L12 DNA Structures and Function

Condensaaon reacaons release water and form covalent

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: There are four chemically dis6nct nucleo6des in DNA Deoxyribose and phosphate are constant in each base, but 4 nucleoAdes are disAnguishable by the specific nitrogenous base Pyrimidines: -aromatic heterocyclic, single ring BIOLOGY 1A03 Cellular and Molecular Biology Fig 4.1c Purines: -2 rings, a pyrimidine fused with an imidazole ring Nucleo6des polymerize using phosphodiester bonds. CondensaAon reacAons release water and form covalent phosphodiester bonds between two nucleoAdes. BIOLOGY 1A03 Cellular and Molecular Biology Fig 4.2 New nucleo6des are added to the 3’ end. NOTE: ORIGINAL FIGURE REPLACED HERE!!! BIOLOGY 1A03 Cellular and Molecular Biology Fig 14.3 b Purines pair with pyrimidines. 1900’s BIOLOGY 1A03 Cellular and Molecular Biology Molecular pairing between purine and pyrimidines would mean consistent spacing between 2 phosphoribose backbones… Rosalind Franklin’s X-ray data support the helical arrangement Fig 4.6 Two strands of DNA form...
View Full Document

Ask a homework question - tutors are online