Carbohydrates perform two main functions: construction and energy. For example, cellulose forms the walls of plant cells; the complex polysaccharide chitin is the main structural component of the external skeleton of arthropods. Chitin also performs the construction function in fungi. Carbohydrates play the role of the main source of energy in the cell. During the oxidation of 1 g of carbohydrates, 17.6 kJ of energy is released. Starch in plants and glycogen in animals, deposited in the cells, serves as an energy reserve.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.