The Structure of DNA (The Double Helix) DNA is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).
(June 2012) (Learn how and when to remove this template message) Quarter marathon (QM) refers to either an exact race of a quarter of a marathon, or running for 10â15 kilometers (approx. 6.5â9 miles) without a rest. The former is held in many places around the world. Sisaket, a north-eastern province in Thailand, holds quarter marathons on the third Sunday of December every year.
The official distance of a half marathon is exactly 13.1094 miles. For those who prefer the metric equivalent it is 21.0975 Km. So, as you start to make your plans, the focus should be on being able to run 13 miles or 21 kilometres. The extra little distance will take care of itself.he half marathon is an endurance race as it is over a long distance so stamina and then speed will always determine your best time. The fitter that you can become at running long distances then the better chance you will have of improving times. Age is also important.