Essay about Prokaryotic Microbes

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The purpose of this lab was to determine the size of prokaryotic microbes in comparison to eukaryotic cells. Students used oil immersion microscopy to magnify the microbes and compare their size to that of a eukaryotic cheek cell. The results of this lab allowed students to compare and contrast eukaryotic and prokaryotic cell size, which is a necessary skill when working with microbiology based labs. Microbiology is the study of microscopic organisms, also known as microbes. Microorganisms include bacteria, fungi, protists, and autotrophic organisms. Viruses, although not an organism, are often included in the study of microbes. In this lab, three types of bacteria; bacillus, spirillum, and coccus; were observed and compared
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Oil immersion microscope lens increases the resolution of a microscope. As early as 1812, Sir David Brewster “suggested that the front element of a microscope’s objective lens could be immersed in the liquid in which the object of study was mounted” (Magner, 148). In 1840, Giovanni Amici advanced the immersion technique and introduced oil immersion, in which the objective lens touches a drop of oil placed on the cover slip. This technique was championed with the goal of minimizing light aberrations to produce a more focused view.
Understanding the differences between prokaryotic and eukaryotic cells is the underlying concept in comparing the size of the prokaryotic bacteria and the eukaryotic cheek cell. The differing structure and containments of prokaryotic and eukaryotic cells help to explain their contrasting size. Prokaryotic cells do not contain membrane-bound organelles, such as the nucleus. In addition to having different organelles, the cell structure varies between prokaryotes and eukaryotes. Not all eukaryotic cells are surrounded by a cell wall; however, if they are, the cell wall contains no peptidoglycan. Contrastingly, all prokaryotic cells have cell walls; all cells walls of bacteria are formed of peptidoglycan, in which the structure of this layer determines the major functions of the cell. The structure of DNA also differs between the two cell classifications.

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