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Lecture 1: "Introduction To Cells"

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Western University
Biochemistry 2280A
Mel Usselman

Biochemistry Lecture No1 Introduction To Cells thThursday September 6 2012 Types Of OrganismsDifferences There are two main orders of life on Earth Prokarya meaning before nucleus and Eukarya meaning true nucleus Prokaryotes are organisms that fall under the Prokarya classification and a notable example of such life forms are bacteriaEukaryotes are organisms that fall under the Eukarya classification and notable examples of such life forms are plants animals and fungi It is important to understand that genome complexity does not necessarily correlate with the complexity of the organism Eg Onion plants have a greater genome size for expression than do human beings However there is a wide variation of the base pair sequences examined from organism to organism The major difference between eukaryotes and prokaryotes is the fact that eukaryotes possess a nucleosome whereas prokaryotes do not Prokaryotes have thick rigid cell walls while eukaryotes can either have cell walls in the case of plants and fungi or not in the case of mammalian speciesOther notable differences include eukaryotic possession of intracellular organelles like the Endoplasmic Reticulum and Golgi
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