5D6 Lecture Notes - Lecture 2: Adenine, Cytosine, Uracil
Document Summary
The helix geometry of dna is of b-form (a or z also present). The helix geometry of rna is of a-form. Dna is a double-stranded molecule consisting of a long chain of nucleotides. Rna usually is a single-strand helix consi chains of nucleotides. The bases present in dna are adenine, guanine, cytosine and thymine. The bases present in rna are adenine, gu and uracil. Rna is synthesized from dna on an a. Purine and pyrimidine bases are equal in number. There is no proportionality in between the numbe. Compared with dna, rna is relatively r damage. Hydrogen bonds are formed between complementary nitrogen bases of the opposite strands (a-t, c-g). Dna is found in the nucleus of a cell and in mitochondria. Depending on the type of rna, this mol a cell"s nucleus, its cytoplasm, and its ribosome. The c-h bonds in dna make it fairly stable, plus the body destroys enzymes that would attack dna.
