HORTICULTURE

HORTICULTURE SCIENCE

PLANT BIO CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Sugars which differs from each other only around single carbon atom is called epimer.
A
both
B
true
C
False
D
none
Explanation: 

Detailed explanation-1: -Explanation: Mostly common sugars are similar, the basic difference among them is at a single carbon atom i.e. differing by stereochemistry, these types of sugars which differ from each other only at a single carbon atom are called epimers. For e.g. D-glucose and D-mannose differ only at second carbon position. 5.

Detailed explanation-2: -Epimers. Two sugars differing in configuration at a single asymmetric carbon atom are known as epimers. Glucose and mannose are C2 epimers, ribose and xylose are C3 epimers, and gulose and galactose are also C3 epimers (Figure 3).

Detailed explanation-3: -Epimers are carbohydrates which vary in one position for the placement of the-OH group. The best examples are for D-glucose and D-galactose. Both monosaccharides are D-sugars, meaning that the-OH group on carbon-5 of these hexoses is located on the right in Fischer Projection.

Detailed explanation-4: -Mannose is a C-2 epimer of glucose and a sugar monomer of the aldohexose series of carbohydrates. Mannose is important in human metabolism, particularly in the proper glycosylation of native proteins.

Detailed explanation-5: -The stereoisomers which differ in the configuration at only one chiral carbon atom are known as epimers whereas those which differ in configuration at acetal or hemiacetal carbon are known as anomers.

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