The annual cost of asthma is estimated to be $56 billion.3. Direct costs accounted for nearly $ 50.1 billion (hospitalizations the single largest portion of direct cost) and indirect costs of $ 5.9 billion (lost earnings due to illness or death).8.he annual cost of asthma is estimated to be $56 billion.3. Direct costs accounted for nearly $ 50.1 billion (hospitalizations the single largest portion of direct cost) and indirect costs of $ 5.9 billion (lost earnings due to illness or death).8.
What is a chromosome? In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. Chromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing.
The long, stringy DNA that makes up genes is spooled within chromosomes inside the nucleus of a cell. (Note that a gene would actually be a much longer stretch of DNA than what is shown here.) DNA consists of two long, twisted chains made up of nucleotides.