Why Is The Digestion Of Starch To Glucose Necessary

Why Is The Digestion Of Starch To Glucose Necessary – Starch is a type of carbohydrate, also referred to as a complex carbohydrate since it is made up of long chains of sugar molecules. Starchy foods include peas, corn, potatoes, beans, pasta, rice and grains. Starches are a more concentrated source of carbohydrates and calories than fruits, nonstarchy vegetables and dairy, but many of them are excellent sources of fiber, vitamins, minerals and phytonutrients.

Why Is The Digestion Of Starch To Glucose Necessary

Why Is The Digestion Of Starch To Glucose Necessary

Why Is The Digestion Of Starch To Glucose Necessary – glucose is one of the body’s preferred sources of fuel in the form of carbohydrates. People get glucose from bread, fruits, vegetables, and dairy products. You need food to create the energy that helps keep you alive. Molecules of starch, the major energy-reserve carbohydrate of plants, consist of thousands of linear glucose units. Another major compound composed of glucose is cellulose, which is also linear. Dextrose is the molecule d-glucose.

An enzyme that recognizes one starch molecule won’t necessarily recognize different starch molecules. Similarly, the transport molecules that move nutrients from our digestive system and into our circulatory system are also very specific with respect to what they will transport. With so many different shapes and lengths of starch molecules possible, it would require a large number of different transporters and enzymes to work with them effectively. This would be very inefficient. Finally, glucose is a relatively small molecule, and this makes it much easier to manipulate than a large, unwieldy starch molecule.

In general, our metabolisms have evolved to work with certain basic units, putting these units together into polymers, and breaking these polymers apart. For carbohydrates, the basic sugar unit is usually glucose. The basic protein unit is the amino acid. The basic genetic unit is the nucleotide.

 

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