BIOLOGY
POLYSACCHARIDES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Linear-chain monosaccharides Simple monosaccharides have a linear and unbranched carbon skeleton with one carbonyl (C=O) functional group, and one hydroxyl (OH) group on each of the remaining carbon atoms.
Detailed explanation-2: -In monosaccharides the joining of one hydroxyl group (–C–OH) to the carbonyl carbon (–C O) produces a cyclic structure.
Detailed explanation-3: -Cyclic hemiacetal formation. In a monosaccharide, the carbonyl (C=O) and alcohol group (OH) exist within the same molecule, so they can react forming a cyclic hemiacetal (or hemiketal, in the case of ketoses). The resulting structure will be an intramolecular cyclic hemiacetal.
Detailed explanation-4: -Summary. Monosaccharides that contain five or more carbons atoms form cyclic structures in aqueous solution. Two cyclic stereoisomers can form from each straight-chain monosaccharide; these are known as anomers.