What Is The Difference Between Starch And Glycogen?

What Is The Difference Between Starch And Glycogen

Many youngsters often do not know what is the difference between starch and glycogen. We know that our body needs carbohydrates to generate the energy to do things. There are several types of polymeric carbohydrates found in living cells such as cellulose, starch, and glycogen. In my today’s article, we will find out what is the major structural difference between starch and glycogen in detail. I have even included the similarities found in these terms. Make sure you also check out the comparison between starch, glycogen, and cellulose too. Are you curious to find out what is the difference between starch and glycogen? Then keep on reading…

What Is The Difference Between Starch And Glycogen?

The difference between starch and glycogen is as follows.

  • Definition:

Glycogen is the polymer of glucose which is the energy storage for fungi and animals. It is made up of from single molecule.

Whereas starch is also the polymer of glucose but it stores energy only for plants. And is made up of two molecules named amylose and amylopectin.

  • Occurrence:

 You can find glycogen stored in liver and muscle cells. It can also be abundantly found in the liver, brain, skeletal muscle, etc.

While starch can be majorly found in cereals, vegetables, roots, tubers, amyloplasts of the plant cells, and other grains.

  • Components:

The glucose components of glycogen are produced when the insulin levels are high. The glucose components of starch can only be produced during photosynthesis.

  • Monomer Chains:

In Glycogen, you will find shorter, branched monomer chains. On the other hand, starch has linear, coiled, branched monomer chains.

  • Molecular Formula:

For Glycogen: (C24H42O21). And for starch: (C6H10O5)n +H2O

  • Molar Mass:

For Glycogen: Variable is not constant. And molar mass for Starch is 666.577 g/mol.

  • Iodine Test:

Glycogen gives a red color with iodine. Whereas starch gives a blue color with iodine.

  • Use

Glycogen cannot be utilized for commercial purposes. However, people widely use starch in the paper and textile manufacturing industries.

Starch Vs Glycogen Vs Cellulose

Here, I have presented a small comparison chart of starch vs cellulose vs glycogen.

 

Characteristics Starch Cellulose Glycogen
Definition It’s the main carbohydrate storage source in plants. It’s the main structural component found in the plant’s cell wall. It’s the main carbohydrate storage source in fungi and animals.
Occurrence Occurs in grains Occurs in fibers Occurs in small granules
Found In Plants Plants Animal and fungi
Monomer Alpha glucose Beta glucose Alpha glucose
Bonds Between Monomers 1,4 glycosidic bonds (in amylose) and 1,4 and 1,6 glycosidic bonds (in amylopectin) occur between monomers 1,4 glycosidic bonds occur between monomers 1,4 and 1,6 glycosidic bonds occur between monomers
Chain’s Nature Amylose is an unbranched, coiled chain; whereas amylopectin is long coiled, branched chains Straight, long, an unbranched chain that forms H-bonds with adjacent chains Short branched chains among which some chains are coiled
Molecular Formula (C6H10O5)n+H2O (C6H10O5)n C24H42O21
Molar Mass Variable molar mass 162.1406 g/mol 666.5777 g/mol
Main Function Serves as a carbohydrate energy store Helps in building cell walls Serves as a carbohydrate energy store
Iodine Test Turns blue Turns purple Turns red

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Similarities Between Glycogen And Starch

In the above section, I have discussed what is the difference between glycogen and starch in detail. There are a few similarities that are often forgotten. Below, I have gathered some similarities between glycogen and starch that you must know.

  • Both of them are made up of the same monomer i.e., monosaccharide alpha glucose.
  • They are used as energy storage.
  • Amylopectin found in starch and glycogen has 1,4 and 1,6 glycosidic bonds.
  • Both starch and glycogen are examples of glucose.
  • Starch, as well as glycogen, are compact molecules.
  • Both of them are often insoluble but can be broken down into glucose molecules for energy.

FAQ

What Is A Difference Between Starch And Glycogen Edgenuity?

While both are polymers of glucose, glycogen is produced by animals and is known as animal starch while starch is produced by plants. 3. Glycogen has a branched structure while starch has both chain and branched components.

Why Is Starch And Glycogen Different?

As a general consequence, starch and glycogen differ in their water solubility. Starch consists of branched water insoluble semi-crystalline amylopectin, and the nearly linear amylose is probably interspersed within the amorphous regions of amylopectin [8,9,10]. Glycogen, in contrast, is mostly watersoluble.

What Is Common Between Glycogen And Starch?

Solution : (a) Glycogen and starch both are complex (carbohydrates) macromolecules made up of glucose units. 

Is Glycogen A Form Of Starch?

Glycogen is the analogue of starch, a glucose polymer that functions as energy storage in plants. It has a structure similar to amylopectin (a component of starch), but is more extensively branched and compact than starch. Both are white powders in their dry state.

Why Glycogen Is Stored Not Starch?

Further, both the polysaccharides are insoluble in water, unlike glucose which shows high water solubility. Thus, starch is a storage product in plants and glycogen in animals. – Glycogen is an easily mobilized storage form of glucose. Almost all of the glucose residues in glycogen are linked by glycosidic bonds.

Conclusion

With the help of my above-written article, you got to know what is the difference between starch and glycogen class 10 in detail. One of the major differences between these two terms is their occurrence. Glycogen is found in adipose tissue, found in animals and fungi. While starch is stored in amyloplasts cells that are found in plants. Also, the structure of starch and glycogen is made up of single and double molecules respectively. But both of them are made up of the same monomer i.e., monosaccharide alpha glucose. Once you understand what is the difference between starch and glycogen, you won’t face any difficulty in remembering these terms!

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