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Monosaccharides : Definition and Examples MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

Quick Facts

  • 13 Questions around this concept.

Solve by difficulty

The glycosidic bond is not seen in

The carbon of -COR is numbered as

The structure of glucose would show which of the following at C-1?

Which group consists of only hexose sugars?

Which sugars are hexose and aldose both?

Grape sugar is ________

Monosaccharides are 

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Which of the following groups of monosaccharides are consumed primarily in the body?

Which of the following sugars have the same number of carbon as present in glucose?

 

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Concepts Covered - 1

Monosaccharides

Monosaccharides

  • These are the simple sugars that cannot be broken down through the hydrolysis reaction.
  • They do not have any covalent bond.
  • These are the monomers that would condense via the glycosidic bond (a type of covalent bond) to form polymers of carbohydrates.
  • They are represented by the formula (CH2O)n.
  • The smallest molecules usually considered to be monosaccharides are those with n = 3.
  • Monosaccharides can be categorized according to their value of 'n' as shown below:    
n Category
3

Triose

4

Tetrose

5

Pentose

6

Hexose

7

Heptose

8

Octose
 

  • Monosaccharides are also classified on the basis of the carbonyl - aldehyde (-CHO) or ketose (-COR) group.
  • Glyceraldehyde is a triose with an aldehyde group.
  • Dihydroxyacetone is a triose with a ketose group.
  • Glucose is a hexose with an aldehyde group.
  • Fructose is a hexose with a ketone group.

                      

Classification of Monosaccharides according to the number of carbon in the

                           skeleton and type of carbonyl group

 

TIP: Carbons in a monosaccharide are numbered such that the aldehyde group is carbon number one or the ketone group is carbon number two.

Some examples of monosaccharides:

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Monosaccharides

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