LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Polysaccharides are synthesised in plants by which of the following processes?
A
condensation
B
hydrolysis
C
oxidation
D
reduction
Explanation: 

Detailed explanation-1: -One way of synthesizing a polysaccharide is through a condensation reaction as it involves the joining of sub-units to form a rather condensed compound with the concomitant release or loss of water.

Detailed explanation-2: -Polysaccharides are formed by repeated glycosylation reactions between a glycosyl donor and a glycosyl acceptor.

Detailed explanation-3: -Polysaccharides are formed by the condensation of many glucose units. Glycogen and starch are formed by the condensation of -glucose.

Detailed explanation-4: -Many simple sugars can combine by repeated condensation reactions until a very large molecule is formed. A polysaccharide is a complex carbohydrate polymer formed from the linkage of many monosaccharide monomers.

Detailed explanation-5: -Further condensation reactions result in the formation of polysaccharides. These are giant molecules which, importantly, are too big to escape from the cell. These are broken down by hydrolysis into monosaccharides when energy is needed by the cell. Starch is often produced in plants as a way of storing energy.

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