Biology 1001A Lecture Notes - Lecture 1: Dna Replication, Nucleoid, Archaea
Document Summary
Dna synthesis: once the chromosomes are replicated and separated to opposite ends of the cell, the membrane pinches together between them and 2 daughter cells are formed. Most bacteria and archaea use dna as hereditary information and store it in a circular chromosome of double-stranded dna. Chromosomes are compacted in a central region called the nucleoid. When resources are abundant, a prokaryotic cell can just begin to divide and replicate as soon as dna replication is complete, and chromosomes are separated. Mitosis in prokaryotes are much simpler than in eukaryotes as they only have a single chromosome. Dna molecules are combined with proteins that stabilize dna, assist in packaging dna during cell division and influence the expression of individual genes: each chromosome is composed of one of these molecules. A genome is all the dna sequence in one copy of an organism"s chromosome: n represents one copy of all of an organism"s nuclear chromosome (i. e. one.
