Each strand of the double helix is held together by covalent bonds between deoxyribose sugar and phosphate groups (on the 3' and 5' carbons) (making up the backbone). The bases-purines or pyrimidines - (adenine, guanine, cytosine and thymine) are also bonded onto the deoxyribose sugar (on 1' carbon) covalently.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.
Oakland County, Michigan (MI) County population in 2014: 1,237,868 (95% urban, 5% rural); it was 1,194,156 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 264,844. County owner-occupied free and clear houses and condos in 2010: 86,144.
A federal report suggests there might be up to 10,000 gang members in the larger region, but that number includes gang members throughout all of Alameda County, not just in its biggest city. A map of California produced as part of the report by the National Gang Intelligence Center, a branch of the U.S. Department of Justice, shows between 3,500 and 9,999 gang members in the county. About 25 percent of the countyâs residents live in Oakland.