DNA molecules are composed of repeating subunits called nucleotides. A nucleotide is made of three parts: a nucleobase, a certain type of sugar (deoxyribose in the case of DNA â¦ nucleotides), and one or more phosphate groups.There are four different nucleobases found in DNA: adenine, cytosine, guanine, and thymine.NA molecules are composed of repeating subunits called nucleotides. A nucleotide is made of three parts: a nucleobase, a certain type of sugar (deoxyribose in the case of DNA â¦ nucleotides), and one or more phosphate groups. There are four different nucleobases found in DNA: adenine, cytosine, guanine, and thymine.
According to multiple studies, the Hummer H2 has an average mileage between 9 and 15 miles per gallon. Due to the potential repercussions of such extremely low gas mileage on the environment, the Hummer brand has long been a popular target for environmentalists.
However, while many typical cars had 20 to 25 MPG ratings, SUVs during the same period often had ratings of less than 20 or 15 MPG. As of the early 21st century, many cars and small SUVs have advertised a combined gas mileage rating of 20 to 25 MPG or more, with even higher figures for highway MPG.