Biology Notes Unit 1

Carbohydrates * Carbohydrates argon made up of hydrogen, oxygen and carbon. * Carbohydrates arsehole be categorised into three groups: monosaccharides, disaccharides and polysaccharides. * Monosaccharides ar commonly referred to as sugars and are small touchs * Polysaccharides however act as energy breeds, starch and glycogen, and structural components, cellulose and chitin. * The formation of bonds between 2 monosaccharides is called condensation and the breakages of these bonds are called hydrolysis. Monosaccharide- these are the most basic forms of carbohydrates. These can be break down away into two categories. * Pentose- Have five carbon atoms per molecule much(prenominal)(prenominal) as ribose and fructose. * Hexose- Have six carbon atoms per molecule such as alpha and of import glucoses. Disaccharide- A disaccharide is the carbohydrate create when two monosaccharides undergo a condensation reaction. Some exam ples let in * Sucrose -> glucose + fructose * Maltose -> glucose + glucose * Lactose -> galactose + glucose Polysaccharide- Polysaccharides are polymeric carbohydrate structures, formed of repeating units of both monosaccharides or disaccharides conjugated together by glycosidic bonds. stiffen * A polymer of alpha glucose.

* It is use as food store for plants. * Starch is an outstanding storage molecule since it is compact, indissoluble in water, apathetic to chemical reactions and is good hydrolysed when required. Glycogen * A polymer of alpha glucose. * It is utilise as an energy store in an! imals. * Glycogen is an important storage molecule since it is compact, insoluble in water, inert to chemical reactions and is easily hydrolysed when required. Cellulose * A polymer of beta glucose. * It is the constituent of cell walls and can be hydrolysed by ruminant animals by the action of cellulose enzymes. * so it is not branched provided arranged in a matrix which is bounded by hydrogen...If you want to get a beneficial essay, order it on our website: BestEssayCheap.com

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