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WorksheetsIGCSE Biology: Digestive System.
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
How confident are you that you know everything you have been taught about this topic?
(Completely confident = 1, I can't remember anything = 5)
(Completely confident = 1, I can't remember anything = 5)
a)
1
b)
2
c)
3
d)
4
e)
5
2.
Which enzyme catalyses proteins to amino acids?
a)
Amylase
b)
Lipase
c)
Protease
d)
Don't know
3.
Which enzyme catalyses lipids to fatty acids and glycerol?
a)
Amylase
b)
Lipase
c)
Protease
d)
Don't know
4.
What is the substrate that amylase catalyses?
a)
Starch
b)
Protein
c)
Lipids
d)
Don't know
5.
Pancreatic amylase and lipase are released into the...
a)
Pancreas
b)
Liver
c)
Duodenum
d)
Don't know
6.
The protease enzymes that work in the stomach work best at pH...
a)
1
b)
7
c)
11
d)
Don't know
7.
What word describes enzymes that connect work because their active site has been permanently changed?
a)
Destroyed
b)
Denatured
c)
Emaciated
d)
Don't know
8.
Tick all that apply. The villi are designed to...
a)
Increase the surface area for absorption of the products of digestion
b)
To maintain a diffusion gradient between the inside of the small intestine and the blood
c)
Absorb digested lipids into the lymphatic system
d)
To make bile to emulsify lipids
e)
Don't know
9.
In which section of the digestive system are the villi found?
a)
Ileum
b)
Colon
c)
Duodenum
d)
Don't know
10.
Dialysis tubing is selectively permeable. What does this mean?
a)
It will allow large particles/molecules to pass through it, but not small ones.
b)
It will choose which particles/molecules it wants to pass through it.
c)
It will allow only small particles/molecules to pass through it, but not large ones.
d)
Don't know
11.
Amylase is a/an...
a)
Enzyme
b)
Product
c)
Substrate
d)
Don't know
12.
Amylase will catalyse starch and turn it into...
a)
Amino acids
b)
Glucose
c)
Fatty acids and glycerol
d)
Don't know
13.
Iodine is a substance that detects starch. What colour indicates that starch has been detected?
a)
Blue-black
b)
Purple
c)
Bright red
d)
Don't know
14.
In the set-up shown in the diagram, above, after several minutes, a sample of the distilled water is taken and tested with Benedict solution. If the enzyme has worked, the solution will be...
a)
Bright blue because the starch has been turned to glucose
b)
Bright red because the starch has been turned to glucose
c)
Don't know
15.
In another experiment, the water in the beaker is kept at 60℃. After several minutes, a sample of the distilled water is taken and tested with Benedict solution. The colour of the sample will be...
a)
Bright blue because the amylase has turned the starch to glucose
b)
Bright blue because the amylase has been denatured and no glucose has been made
c)
Don't know
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