ANT203H5 Chapter Notes - Chapter 2: Transfer Rna, Intron, Exon
Document Summary
Dna: molecule that provides genetic code for biological structures and also the means to translate this code. 4 bases held together in double helix strucure by sugar and phophate backbone. Long chain of successsive nucelotides base: chemical unit that make up part of dna and specify genetic instructions. Free nucleotides have 3 phosophate groupsl when they incorpaorate itno dna they lose 2. Phosphate is 5 prime end, sugar is 3 prime end (5" and 3") The sugar phosphate backbone has a directionality: 5" to 3 sda. Rna is the only nucleic acid present in some organisms, such as some viruses. In humans > transcription and translation: the sugar. 2. the number of stands ( 1 vs 2: te nitrogenous bases (thymine vs. uracil) Ipmat for meiosis and mitosis interphase: replication of chromosomes prophase: chromosomes come together - centrometeres connect chromatids and chromosome.
