Bio125 Ip3 Essay

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Assignment: BIO125 Phase 1 Lab Report—Cells INSTRUCTIONS: The cell is a unit of life that provides the very foundation of your being. This week, enter the Virtual Lab through the MUSE, and identify the cell’s basic structures and functions. A. Cell membrane List an additional function of this part of the cell: The cell wall is a very tough, flexible and sometimes fairly rigid layer that surrounds some types of cells. It is located outside the cell membrane and provides these cells with structural support, protection and in addition is acting as a filtering mechanism. A major function of the cell wall is to act as a pressure vessel, preventing over-expansion when water enters the cell. ( Holes 2010 pg76.) B. Nuclear envelope What genetic material is found in this part of the cell more than anywhere else in the cell? RNA C. Nucleolus D. Cytoplasm E. Mitochondria F. Lysosomes G. Endoplasmic Reticulum H. Golgi apparatus I. This part of the cell is reponsible for breaking down organic molecules. J. Ribosomes K. centrioles L. Chromatin What function do peroxisomes serve? Peroxisomes contain a variety of enzymes, which primarily function together to rid the cell of toxic substances, and in particular, hydrogen peroxide (a common byproduct of cellular metabolism). These organelles contain enzymes that convert the hydrogen peroxide to water, rendering the potentially toxic substance safe for release back into the cell. Some types of peroxisomes, such as those in liver cells, detoxify alcohol and other harmful compounds by transferring hydrogen from the poisons to molecules of oxygen (a process termed oxidation). Others are more important for their ability to initiate the production of phospholipids, which are typically used in the formation of membranes.( Holes 2010 pg.86) In order to carry out their activities,
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