About 70% of a human body’s energy requirements should be met by

Explanation

The correct answer is Carbohydrates. Concept: Food is our basic need. It nourishes our bodies and maintains our health. It gives us the energy that is required for every action. The various food items that we consume constitute our diet. Diet may be defined as the total amount of different variety of food items consumed by a person during a day. A healthy diet should consist of simple, natural and/or well-cooked foods which promote health and protect us from diseases. It should keep our organ systems well functioning. There is a delicate relationship between what we eat, how much we eat and what will happen to our health if we overeat or do not eat properly. Explanation: The energy requirement is the amount of food energy that is needed for balancing energy expenditure in order to maintain body size, body composition and a level of necessary and desirable physical activity consistent with long-term good health. The Dietary Guidelines recommends that carbohydrates should comprise 70% of total caloriesand a limit on added sugars to no more than 10% of total calories for a healthy diet. Carbohydrate : When we play, climb at an altitude, run, or work hard we need energy. This energy can be filled with taking glucose. Glucose is a type of carbohydrate by which we get energy instantly. Carbohydrate is the main source of energy and strength . it consists of carbon, hydrogen, and oxygen elements. These elements are stored in our body in the form of glycogen. It decomposes by the process of respiration and releases energy as needed. Additional Information Proteins The protein is a Polypeptide bond which is a sequence of amino acids. The end product of protein digestion is amino acids. Proteins are digested and broken down into amino acids with the help of enzymes. Amino acids are very small, they are able to be absorbed through the small intestine lining and into your bloodstream. Nucleic acids A nucleic acid is an organic compound such as DNA or RNA that is built of small units called nucleotides. Many nucleotides bind together to form a chain called a polynucleotide. The nucleic acid DNA (deoxyribonucleic acid) consists of two polynucleotide chains . The nucleic acid RNA (ribonucleic acid) consists of just one polynucleotide chain . The products of digestion of nucleic acid are pentose sugars,nitrogenous bases and phosphate ions. These products are transported by carriers across the villus epitheliumand then enters into bloodstreams. Lipids A lipid is an organic compound such as fat or oil . Organisms use lipids to store energy. Lipids consist of repeating units called fatty acids. The products of digestion of Lipids are Fatty acidand glycerol.