Biological Molecules practice quesitons for A level

Practice question for A level Biology

1. Biology Homework: Biological Molecules

Name______________________________________________
Q2. Define the following terms clearly:
a) Monomer b) Polymer c) Macromolecule d) Monosaccharide e) Disaccharide f)
Polysaccharide

2. Biology Homework: Biological Molecules

Q1. α-glucose and β-glucose
a) Draw the ring structure of α-glucose and β-glucose. (Show the difference in the position of
the –OH group on carbon 1).
b) Describe in words how α-glucose differs from β-glucose.


Q3. Covalent Bonds in Polymers
State the role of covalent bonds in joining smaller molecules together to form polymers.

3. Biology Homework: Biological Molecules

Q4. Reducing and Non-reducing Sugars
State which of the following are reducing sugars and which are non-reducing sugars:
• Glucose
• Fructose
• Maltose
• Sucrose


Q5. Glycosidic Bonds
a) Describe how a glycosidic bond is formed during a condensation reaction.
b) Explain this process with reference to:
• The formation of disaccharides (e.g. sucrose).
• The formation of polysaccharides (e.g. starch, glycogen, cellulose)