Carbohydrates

Author: Laura McKinney
Date Of Creation: 3 August 2021
Update Date: 10 May 2024
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Carbohydrates & sugars - biochemistry
Video: Carbohydrates & sugars - biochemistry

Content

The carbohydrates, carbohydrates or carbohydrates are biomolecules made up of carbon, hydrogen and oxygen. Carbohydrates are part of the bodies of living beings fulfilling structural and energy storage functions.

By consuming them in food, offer a readily available source of energy (unlike fats, which also contain energy but require a longer process in the body to obtain it). The process by which a carbohydrate molecule releases its energy is called oxidation.

Each gram of carbohydrate provides 4 kilocalories.

Types of Carbohydrates

According to their structure, carbohydrates are classified into:

  • Monosaccharides: Formed by a single molecule.
  • Disaccharides: Formed by two monosaccharide molecules, joined by a covalent bond (glycosidic bond).
  • Oligosaccharides: Made up of between three and nine monosaccharide molecules. They are usually attached to protein, so they form glycoproteins.
  • Polysaccharides: Formed by chains of ten or more monosaccharides. The chains may or may not be branched. In organisms, they fulfill structure and storage functions.

It can serve you: Examples of Monosaccharides, Disaccharides and Polysaccharides


Examples of monosaccharides

Arabinosa: It is not found free in nature.

Ribose: Found in:

  • Cow liver
  • Pork loin
  • Mushrooms
  • Spinach
  • Broccoli
  • Asparagus
  • Unpasteurized milk

Fructose: Found in:

  • Carob
  • Plums
  • Apples
  • Tamarind
  • Honey
  • Figs
  • Grapefruits
  • Tomatoes
  • Coconut

Glucose: It is essential for good physical and mental functioning. Is found in:

  • Dairy products
  • Nuts
  • Cereals

Galactose: It is not found in its natural state.

Mannose In food, it is found in legumes.

Xylose: It is difficult to digest, it is found in the following foods:

  • Corn
  • Corn husks

Examples of disaccharides

Sucrose: Composed of one molecule of glucose and one of fructose. It is the most abundant disaccharide. In food, it is found in:


  • Fruits
  • Vegetables
  • Sugar
  • Beet
  • Sweet industrial drinks
  • Candies
  • Candies

Lactose: Composed of a galactose molecule and a glucose molecule. In food, it is found in:

  • Milk
  • Yogurt
  • cheese
  • Other dairy

Maltose: Formed by two glucose molecules. It is the least common disaccharide in nature, but it is formed industrially. In food, it is found in:

  • Beer
  • Bread

Cellobiose: Formed by two glucose molecules. It does not exist as such in nature.

Examples of oligosaccharides

Raffinose: It is found in:

  • Beet stalks

Melicitosa: Composed of one molecule of fructose and two of glucose. In food, it is found in:

Examples of polysaccharides

Starch: It is found in plants because it is the way they store monosaccharides. In food, they are found in


  • Banana
  • Pope
  • pumpkin
  • Squash
  • Chickpeas
  • Corn
  • Turnips

Glycogen: It is stored in muscles and liver to give energy. In food it is found in:

  • Flours
  • Bread
  • Rice
  • Pasta
  • Potato
  • Banana
  • Apple
  • Orange
  • Oats
  • Yogurt

Cellulose: It is a structural polysaccharide, it is found in the cell wall mainly of plants, but also of other organisms. It is what in food we call “fiber”:

  • Spinach
  • Lettuce
  • Apples
  • Seeds
  • Whole grains
  • Pineapple

Chitin: Similar in structure to cellulose, but with nitrogen in its molecule, which makes it more resistant. It is used as a food stabilizer.

It can serve you: 20 Examples of Carbohydrates (and their function)


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