Noun. 1. surface tension-a phenomenon at the surface of a liquid caused by intermolecular forces. physical phenomenon-a natural phenomenon involving the physical properties of matter and energy.
The DNA polymerases are enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two identical DNA strands from a single original DNA molecule.he 3'-5' exonuclease activity of the enzyme allows the incorrect base pair to be excised (this activity is known as proofreading). Following base excision, the polymerase can re-insert the correct base and replication can continue forwards.
Key Concepts: Bacterial DNA polymerase I enzymes are multidomain proteins with separate polymerisation, proofreading and 5â²â3â² exonuclease functions. They perform a vital function in bacteria by carrying out DNA repair and some aspects of chromosomal replication.Polymerases incorporate one nucleotide at a time to the 3â² end of the primer DNA strand in a templateâdirected manner.hey perform a vital function in bacteria by carrying out DNA repair and some aspects of chromosomal replication. Polymerases incorporate one nucleotide at a time to the 3â² end of the primer DNA strand in a templateâdirected manner.