tobacco.
Suggest why combining tobacco with marijuana makes it more difficult to give up smoking marijuana.
(2)
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Q5.
(i) Explain why smoking tobacco increases the risk of developing lung cancer.
(2)
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(ii) Complete the sentence by putting a cross (
) in the box next to your answer.
Smoking tobacco reduces the oxygen carrying ability of the blood because it contains
(1)
A carbon monoxide
B carbon particles
C nicotine
D tar
Mark Scheme
Q1.
Answer
(a)(i)
(a)(ii)
(b)
(c)(i)
(c)(ii)
substitution (1)
2700000/100 or
27,000 evaluation (1)
27000 × 56 =
1.512 (million
people) / 1.5
not every person
was questioned / not
all people
questioned would
give a correct
answer /be honest /
people may have
taken more than one
type of drug /
reference to date so
may not be relevant
Any two of the
following points
• tobacco contains
nicotine (1)
• is addictive (1)
• it acts on
receptor sites in
the brain to make
you crave more of
the same drug (1)
B caffeine
An explanation
linking the following
points
• stimulants
reduce reaction
times/increase the
speed of reactions /
speed up reaction
times (1)
• by increasing
neurotransmission
(1)
• acts at the
synapse (1)
Acceptable
answers
give full marks for
correct answer, no
working Accept
1,512,000 (2 marks)
Mark
(2)
(1)
(2)
(1)
speed up
neurotransmission
(2)
(2)
Q2.
Answer
(a)(i)
(a)(ii)
(a)(iii)
the later that a
person gives up
smoking/the longer
you smoke for the
higher risk of lung
cancer
9 (%)
= 45 000 (1)
(b)(i)
(ii)
(c)
Acceptable
answers
ORA
(1)
(1)
2 marks for the
correct bald answer
if value other than 9
(2 – 14) inserted into
correct equation ecf
applies if calculation
is correct
An explanation
linking two of the
following:
•
tobacco
contains tar (1)
•
tobacco/tar
contains carcinogens
/ causes mutations
/is cancer forming (1)
•
nicotine in
tobacco is addictive
which makes it
difficult to give up
/causes people to
smoke for longer (1)
A
carbon
monoxide
An explanation
including three of
the following:
•
(stimulants) act
at the synapse (1)
• more
neurotransmitters (1)
•
so speeds up
neurotransmission(1)
Mark
(2)
(2)
(1)
Accept increases
neurotransmitters
Accept decreases
reaction time/speeds
up reactions/ speeds
up brain activity
(3)
Q3.
Question
Number
Answer
Acceptable answers
Mark
An explanation
linking three of the
following points
• carbon monoxide
binds with red blood
cells (1) • containing
accept blood for red
blood cells Accept
oxyhaemoglobin less
oxygen is carried in
the blood Accept
references to
(3)
haemoglobin (1)
• this reduces the
oxygen carrying
capacity of the blood
(1)
carboxyhaemoglobin
Answer
Acceptable
answers
Any two of the
following points
• tobacco contains
nicotine (1)
• is addictive (1)
• it acts on
receptor sites in
the brain to make
you crave more of
the same drug (1)
Answer
(i)
(ii)
Mark
(2)
Acceptable
answers
Mark
An explanation
linking two of the
following:
•
tobacco
contains tar (1)
•
tobacco/tar
contains carcinogens
/ causes mutations
/is cancer forming (1)
•
nicotine in
tobacco is addictive
which makes it
difficult to give up
/causes people to
smoke for longer (1)
(2)
A
carbon
monoxide
(1)