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 Seafair Half Marathon was added in 2002, and in 2005, the full 26.2 Marathon was added. Participants can run or walk the 21.0975-kilometre (13.1094 mi) and 42.195-kilometre (26.219 mi) courses. If a shorter distance is more appealing, participants can run or walk a 5 km course.