User:UnderEducatedGeezer/sandbox/DNA
DNA is a double-helix biomolecule which carries genetic instructions. In it's stretched-out configuration, it looks like a twisted ladder. Each rail of it is comprised of nucleotides which are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. The nucleotides are connected across the rails by their base pairs to form the rungs. Sequences of these base pair rungs make up the genes.
DNA COMMPONENTS
NUCLEOBASES → → BASE PAIRS → → NUCLEOSIDES → → NUCLEOTIDES
- NUCLEOBASES - nitrogenous bases
- BASE PAIRS - linked bases, as specific pairs
- adenine–thymine
- guanine–cytosine
- (adenine–uracil)
- NUCLEOSIDES - a nucleobase and a five-carbon sugar
- NUCLEOTIDES - nucleoside and a phosphate. three subunit molecules: a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and a phosphate group consisting of one to three phosphates. Nucleotides are most often referred to by the names of their nucleobases.