IGCSE Biology Revision Units 3-5 Question Preview (ID: 46301)


Unit 3 Movement In And Out Of Cells Unit 4 Biological Molecules Unit 5 Enzymes. TEACHERS: click here for quick copy question ID numbers.

Which two structures have a complementary shape?
a) denatured enzyme and substrate
b) enzyme active site and substrate
c) enzyme active site and enzyme-substrate complex
d) enzyme-substrate complex and substrate

A plant cell placed in distilled water will...
a) be flaccid
b) be plasmolysed
c) be turgid
d) burst

Which is NOT needed for osmosis to occur?
a) carrier protein
b) concentration gradient
c) partially permeable membrane
d) water

Which is NOT a site of active transport?
a) Bowman's capsule
b) Kidney tubules
c) Root hair cell
d) Villi in small intestines

What is the composition of 1 molecule of fat?
a) 3 molecules of fatty acid, 1 molecule of glycerol
b) 3 molecules of glycerol, 1 molecule of fatty acid
c) 3 molecules of fatty acid, 1 molecule of glycogen
d) 3 molecules of glycogen, 1 molecule of fatty acid

Which is NOT a complex carbohydrate?
a) cellulose
b) glucose
c) glycogen
d) starch

Which is NOT a DNA base pair?
a) A-C
b) A-T
c) C-G
d) G-C

Which process relies on water being a solvent?
a) boiling
b) evaporation
c) osmosis
d) transpiration

Bond that joins amino acids in a protein molecule.
a) ester
b) hydrogen
c) ionic
d) peptide

Which enzyme has an optimum pH of 2?
a) amylase
b) lipase
c) pepsin
d) trypsin

Write DIFFUSION in your Asnwer Sheet.
a) diffusion
b) defusion
c)
d)

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