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BIOLOGY
Diabetes
F-D
1 The table shows the weight categories for people with different BMI values. The formula
shows how BMI is calculated
BMI
18.5 or less
18.5 – 24.9
25.0 – 29.9
30.0 – 34.9
Weight category
underweight
normal
overweight
obese
Formula:
BMI 5 mass (kg)
​ ________________
  
  
 ​
height2 (m)
a) Calculate the BMI of a person with a mass of 65 kg
and a height of 1.67 metres. Show your working.
Make sure you are able to use
the formula to calculate BMI. To
work out height m2 you need
to multiply height by itself. For
example, if a person’s height is
1.68 metres the calculation will be
1.68 3 1.68. You then divide the
body mass by the height2.
Answer
(2 marks)
b) State the weight category of this person.
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2 The graph shows the percentage of people of
different body masses who have diabetes.
a) What percentage of obese people have
diabetes?
Percentage
E-C
(1 mark)
20
15
10
5
(1 mark)
Guided
b) Describe the trend shown by the graph.
The greater the body mass
Obese people are about
times
0
Healthy
Overweight
If you are asked to describe a trend you
need to say what the trend is but then
use some data to back up your answer.
more likely to
E-C
Obese
(2 marks)
3 There are two types of diabetes, Type I and Type II. People who have either type of diabetes
are unable to control the levels of glucose in their blood.
a) State which type of diabetes results from a person being resistant to insulin.
(1 mark)
b) Give two ways in which Type I diabetes can be controlled.
(2 marks)
c) Explain why a diabetic who takes regular exercise may not require as much insulin as a
diabetic who does not take regular exercise.
(2 marks)
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BIOLOGY
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Plant hormones
1 Complete the passage using words from the box. Each may be used once, more than once or
not at all.
photosynthesis gravitropism giberellins elongation phototropism auxin
Plants grow towards a light source. This is called positive
Roots grow towards gravity. This is known as positive
Tropisms are caused by a hormone known as
Other plant hormones
cause the growth of flowers and seeds in plants.
such as
(4 marks)
You need to make sure that you understand the key words
for this topic and you use them in any answers. Remember:
photo means ‘light’ as in photography; gravi means ‘heavy’
as in gravity, which gives you weight; geo means ‘related
to the ground’ as in geology. You can use geotropism or
gravitropism when answering questions.
E-C
2 The diagram shows how a plant shoot responds to light.
Light
a) Place an X on the diagram where auxins are produced.
b) Place a Y on the diagram showing where auxins travel to, causing the shoot to bend.
c) Place a Z on the part of the plant that shows positive gravitropism.
(3 marks)
Guided
3 Describe how auxins cause a plant to bend towards a light source.
Auxins are produced
The auxin moves
This makes the cells
(3 marks)
EXAM
ALERT
Students have struggled with exam
questions similar to this
– be prepared!
If a question asks about the direction of growth in a shoot,
you should describe the effect of light on auxin and how this
changes cell elongation, not just link the direction of light to
the curvature of the shoot.
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BIOLOGY
Biology extended writing 3
People with Type I diabetes are likely to make frequent visits to a doctor. The advice given by a
doctor to patients with Type I diabetes may include:
• Watch what you eat.
• Take more exercise.
The doctor will also prescribe medication for the patient that includes injections of a hormone.
Explain the advice given by the doctor to a patient with Type I diabetes and why the doctor
will prescribe injections of a hormone for this patient.
(6 marks)
You are more likely to get better marks on extended writing if you plan your answer before you start writing.
The question asks you to explain the advice given by the doctor to the patient with Type I diabetes and why
the doctor may prescribe injections of a hormone for his patient. Think about:
• what Type I diabetes is
• how controlling the diet can help someone with Type I diabetes
• how taking exercise can help someone with Type I diabetes
• the hormone needed by patients with Type I diabetes to control their blood sugar concentration
• why that hormone is important.
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