Difference Between Carbohydrates and Starch: The major difference between carbohydrates and starch is that carbohydrates can exist as both polymeric and non-polymeric compounds whereas starch is a polymeric carbohydrate. Carbohydrates and Starch are organic biomolecules of carbon, hydrogen, and oxygen.
The difference between carbohydrates and starch class 6 is an important topic in biology. This article will cover carbohydrates and glucose and their major differences.
Table of Content
What are Carbohydrates?
Hydrates of carbon are known as Carbohydrates where the general formula is Cx(H2O)y. But this definition does not hold good always. For Example- Rhamnose (C6H12O5) is a carbohydrate but it does not fit in this definition. Similarly, Acetic acid(C2H4O2) is not a carbohydrate.
Modern definition of Carbohydrates: Carbohydrates can be defined as optically active polyhydroxy or mono hydroxy aldehydes or ketones. Carbohydrates are also known as Saccharides. Some of the carbohydrates, which are sweet in taste are also called as sugars. The most common sugar used in our homes is named Sucrose, also known as 'cane sugar', whereas the sugar present in milk is known as Lactose.
Carbohydrates Food List: Bread, Cereals, Fruits, Yogurts
Also Read: Sources Of Carbohydrates – Types, Functions, and Examples
What is Starch?
Starch is basically a type of carbohydrate. It is a polysaccharide that is made up of α-D-Glucose as monosaccharide units. Starch has two components:
- Amylose- It is a linear polymer of α-D-Glucose in which glucose units are bonded using C1-C4 glycosidic linkage(α links). It is water-soluble. It constitutes 15-20% of starch.
- Amylopectin-It is a branched polymer of α-D-Glucose in which glucose units are bonded using C1-C4 glucosidic linkage(α links) and branches are formed using C1-C6 glucosidic linkage. It is water-insoluble due to branching. It constitutes 80-85% of starch.
Starch Food Source: Wheat, Rice, Maize, Potato
Difference Between Carbohydrates and Starch?
The major difference between carbohydrates and starch is given below in tabular form:
Features | Carbohydrates | Starch |
|---|---|---|
Composition | Organic biomolecules made up of C, H, and O | Polysaccharides composed of α-D-Glucose monosaccharide units |
Polymeric Nature | Can exist as polymeric and non-polymeric | Polymeric carbohydrate |
Appearance | Can appear as liquids or solid powders | Appears as white, colourless powders |
Sources | Obtained from food sources like Flour, Bread, Cereals, Potatoes etc | Obtained from staple food sources like Wheat, Potatoes, etc. |
Sweetness | Some carbohydrates are sweet in taste | Starch is not sweet in taste |
Reducing Ability | Can be reducing or non-reducing sugars | Starch is not a sugar |
Conclusion - Difference Between Carbohydrate and Starch
In conclusion, carbohydrates and starch are both vital components of our diet and play essential roles in our bodies and in the natural world. While carbohydrates encompass a broader category of organic molecules providing energy, starch specifically serves as a storage form of energy in plants. Their distinct compositions, appearances, sources, and properties highlight their unique functions. Understanding the difference between carbohydrates and starch helps in making informed dietary choices and appreciating the diverse roles these compounds play in sustaining life.
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