BIOLOGY 1A03 Chapter Notes - Chapter 1: Nuclear Localization Sequence, Endomembrane System, Nuclear Membrane

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Rosa Da Silva

Document Summary

Bio 1a03: the structure of the cell; c01; sept 12; dr. da. Almost exclusively unicellular and absence of atmos. photosynthesis and oxygen atoms oxygenic photosynthesis (2700 mill yrs ago) The precambrian (hadean, archaean and proterozoid included origin of life, Impt events: evidence of photosynthetic cells (3500 mill yrs ago) & evidence of ago. Prokaryotic cells- unicellular organisms that lack a nucleus and few to no organelles. Prokaryotic and eukaryotic cells have common ancestors (approx 2 bill years ago; pro is older) Have a nucleotide region, plasmids as dna and pilli etc . Can replicate so quickly because of singular circular chromosomes. Eukaryotic cells- organisms whose cell contains a nucleus and many membrane-bound organelles. Have double membrane bound nucleus = compartment for genetic material from the rest of the cell. *transition to having a compartmental nucleus = sig. change degradation; no cell wall. Animal cell: nucleus, endomembrane system, mitochondria and lysosomal vesicles (enzymatic.