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What is nutrition? The food contains many nutrients like carbohydrates, fats, proteins, mineral salts, vitamins, and water, so nutrition is the action of organisms to get these nutrients from food. Why nutrition is important for organisms?– Nutrition is essential for organisms because.- All organisms require energy to run all biological functions smoothly. This energy comes from the reduction of food. Food increases the number of organisms, as a result, cells of organisms grow in size and their division increases the size of organisms. New organisms repair the breakdown of cells and tissues. A balanced diet increases the body’s immunity. Nutrients and their classification Many types of nutrients are found in food, which works to produce the energy required for the body, repair the body’s building, and increase the body’s immunity. The following 5 nutrients are found in food Carbohydrates Fats Proteins Water Mineral salts Carbohydrates Carbohydrates are used as a cellular fuel for biological functions, they generate energy for biological functions. They are formed by the mixing of carbon, hydrogen, and oxygen. Among them, the ratio of C, H, and O is 1:2:1 These are two types. Simple Carbohydrate- Simple carbohydrates such as glucose, fructose, and lactose are found in a lot in simple forms like sugarcane beet, dates, etc. Complex Carbohydrate- Starch as a complex carbohydrate is the staple food found in potato, rice, arabica, maize, and sago. Functions of carbohydrates They act as an energy source in all organisms. Energy is released from the fission of glucose in respiration. It is a fuel source in plants in the form of starch and in animals in the form of glycogen. They help in the formation of cell art and connective tissues. They convert into fat and act as accumulated fuel. In DNA, RNA, deoxyribose,e, and ribose sugars are found respectively. DNA is a genetic material and RNA works in protein formation. Glucose and galactose sugars form lactose sugars in the mammary glands. Proteins Protein is a complex organic substance, which is the main substance that produces organisms. Proteins make all types of enzymes. They repair the wear and tear in the body. And also provide energy by oxidation when needed. Carbon, hydrogen, oxygen, nitrogen, together form proteins. A protein molecule consists of several amino acids. Therefore, amino acids are structural or monomeric units of proteins. About 20 types of amino acids participate in the composition of animal organisms. Of these, 10 amino acid cells form themselves and 10 are taken as food. Those which are formed by the cells themselves are called unnecessary amino acids. And the remaining 10 amino acids are called essential. Proteins are obtained from meat, fish, milk, egg, and cheese, etc. from the animals, and from the vegetable world, it is available in lentils, wheat, peanuts, almonds, etc.