General Biology (BI131 01)
Structure and function
In this lab the structures of various cells were viewed through a compound microscope. The bacteria in yogurt was viewed a long with a slice of potato, and a thin skin of red onion. The potato was dyed with iodine while the red onion was dyed with methane blue. The students had to assemble the first three slides. Two more slides were provided these are the yeast and protozoa cells. Those two are also viewed with the same microscope.
Cytology is the study of cellular structure and function. “The cell nucleus is a complex and highly dynamic environment with many functionally specialized regions of substructure that form and maintain themselves in the absence of membranes (Korie E. Handwerger),” Prokaryotic cells do not contain a membrane-bound nucleus or any other membrane bound organelles. Bacteria is a type of prokaryotic cell they have many functions that are important. Such as being fermentation agents, playing a huge role in human digestive systems and serving as decomposers. This means that bacteria are a very important type of cell that life is very well dependent on.
There is another type of cell call eukaryotic cells, unlike prokaryotic cells these have a membrane bound nucleus. Eukaryotic cells are more complex with multiple internal organelles bound by a double membrane. “The purpose of the nucleus is to sequester the DNA-related functions of the big eukaryotic cell into a smaller chamber, for the purpose of increased efficiency (Prokaryotic and Eukaryotic Cells)”. There is some similarities between the two cells, for example both have a large amount of ribosomes in them. Lastly both of the cells have DNA that carries all the saved instructions for operating it.
3 Microscope slides...
"Trends in Cell Biology - Sub nuclear Organelles: New Insights into Form and Function." Trends in Cell Biology - Sub nuclear Organelles: New Insights into Form and Function. N.P., n.d. Web. 24 Sept. 2013.
"Prokaryotic Cells." Prokaryotic Cells. N.p., n.d. Web. 24 Sept. 2013.
"Prokaryotic and Eukaryotic Cells." Prokaryotic and Eukaryotic Cells. N.p., n.d. Web. 24 Sept. 2013.
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