IB Biology SL B1.1.6 Cellulose Structure and Function Questions

Practise IB Biology SL B1.1.6 by tracing beta-glucose 1-4 chains, hydrogen-bonded microfibrils and cellulose support of plant cell walls.

Exam points

Describe cellulose as unbranched beta-glucose chains joined by 1-4 glycosidic bonds.
Explain how hydrogen bonding between cellulose chains forms strong microfibrils.
Relate cellulose structure to plant cell-wall strength and support against turgor pressure.

[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 ]

All question bank results loaded

a	unbranched/straight chain of glucose molecules OR unbranched/straight-chain polysaccharide;
b	formed of beta glucose;
c	formed by condensation reactions/glycosidic bonds OR 1, 4 linkage;
d	hydrogen bonds form between cellulose chains;
e	form microfibrils;