nucleicacids-ppt.1

D-ribose and D-2-deoxyribose

the only sugars so far found in the nucleic acids from which the sugars have been isolated and identified, and they are assumed to be the sugars universally present in nucleic acids

B-Furanoside ring structure

sugar present in nuclei acids

pyrimidine and purine

2 types of nitrogenous bases

cytosine, thymine, uracil

pyrimidine bases found in nucleic acids are mainly these three

purine basis

It can be considered the product of fusion of a pyrimidine ring with an imidazole ring.

adenine and guanine

the two principal purines found in both DNA and RNA

6-aminopurine

chemically, adenine is what

2-amino-6-oxypurine

chemically, guanine is what

nucleosides

composed of purine or pyrimidine base linked to either D-ribose (in RNA) or D-2-deoxyribose (in DNA)

nucleotide

a nucleoside to which a phosphoric acid group has been attached to the sugar molecule by ‘esterification’ at a definite – OH group and thus has the general composition base – sugar – PO4

DNA

a polymer of deoxyribonucleotides and is found in chromosomes, mitochondria an chloroplasts

histones

basic proteins are called what

histones

are a small family of closely related basic proteins in chromatin.