IB Biology SL B1.1.5 Polysaccharides As Energy Storage Questions

Practise IB Biology SL B1.1.5 by linking alpha-glucose branching and insolubility to starch and glycogen energy storage and mobilisation.

Exam points

Describe starch as amylose and amylopectin made from alpha-glucose units, distinguishing unbranched and branched structure.
Explain how glycogen and starch provide compact, insoluble energy stores in animals and plants.
Explain how stored polysaccharides are hydrolysed to mobilise glucose for cellular respiration.

[Maximum number: 3]

Describe the structure and function of starch in plants.

Section	Label	Answer point
Structure	a	starch is a polysaccharide/is composed of glucose molecules
Structure	b	contains amylose which is a linear/helical molecule
Structure	c	contains amylopectin which is a branched molecule
Function	d	storage of glucose/energy in plants
Function	e	storage form that does not draw water

All question bank results loaded