Monosaccharides, which are commonly known as sugars, are either aldehyde-aldoses or ketoses, depending on whether they possess an aldehyde or ketone functional group, with a general molecular formula [C(H2O)]n, where n = 3–7.
What is general name of monosaccharides?
Monosaccharides and Disaccharides
The monosaccharide is an aldose when the carbonyl group is an aldehyde (RCOH), but is a ketose when the carbonyl group is a ketone (RCO). Depending on the number of carbon atoms, the monosaccharides are known as trioses, tetroses, pentoses, hexoses, etc.
What is the general formula for polysaccharides?
Polysaccharides are polymeric carbohydrates composed of long chains of monosaccharide units joined by glycosidic linkages with a general formula of (C6H10O5)n, 40≤n≤3000.
What is monosaccharide made of?
The monosaccharides include simple sugars and their derivatives. They are the basic carbohydrate units from which more complex compounds are formed. Monosaccharides consist of carbon atoms to which are attached hydrogen atoms, at least one hydroxyl group, and either an aldehyde (RCHO) or ketone (RCOR) group.
How do you number carbons on a monosaccharide?
Carbon atoms are numbered beginning from the reactive end of the molecule, the CHO (aldehyde) or “C” double bonded “O” (carbonyl) end of the molecule. Each carbon atom is then numbered in order through the end of the chain.
How do you name cyclic monosaccharides?
For monosaccharides in their cyclic form, an infix is placed before the ‘-ose’, ‘-ulose’, or ‘n-ulose’ suffix to specify the ring size. The infix is “furan” for a 5-atom ring, “pyran” for 6, “septan” for 7, and so on.
How do you name Aldohexoses?
The eight names of aldohexoses can be grouped into 4 pairs in the same order as the Fiesers’ mnemonic: allose, altrose; glucose, mannose; gulose, idose; galactose, talose.
What is monosaccharide with example?
A monosaccharide is a carbohydrate consisting of one sugar unit. Common examples of simple sugars or monosaccharides are glucose and fructose. Both of these monosaccharides are referred to as hexoses, since they have six carbons.
What is the general test for carbohydrates?
Molisch’s test is a general test for carbohydrates. This test is given by almost all of the carbohydrates. In this test, concentrated sulfuric acid converts the given carbohydrate into furfural or its derivatives, which react with α-naphthol to form a purple coloured product.
Are monosaccharides monomers?
The simplest carbohydrates are called monosaccharides, or simple sugars. They are the building blocks (monomers) for the synthesis of polymers or complex carbohydrates, as will be discussed further in this section. Monosaccharides are classified based on the number of carbons in the molecule.
Is a polymer of monosaccharides?
Carbohydrates are the most abundant biomolecule on Earth. They are a polymer made up of monomers called monosaccharides. These building blocks are simple sugars, e.g., glucose and fructose.
