IB Biology SL B1.1.6 Cellulose Structure and Function Question Bank

Practise IB Biology SL B1.1.6 by linking beta-glucose chains to strong plant cell walls and explaining why humans lack cellulose-digesting enzymes.

Exam points

Describe beta-glucose chains, glycosidic bonds and linear cellulose structure from diagrams.
Explain how cellulose fibres strengthen plant cell walls and why humans cannot digest them.

[Maximum number: 5]

(a)

Label the area where cellulose is found in the micrograph of a plant cell.

[ 1 ]

(b)

Cellulose is the most abundant organic polymer on Earth. Describe the structure of cellulose.

[ 3 ]

(c)

Outline one reason for humans being unable to digest cellulose.

[ 1 ]

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