having or showing a disposition to avoid exertion; slothful: an indolent person. 2. Pathology. causing little or no pain; inactive or relatively benign: an indolent ulcer that is not painful and is slow to heal.
A polynucleotide is a nucleic acid molecule consisting of a long chain of nucleotides. Nucleotides in a polynucleotide molecule are held together by a bond between the phosphate group of one nucleotide and the sugar of a second nucleotide, which is called a phosphodiester bond.
An appropriate nucleotide triphosphate forms a hydrogen bond with an exposed base on the DNA strand. As another nucleotide triphosphate arrives to form a hydrogen bond at the next base, a bond forms between the 3\' OH group of the first nucleotide and the 5\' phosphate group of the new nucleotide. During this process, two phosphate groups are removed.