Part A :
Question 21 - 25
Choose the correct letter, A, B or C.
21 How does Clare feel about the students in her Year 12 science class?
aworried that they are not making progress
bchallenged by their poor behaviour in class
cfrustrated at their lack of interest in the subject
22 How does Jake react to Clare's suggestion about an experiment based on children's diet?
aHe is concerned that the results might not be meaningful.
bHe feels some of the data might be difficult to obtain.
cHe suspects that the conclusions might be upsetting.
23 What problem do they agree may be involved in an experiment involving animals?
aAny results may not apply to humans.
bIt may be complicated to get permission.
cStudents may not be happy about animal experiments.
24 What question do they decide the experiment should address?
aAre mice capable of controlling their food intake?
bDoes an increase in sugar lead to health problems?
cHow much do supplements of different kinds affect health?
25 Clare might also consider doing another experiment involving
aother types of food supplement.
bdifferent geneticstrains of mice.
cvarying amounts of exercise.
Complete the flowchart below.
Choose FIVE answers from the box and write the correct letter, A–H, next to Questions 26–30.
Possible reasons
26 Choose mice which are all the same 26.
27 Divide the mice into two groups, each with a different 27.
28
Put each group in a separate cage.
Feed group A commercial mouse food.
Feed group B the same, but also sugar contained in 28.
29
Take measurements using an electronic scale.
Place them in a weighing chamber to prevent 29.
30 Do all necessary 30.
a size
b escape
c age
d water
e cereal
f calculations
g changes
h colour