The DNA double helix is held together by hydrogen bonds and the nucleotide bases Adenine, Guanine, Cytosine, or Thymine. Check out the source I provided. There's a great diagram of the double helix.Source(s): http://www.ba-education.demon.co.uk/for/...eport Abuse. Hydrogen bonds hold the two helices together to form a double helix. I also remember somethign called base stacking, which if i recall was hydrogen bonding of the same strand, which promoted the helical nature and enforced rigidity of the structure.
Norfolk, Nebraska. Norfolk (/ËnÉÉrfÉÉrk/ or /ËnÉÉrfoÊk/) is a city in Madison County, Nebraska, United States, 113 miles northwest of Omaha and 83 miles west of Sioux City at the intersection of U.S. Routes 81 and 275. The population was 24,210 at the 2010 census,[5] making it the ninth-largest city in Nebraska.
The 5th largest county in England, Norfolk is a low lying area in the East Anglia region, it has a population of around 850,000 and has borders with Suffolk, Lincolnshire and Cambridgeshire, it also borders the Wash and the North Sea. The major roads coming into the county of Norfolk are the A47, A10, A11, A140 and A12.Norfolk Towns : Norwich-County city of Norfolk, Norwich was the second largest city in England in the eleventh century. Norwich Norfolk Map.Heacham-A large village on The Wash, located to the south of Hunstanton, Heacham has a couple of fine sandy beaches and a number of caravan parks which are popular with holidaymakers ....he major roads coming into the county of Norfolk are the A47, A10, A11, A140 and A12. Norfolk Towns : Norwich-County city of Norfolk, Norwich was the second largest city in England in the eleventh century. Norwich Norfolk Map.