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The effect of temperature on the cell membranes of Beetroot cells. Free essay! Download now

Home > A Level > Biology > The effect of temperature on the cell membranes of Beetroot cells.

The effect of temperature on the cell membranes of Beetroot cells.

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Downloads to date: N/A | Words: 2791 | Submitted: 05-Apr-2011
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The effect of temperature on the cell membranes of Beetroot cells. essay previewThe effect of temperature on the cell membranes of Beetroot cells. essay previewThe effect of temperature on the cell membranes of Beetroot cells. essay preview

Description

To investigate whether temperature will damage and denature the permeability of plasma membrane.

Preview

TITLE
The effect of temperature on the cell membranes of Beetroot cells.

OBJECTIVES
To investigate whether temperature will damage and denature the permeability of plasma membrane.

HYPOTHESIS
An increase in temperature will damage and denature the permeability of plasma membrane.

INTRODUCTIONS

Beetroot
Thebeet(Beta vulgaris) is a plant in theChenopodiaceae family. It is best known in its numerous cultivated varieties, the most well known of which is probably the red or purple root vegetable known as thebeetrootor garden beet. However, other cultivated varieties include the leaf vegetableschardandspinach beet, as well as the root vegetablessugar beet, which is important in the production oftable sugar, andmangelwurzel, which is afoddercrop. Threesubspeciesare typically recognised. All cultivated varieties fall into thesubspeciesBeta vulgarissubsp.vulgaris, whileBeta vulgarissubsp.maritima, commonly known as thesea beet, is the wild ancestor of these and is found throughout the Mediterranean, the Atlantic coast of Europe, theNear East, andIndia. A second wild subspecies,Beta vulgarissubsp.adanensis, occurs fromGreecetoSyria.
Beetroot cells like any other eukaryotic cells have many types of cell organelle present. Some of these organelles are bounded by a single membrane, e.g. lysosomes, Golgi apparatus, vacuoles; some are bounded by two membranes (an envelope), e.g. nucleus, mitochondrion. Beetroot appears as a dark red/ purple colour and this is caused by the betalain pigment, which is contained within the vacuole of beetroot cells. In order for the betalain to leave the cell it needs to pass through 2 different membranes; the membrane bounding the vacuole and the membrane enclosing the cell. Betalain pigments, named after the Red beet (Beta vulgaris). They replace anthocyanins in plants of the order Caryophyllales (Cacti, beets & Co., bougainvillaea, phytolacca, large-flowered purslane etc and also in some fungi such as fly agaric). Two categories of betalains exist and each have distinct color and chemical properties. Betacyanins convey a blue-violent to reddish-purple coloring, are a source of antioxidants and are susceptible to color changes depending on their environment. Betaxanthins are yellow or orange, do not function as antioxidants and are relatively stable. Betalains are found exclusively within one plant order, which includes beets, prickly pear cactus, chard and amaranth. Betanin is a specific betacyanin and the most prominent pigment in the red beet root where it contributes between 75% - 90% of the total visible color.


Plasma membrane
Plasma membraneis abiological membranethat separates theinteriorof all cells from theoutside environment. The cell membrane isselectively-permeableto ions and organic molecules and controls the movement of substances in and out of cells. It consists of thephospholipid bilayerwith embeddedproteins, which are involved in a variety of cellular processes such ascell adhesion,ion conductivityandcell signaling. The plasma membrane also serves as the attachment surface for the extracellularglycocalyxandcell walland intracellularcytoskeleton.

Plasma membrane proteins function in several different ways. Many of the proteins play a role in the selective transport of certain ...

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