2007-02-01 15:24:59 · 4 answers · asked by ranjana b 1 in Science & Mathematics ➔ Biology
dna have base but it is acidic in naturebcoz of the phasphate group present in it.
2007-02-01 15:34:12 · answer #1 · answered by Kavitha S 1 · 0⤊ 0⤋
DNA is composes of both acidic and basic groups.
True, the nitrogenous bases are... BASES! (fancy that!), but the sugar-phosphate backbone of DNA, and the way DNA binds to form a double helix, means the overal polymer is actually an acid.
DNA stands for DeoxriboNucleicAcid.
2007-02-01 23:33:30 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living organisms.
The backbone of the DNA strand is made from alternating phosphate and sugar residues. The sugar in DNA is the pentose (five carbon) sugar 2-deoxyribose. The sugars are joined together by phosphate groups that form phosphodiester bonds between the third and fifth carbon atoms in the sugar rings. These asymmetric bonds mean a strand of DNA has a direction. In a double helix the direction of the nucleotides in one strand is opposite to their direction in the other strand. This arrangement of DNA strands is called antiparallel. The asymmetric ends of a strand of DNA bases are referred to as the 5' (five prime) and 3' (three prime) ends. One of the major differences between DNA and RNA is the sugar, with 2-deoxyribose being replaced by the alternative pentose sugar ribose in RNA.
The DNA double helix is held together by hydrogen bonds between the bases attached to the two strands. The four bases found in DNA are adenine (abbreviated A), cytosine (C), guanine (G) and thymine (T). These four bases are shown below and are attached to the sugar/phosphate to form the complete nucleotide, as shown for adenosine monophosphate.
These bases are classified into two ypes, adenine and guanine are fused five- and six-membered heterocyclic compounds called purines, while cytosine and thymine are six-membered rings called pyrimidines. A fifth pyrimidine base, called uracil (U), replaces thymine in RNA and differs from thymine by lacking a methyl group on its ring. Uracil is normally only found in DNA as a breakdown product of cytosine, but a very rare exception to this rule is a bacterial virus called PBS1 that contains uracil in its DNA.
2007-02-01 23:53:27 · answer #3 · answered by razov 2 · 0⤊ 0⤋
part of it is acidic
it codes for amino acids?
2007-02-01 23:34:02 · answer #4 · answered by wesnaw1 5 · 0⤊ 2⤋