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.
The sequence of bases in one section (gene) of a DNA molecule controls the sequence of amino acids in one protein molecule. Each amino acid has its own code of three bases.Every time the same sequence of three bases occurs in the DNA molecule, the same amino acid is added to make up the protein.There are four different bases in DNA (A, T, C and G). Page: 1  1.he sequence of bases in one section (gene) of a DNA molecule controls the sequence of amino acids in one protein molecule. Each amino acid has its own code of three bases.