Biology 1001A Lecture Notes - Lecture 6: S Phase, Metaphase
1 Oct 2015
School
Department
Course
Professor
Document Summary
55% junk transposons, viruses, dead genes, 10% intron (transcribed dna, but not translated), 10% essential (2% of which is coding, rest is rna, regulating processes, and structure), 25% is still unknown (jelly like) Ebola: its genome is ssrna (single stranded rna, but not an example of a retro virus) 8 genes (19 kilo bases (kb): uses enzyme rna polymerase to replicate, but this enzyme is different than the one present in our body. *all known polymerase enzymes replicates from 3i 5i (on the template) Only extending on the 3i end of the copy. Dna is replicated during s phase: replicated chromosome: C-value (amount of dna) changes, not # chromosomes(n) Ploidy(n) doesn"t change after mitosis ng1 = ng2. Dna structure: double helical structure 2 strands of dh, 2 anti-parallel backbone. Replisomes replicate one strand continuously, one discontinuously. Dna polymerase can"t start replication on its own, depends on a primer to be laid.
