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16 Cards in this Set

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What percent of cell is carbohydrate?

10%

Give 3 roles of carbohydrates?

-energy source


-energy storage


-structural (membrane)

What does alpha glucose look like

Oh on bottom

How does beta glucose differ to alpha?

OH is above carbon 1

State the two types of glycosidic bonds you can get?


1,4 glycosidic bond


and 1, 6 between the branched off CH2OH and carbon 1

What type of bind does amylose have

1,4 glycosidic bond only


And forms a helix 'like structure'

Describe the bonding in the polysaccharide: Amylopectin

For every 1 (1,4) bond there are 4 (1,6) glycosidic bonds. Making the structure very compact with many bends

Why can't the cell store carbohydrates?

It will lower the water potential too much and water will move in by osmosis and cell with burst by lysis

Why do plants and animals use alpha glucose for respiration ?

Plants and animals only have the enzyme which can break down alpha glucose and beta glucose which is present in stuff like cellulose can't be digested

Features of starch

Storage molecule found only in plants in the chloroplasts and consists of Amylopectin and amylose


And is insoluble

Suger for storing energy in animals?

Glycogen-consists of amylose and Amylopectin. Same as starch in plants however has shorter 1,4 bonds and so more compact. And more branches

Bonding in cellulose

B pleated sheats in which the bonding is much linear and straight unbranched.


Many b glucose molecules make microfibrills even macro fibrills by sheets held together by h bonds

How is cellulose adapted for its role?

Beta pleated sheets form macro fibrils with hydrogen bonds making cellulose strong and rigid. Therefore it is ideal for plant cell as added molecules withing the cell wall make it waterproof and turgid.

State 3 feature of the structure of glycogen

Contains Amylopectin and amylose


With shorter 1,4 bonds


Many branches


Therefore making it compact


It is also insolube


No cross links!

The molecule formed by hydrolosis of cellulose

Beta glucose

Name the bond that joins 2 monosaccharides?

1,4 glycosidic bond


1,6 glycosidic bond