Vitamin is an organic non-protein substance that is required by an organism for normal metabolic function but cannot be synthesized in sufficient quantity by that organism. In other...
DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are nucleic acids. Nucleic acids are molecules comprised of monomers known as nucleotides. These molecules may be relatively small (as in...
Enzymes are proteins that act as biological catalysts. They decrease the amount of energy needed (activation energy) to start a metabolic reaction. Without enzymes, organisms are not being...
Proteins are made up of chains of amino acids bound by bonds called peptide bond. There are some 22 different known amino acids which can compose proteins. There...
Cholesterol refers to a subclass of lipids known as steroids. Cholesterol is also the molecule from which steroid hormones and bile acids are built. Importance of Cholesterol Cholesterol...
Lipids refer to a group of molecules comprising fats, oils, phospholipids, waxes and steroids. All lipids are hydrophobic and don’t dissolve in water. However, they dissolve in organic...
Carbohydrates are essential organic compounds that serve as a primary source of energy for living organisms, including humans. They are made up of carbon, hydrogen, and oxygen atoms...
Inorganic substances made of metallic elements such as iron, sodium, potassium, calcium and magnesium, or of non-metallic elements, such as chlorine and phosphorus. The mineral salts are found...
Water is the basis of life. There are various properties of water that make it basis of life. These include its molecular polarity, high specific heat, its boiling...
Four chemical elements that make up the majority of living biological matter are Carbon, Hydrogen, Oxygen and Nitrogen. Organisms are made of both organic and inorganic substances. Inorganic...
