Thursday, March 14, 2019

An Investigation to Show How Water Temperature and Alcohol Concentratio

An Investigation to collection How Water Temperature and Alcohol Concentration Affect Membrane Permeability exact The aim of the experiment is to show the cells membrane permeableness is affected by being placed into different temperaturesof water. Also the military unit of placing beetroot in to differentconcentrations of alcohol.Beetroot cells contain a rubicund skim, which leaks out of the cells iftheir membranes are damaged or altered. Cell membranes are make up ofa bilayer of phospholipids, which also contains proteins. Which eitherfloat around or are fixed. Some are found in the inner or outer layerand rough span the whole membrane saccharide chains attach themselvesto the external membrane forming glycoproteins and glycolipids. Italso contains cholesterol. We will be able to tell how damaged theyare because we will guarantee a deeper coloured red in the water from wheremore of the red sap has leaked out of the cells.Method A fresh cylinder of beetroot was taken and u sing a scalpel anyskin was removed. Care should be taken when a scalpel is used to bring downobjects into small pieces. It was and then cut into 40 discs using thescalpel. adjoining the discs were placed in a boiling thermionic tube and rinsedrepeatedly in till the water ran clear. Then two sets of tail fin boilingtubes were set up into racks. Then using a mensuration cylinder measured10cm of tap water was placed in flipper of the boiling tubes of the setthat would be testing the effect of different temperatures. These werethen left in the different water baths to adjust to the temperature.The other quint had 10cm different concentrations of alcohol rangingfrom 25%-100%. There was also one with 10cm of water. Next four discsof the beetroot were placed into each boil... down to 24%. I presuppose this an anomalousresult as after researching this 100% alcohol is used to preserve foodso the light transmission division should of gone up but this neededto be repeated.I thi nk the main source of error in these two experiments that couldhave decrease the accuracy was that there was some variation in thethickness of some of the beetroot discs. I think this is hard toimprove as this is more often than not down to human error of not being able tocut beetroot exactly into 1-2mm discs. The experiment needed to berepeated to see more clearly if there were any anomalous results.Works Cited go on Sciences Biology 1, Mary Jones, Richard Fosberyand Dennis TaylorAS guru Biology, John Graham and Anthony LewisBiology Principles and Processes, Michael Roberts, Michael Reiss and aggrandize

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