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.
A half-marathon is 13.1 miles, and a standard marathon is 26.2 miles. ANYTHING that is longer than 26.2 miles is considered to be an Ultra-Marathon. They have distances ranging from 50K (31.1 miles) on up to 100 MILES! My first marathon was the 1991 Marine Corps Marathon. 5k run is 5 kilometers (3.11 mi), and a 10k would be 10 Kilometers (6.21 mi). A marathon is 42.195 kilometres (26 miles 385 yards) and a half marathon is 21.0975 kilometers, or 13 7/64 miles, about 13.1 miles.