Name: Vitamins and Health
Uploaded: 2019-07-19
Duration: 6 min 14 s
Description: This video discusses the chemical nature of vitamins, their importance and their different properties. Moreover, learn about the various diseases caused due...

Question

How glucose is synthesized? Discuss the ring structure of D-Glucose.

Accepted Answer

From starch:

Glucose is produced commonly by the hydrolysis of starch with dilute hydrochloric acid at high temperature under pressure.

${(C_{6} H_{10} O_{5})}_{n} + n H_{2} O \to_{393 K, 2 - 3 atm}^{HCl} n C_{6} H_{10} O_{6} Starch Glucose$

From sucrose:

Sucrose i.e. cane sugar on acid hydrolysis produces an equal amount of glucose and fructose.

$C_{12} H_{22} O_{11} + H_{2} O \to_{∆}^{H^{+}} C_{6} H_{12} O_{6} + C_{6} H_{12} O_{6} Sucrose Glucose Fructose$

Ring structure of glucose:

Glucose has two types of projection that is open chain structure called Fisher projection and the ring structure called Haworth projection.

Glucose has six carbon atoms and an aldehyde group is an aldohexose. Here, the $- OH$ group of fifth carbon of glucose added to the aldehyde group results in the formation of cyclic hemiacetal that is pyranose structure. This projection is called Haworth projection for glucose.

How glucose is synthesized? Discuss the ring structure of D-Glucose.

Important Questions on Biomolecules

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