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A4
Homework
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Total breakdown
HELP
Question
Answer
1
Mouth before gullet. Gullet before stomach. Stomach before small intestine.
Small intestine before large intestine. Large intestine before anus.
2
Mark
5
The completed table is shown below. Unshaded boxes are pupil answers.
a
Day
Time
What was happening
Tuesday
6.00 p.m.
Starts tea
1
6.30 p.m.
Finishes tea
1
7.00 p.m.
Food mixed with enzymes in stomach
1
Midnight
Food in small intestine
1
5.00 a.m.
Water starts to be absorbed in large
intestine
1
7.00 a.m.
Toilet to remove water in bladder
1
5.00 p.m.
Toilet to remove solid waste
1
Wednesday
b
The anus.
1
c
His bladder.
1
Total for Help
14
CORE
Question
3
Answer
A diagram showing individual glucose units. Glucose hexagon must be intact
and not joined to another one.
Enzymes
a
b
4
Mark
1
1
i
Stomach and small intestine.
2
ii
Mouth and small intestine.
2
iii
Small intestine.
1
b
Amylase is destroyed by acid in the stomach.
1
c
There are no protein digesting enzymes in the mouth/saliva.
1
i
Cell wall.
1
ii
Must contain cellulose-digesting enzymes/cellulase.
1
a
d
Total for Core
11
EXTENSION
Question
Answer
5
a
Accurate plots; axes labelled; smooth curve drawn; minimum between pH1
and pH2. One mark for each answer.
4
b
pH1/pH2/between pH1 and pH2.
1
c
It is resistant to acid.
1
d
Pepsin works best in acid.
Bile neutralises contents reducing the action of the pepsin
so another enzyme is necessary that works better at neutral/alkaline pH.
1
1
1
a
37 °C/body temperature.
1
b
Can use cooler wash temperature; so less energy needed to heat the water.
2
6
Mark
Total for Extension
12
s
© Harcourt Education Ltd 2004 Catalyst 2
This worksheet may have been altered from the original on the CD-ROM.
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