Asthma is a common long term inflammatory disease of the airways of the lungs. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and bronchospasm. Symptoms include episodes of wheezing, coughing, chest tightness, and shortness of breath. These episodes may occur a few times a day or a few times per week. Depending on the person they may become worse at night or with exercise. Asthma is thought to be caused by a combination of genetic and environmental factors.
DNA polymerase III (not DNA polymerase) is an enzyme that works in association with other enzymes during the replication of a DNA molecule. DNA replication begins when the enz â¦ yme, known as helicase unwinds a DNA strand.Helicase unwinds a DNA strand, thus, in the process, separating the two DNA templates. polymerase is an enzyme that catalyzes the conversion of free nucleotides into a single strand.   DNA polymerase differs from RNA polymerase in two major respects:   * â¦ Like all enzymes, DNA polymerase is substrate-specific.
Helicase, made of six proteins arranged in a ring shape, unwinds the DNA double helix into two individual strands. Single-strand binding proteins, or SSBs, are tetramers that coat the single-stranded DNA.This prevents the DNA strands from reannealing to form double-stranded DNA.Primase is an RNA polymerase that synthesizes the short RNA primers needed to start the strand replication process. DNA polymerase is a hand-shaped enzyme that strings nucleotides together to form a DNA strand.his prevents the DNA strands from reannealing to form double-stranded DNA. Primase is an RNA polymerase that synthesizes the short RNA primers needed to start the strand replication process. DNA polymerase is a hand-shaped enzyme that strings nucleotides together to form a DNA strand.