Membranes What is the affect of temperature on beetroot membranes? Hypothesis: It is hypothesized that as the temperature increases‚ the deeper red the beetroot water will be. At higher temperatures the proteins in the beetroot plasma membrane will denature‚ leaving holes in the membrane and allowing the red pigment in the cell sap to seep out into the water around it. Variables: Dependent-The dependent variable is the absorbency of the beetroot water after being soak at either 50‚60‚70‚ or 80
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An experiment to determine percentage of cell viability by using serial dilutions and a haemocytometer Aim The aim of this experiment was to determine accuracy of the cell count and how valid the result of the experiment will be. Materials and Methods Refer to Scientific and Laboratory skills practical booklet. (Pg. 10-Pg. 12) Results Table one: Raw data (Viable cells) Tube Counts (4x4 grid) Counts (4x4 grid) Counts (4x4 grid) Counts (4x4 grid) Average Count A 34 31
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sugar the mass of beetroot decreased. This happened because water moved from the inside of the beetroot‚ where there was a high water potential into the sugar solution‚ which had a lower water potential. In the other four beakers where the concentration of sugar solution was less‚ the mass of the beetroot increased. This happened because water moved from the dilute sugar solution where there was a high water potential‚ into the beetroot. The percentage increase in the mass of beetroot increased as the
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Investigating Effects of duration of heating on permeability of beetroot cell membrane Introduction: Cell membranes contain many different types of molecules which have different roles in the overall structure of the membrane. Phospholipids form a bilayer‚ which is the basic structure of the membrane. Their non-polar tails form a barrier to most water soluble substances. Membrane proteins serves as channels for transport of metabolites‚ some act as enzymes or carriers‚ while some are receptors
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permeability of beetroot cell membranes. Prediction: By exposing a membrane to a solvent‚ ethanol‚ it will increase its permeability. So the higher the concentration of the solvent‚ the more permeable the membrane will be. But if the concentration of the ethanol is beyond a certain limit‚ it may break down the cell membrane to the point where there is in fact no overall effect as the ethanol would disturb the lipids in the membrane. Therefore‚ more of the red pigment in the beetroot would leak
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Cell phone is the most popular technological product nowadays. It is used by almost people off all ages. It seems to be very useful. In fact‚ for every plus‚ there is minus. In my opinion‚ although cell phone shows us many advantages‚ it also brings us some disadvantages. For one thing‚ cell phone really makes our life easier because of the following reasons. First‚ it is very convenient. It helps us contact with people at anywhere over the world in a fastest way. People use it to connect with others
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2011 Driving While Using a Cell Phone In today’s society‚ technology has become more advanced. Our society has become dependent on technology‚ specially the cell phone. We use our cell phones to talk to anyone‚ anywhere and at any time. Generally‚ we use our cell phones in the cars‚ while we are running errands or conduction business from one place to another place. Which has lead to numerous accidents on the American highways‚ so the nation has begun to question should cell phones be used while
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handphone. I believed that using cell phones during class will cause distraction. It doesn’t matter to students that they are not allowed to use their cell phones while they are in class‚ they do it anyway. They often send text messages to each other and this can distract them from their education‚ as well as distract the person they are texting‚ which is likely to be another student. Many people call this the new way of passing notes. Besides that‚ Another drawback of allowing cell phones is that they
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1 Practical report: Determination of concentration using a standard curve Introduction Spectrophotometer is an instrument that confirms the measurement of specified wavelength of light that passes through medium. The measurement of light absorbance by a solution is also done with spectrophometer. Absorption spectrum Spectrometers are mainly and widely functional in identifying the components of solutions that helps determine the components’ concentrations. Compounds are experimentally identified
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CHEMISTRY PRACTICALS CLASS-XII EXPERIMENT No. 1 AIM – (a) To prepare 100ml of M/20 solution of oxalic acid. (b)Using this calculate the molarity and strength of the given KMnO4 solution. APPARATUS AND CHEMICALS REQUIRED- Oxalic acid‚ weighing bottle‚ weight box‚ volumetric flask‚ funnel‚ distilled water‚ chemical balance‚ beakers‚ conical flask‚ funnel‚ burette‚ pipette‚ clamp stand‚ tile‚ dilute H2SO4‚ KMnO4 solution. THEORY- (a) Oxalic
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