IB Biology SL B1.1.5 Polysaccharides As Energy Storage Questions

Practise IB Biology SL B1.1.5 by comparing starch in plants with glycogen in animals and fungi, and linking compactness, insolubility and easy hydrolysis to glucose storage.

Exam points

Compare starch, stored as amylose and amylopectin, with more highly branched glycogen.
Explain how compactness, insolubility and easy hydrolysis make both polysaccharides effective glucose stores.

[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

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IB Biology SL B1.1.5 Polysaccharides As Energy Storage Questions question 1