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.
DNA only has 5 different atoms - carbon, hydrogen, oxygen, nitrogen and phosphorous. According to one estimation, there are about 204 billion atoms in each DNA . DNA only has 5 different atoms - carbon, hydrogen, oxygen, nitrogen and phosphorous. According to one estimation, there are about 204 billion atoms in each DNA .