1 Chronic bronchitis: A form of COPD characterized by a chronic productive cough. 2  Emphysema: Lung damage allows air to be trapped in the lungs in this form of COPD. 3  Difficulty blowing air out is its hallmark. 4  Acute bronchitis: A sudden infection of the airways, usually by a virus.
There are only 46 DNA molecules ( 23 pairs) in human somatic cell. There are about 22000 genes and close to 3.2 billion base pairs in total.
Each chromosome contains a single DNA molecule, in addition to proteins, such as histones, which help package, protect, and condense the DNA. A human somatic cell has 23 chromosome pairs, 22 are autosomal, and one is sex-determining. Which means 46 chromosomes in a normal human somatic cell, which means 46 molecules of DNA.