BIOL 112 Lecture Notes - Lecture 4: Dna, Pentose, Nitrogenous Base

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Frieder Schoeck

Document Summary

Their roles include: dna (deoxyribonucleic acids) which has the information to our genetic makeup, dna is transcribed into rna (ribonucleic acid) which is translated into proteins, nucleotides also signal molecules and energy transducers. A nucleotide has a nitrogenous base, a pentose sugar, and phosphate groups. [make references to the picture to the right when looking for c#] The group is normally joined to c5 hydroxyl of the ribose or deoxyribose. Pyrimidine (ring only) includes: thymine, cytosine, uracil* only present in rna and replaces. Purine (ring + penta) includes: adenine, guanine. A phosphodiester linkage is required to connect the. 5" nucleotides: the phosphate of the second nucleotide condenses with the oh of the 3" carbon of the first nucleotide. Polymerization occurs in 5" to 3" direction! Important scientists who contributed to the discovery of dna. Rosalind franklin: collected x-ray diffraction pattern of dna.