The Membrane Of A Eukaryotic Cell

968 Words Mar 29th, 2016 4 Pages
A eukaryotic cell not only has a plasma membrane as its external boundary, but it also has a variety of membranes that divide its interior into discrete partitions, separating processes and cell mechanisms (National Center for Biotechnology Information, 2012). The complex and varied design of the phospholipid bilayer allows the membrane to serve the variety of specific functions required by different types of cells. Moreover, one of the most significant properties of membranes is selective permeability; permitting the passage and movement of ions and molecules to pass freely through the membrane, but excludes others from doing so (Ek-Vitorin and Burt, 2013). One type of membrane-bound vacuole is found in plant cells, the tonoplast is quite large and contains water (Dee, 2000). Within Beta vulgaris cells, the membrane bound vacuole also contains a red, water soluble pigment, known as betacyanin, that provides the beetroot with its characteristic colour (Nottingham, 2004). As the pigment is water soluble, it remains in the vacuole of the cell, however if the integrity of the membrane is disrupted (through direct chemical damage, channel damage, injury via viruses, etc.) the contents of the vacuole will diffuse out into the surrounding environment (Andrews, Almeida and Corrotte, 2014). Through practical analysis, the effects of various chemicals on membrane permeability in B.vulgaris was observed through the utilization of various concentrations of ethanol – 0%, 35% and 70%…
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