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IGCSE Biology Revision Units 3-5
Test Description: Unit 3 Movement in and out of cells Unit 4 Biological molecules Unit 5 Enzymes
Instructions: Answer all questions to get your test result.
1) Bond that joins amino acids in a protein molecule.
A
hydrogen
B
ionic
C
peptide
D
ester
2) Which is NOT a DNA base pair?
A
A-C
B
G-C
C
C-G
D
A-T
3) Which process relies on water being a solvent?
A
evaporation
B
boiling
C
osmosis
D
transpiration
4) Which is NOT a complex carbohydrate?
A
glucose
B
glycogen
C
cellulose
D
starch
5) What is the composition of 1 molecule of fat?
A
3 molecules of fatty acid, 1 molecule of glycogen
B
3 molecules of glycerol, 1 molecule of fatty acid
C
3 molecules of fatty acid, 1 molecule of glycerol
D
3 molecules of glycogen, 1 molecule of fatty acid
6) Which is NOT needed for osmosis to occur?
A
carrier protein
B
concentration gradient
C
partially permeable membrane
D
water
7) Which is NOT a site of active transport?
A
Bowman's capsule
B
Root hair cell
C
Villi in small intestines
D
Kidney tubules
8) A plant cell placed in distilled water will...
A
be plasmolysed
B
burst
C
be turgid
D
be flaccid
9) Which two structures have a complementary shape?
A
denatured enzyme and substrate
B
enzyme active site and substrate
C
enzyme-substrate complex and substrate
D
enzyme active site and enzyme-substrate complex
10) Which enzyme has an optimum pH of 2?
A
trypsin
B
pepsin
C
lipase
D
amylase
11) Write DIFFUSION in your Asnwer Sheet.
A
diffusion
B
defusion
*select an answer for all questions
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