4.2.4 - Starch & Cellulose: Structure & Function Flashcards
Describe The Structure Of Cellulose
(3 Points)
~ Polymer consisting of long chains of beta glucose molecules, joined together by 1,4 glycosidic bonds.
~ Beta glucose is an isomer, consecutive beta glucose molecules must be rotated 180 degrees to each other to form the 1,4 glycosidic bonds.
~ Due to the inversion of the beta glucose molecules many hydrogen bonds form between the long chains, giving cellulose strength.
Describe The Function Of Cellulose
(4 Points)
~ Main structural component of cell walls due to its strength, is a result of the many hydrogen bonds found between the parallel chains of microfibrils.
~ Its high tensile strength allows it to be stretched without breaking, making it possible to withstand turgor pressure.
~ Cellulose fibres and other molecules found in the cell wall form a matrix, increasing the strength of the cell walls.
~ Providing support to plants.