15 million people were self-employed in 2015, or 10.1 percent of all U.S. workers. Self-employment continues to be an important source of jobs in the United States. In 2015, 15.0 million people, or 10.1 percent of total U.S. employment, were self-employed, including those who had incorporated their businesses and those who had not.
DNA helicase is the enzyme that unwinds the DNA double helix by breaking the hydrogen bonds down the center of the strand. It begins at a site called the origin of replication, and it creates a replication fork by separating the two sides of the parental DNA.
The enzyme which can unwind the double helix is called helicase. Prokaryotic polymerases have the helicase activity, but eukaryotic polymerases do not. Unwinding of eukaryotic DNA is carried out by a specific transcription factor. (iii) Synthesis of RNA based on the sequence of the DNA template strand. RNA polymerases use nucleoside triphosphates (NTPs) to construct a RNA strand.