Freebase(0.00 / 0 votes)Rate this definition: Bollard. A bollard is a short vertical post. Originally it meant a post used on a ship or a quay, principally for mooring. The word now also describes a variety of structures to control or direct road traffic, such as posts arranged in a line to obstruct the passage of motor vehicles.
Which of the following events occurs directly after a DNA molecule is unzipped? A. Mismatched nucleotide bases are identified and replaced. B. Free-floating nucleotides pair up with exposed bases.hich of the following events occurs directly after a DNA molecule is unzipped? A. Mismatched nucleotide bases are identified and replaced. B. Free-floating nucleotides pair up with exposed bases.
Making the world better, one answer at a time. The double helix of the DNA unwinds. Then, the enzyme helicase 'unzips' the DNA by breaking the hydrogen bonds. Then, the enzyme DNA Polymerase pairs each of the two strands with the correct nitrogenous bases.The top strand is called the 'leading strand' and the bottom strand is called the 'lagging strand.' Then the enzyme ligase glues together the different fragments of the lagging strand of DNA.Now we have two exact replications of DNA, each with 46 chromosomes called daughter cells.he top strand is called the 'leading strand' and the bottom strand is called the 'lagging strand.' Then the enzyme ligase glues together the different fragments of the lagging strand of DNA. Now we have two exact replications of DNA, each with 46 chromosomes called daughter cells.