DNA or nucleic acid is a polymer of nucleotides. A nucleotide consists of 3 molecules: a 5-carbon sugar (pentose) either deoxyribose (in DNA) or ribose (in RNA) a phosphate attached at the #5 carbon of the sugar an organic or nitrogenous base – a nitrogen containing ring structure – attached at the #1 carbon of…
Water is a unique substance essential to life. It is the most abundant molecule in any cell. Human body is 55-78% composed of water. 1. Polar Molecule – A polar covalent bond is formed between the oxygen and hydrogen. The oxygen atom is slightly negative and the hydrogen is slightly positive due to unequal sharing…
The atom is the basic unit of matter. Atoms bond to one another to form compounds. Bonds are formed by the sharing or transfer of electrons present in the atoms. Bonds between Atoms: Chemical Bonds Covalent compounds – formed by the EQUAL sharing of electrons between atoms – electrically neutral molecules (no “+” or “-“…
