CAIE A-Level Biology AS 2.2 Carbohydrates and Lipids Questions

Practise CAIE AS Biology 2.2 by linking carbohydrate and lipid structures to their bonds, properties and biological functions.

Exam points

Distinguish α- and β-glucose by C1 hydroxyl orientation; use monomer and polymer terms accurately.
Identify reducing sugars and explain hydrolysis of non-reducing sucrose before testing for its sugars.
Explain how condensation forms glycosidic bonds between monosaccharides and how hydrolysis breaks those bonds.
Relate starch and glycogen branching to compact energy storage, and cellulose chains to strong structural fibres.
Describe triglycerides as glycerol joined to three fatty acids by ester bonds; relate hydrophobicity and fatty-acid composition to storage.
Describe phospholipid hydrophilic heads and hydrophobic tails and how they form membrane bilayers.

[Maximum number: 1]

Which structure shows $\alpha$ -glucose?

[Maximum number: 1]

Which polymers are present in all viruses, all prokaryotes and all eukaryotes?
1 polynucleotides
2 polypeptides
3 polysaccharides

1, 2 and 3

1 and 2 only

1 and 3 only

2 and 3 only

[Maximum number: 1]

Which row shows the monomer and type of bond that form the polymer?

monomer

type of bond

polymer

$\alpha$ -glucose

1,4 only

starch

$\alpha$ -glucose

1,4 and 1,6

amylopectin

$\beta$ -glucose

1,4 only

glycogen

$\beta$ -glucose

1,4 and 1,6

cellulose

All question bank results loaded