Essay on Membranes Cell Membrane and Purple Dark

Cell Membranes and Transport Hands-On Labs, Inc. Version 42-0033-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Exercise 1: Diffusion Observations Data Table 1: Rate of†¦show more content†¦Hypotonic solution. | B. What would happen to a red blood cell placed in distilled water? Why? Distilled water is a hypotonic solution which means in contains no solutes. According to the text (p.72), â€Å"Cells placed in a hypotonic solution plump up rapidly as water rushes into them.† This means that a RBC would eventually pop. C. Create a graph of your experimental data by plotting the percent change in potato mass against sucrose molarity. Label the x-axis as â€Å"Molarity of Sucrose,† and the y-axis as â€Å"% Change in Mass.† D. Determine the molar concentration of the sucrose contained in the potato strips by using the graph created in question C. At the point where the molar concentration of the sucrose in the potato would be isotonic to the sucrose, there would be no net change in the potato mass. On the graph, this is located at the 0% change. Draw a line from this place on the y-axis to intersect the line. From the line draw a line down to the x-axis to find the molarity. Molar concentration of sucrose in potato = .3 M Exercise 3: The Effect of Solvents on Membrane System Observations Data Table 3: Color Intensity from Damaged Beet Cells | TestTube | Solution Treatment | ColorIntensity0 – 10 | Condition of Beet (turgid, flaccid, etc.) | a | 70% Isopropyl alcohol | 10 | Very flacid | b | 35% Isopropyl alcohol | 7 | bendable | c | 17.5% Isopropyl alcohol | 3 | Less firm | d | Distilled Water | 0 | VeryShow MoreRelatedEssay about Cell Membranes and Transport1350 Words   |  6 PagesCell Membranes and Transport Hands-On Labs, Inc. Version 42-0033-00-01 Exercise 1: Diffusion Observations Data Table 1: Rate of diffusion in different temperatures | |  ºC | Minutes | Temperature | InitialTemp. | InitialColor | 5 | 10 | 15 | 20 | 25 | 30 | 60 | Cold | 10 °celsius | clear | clear | clear | clear | clear | clear | light purple | light purple | Ambient | 25 °celsiusRead MoreEssay about Cell Membrane Transport600 Words   |  3 PagesCell Membrane Transport Hands-On Labs, Inc. Version 42-0034-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing thisRead MoreDo Some Particles Move By Diffusion? How Can A Model Be Created?987 Words   |  4 Pagesa model be created to simulate cell membranes and permeability? 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Living cells can function only withinRead MoreEffects of Temperature on Cell Membranes804 Words   |  4 PagesInvestigating the effect of temperature on plant cell membranes The purpose of this activity is: †¢ to practise experimental and investigative skills †¢ to investigate the effect of temperature on cell membrane structures Procedure SAFETY: Always carry scalpels clasped to a tile and with the tip pointing away from you. Beetroot cells contain pigments called betalains that give the tissue its dark purple-red colour. The pigment is contained in the cell vacuole. Investigation a. CollectRead MoreSurface Area and Cell SIze1504 Words   |  7 PagesArea and Cell Size: Introduction Background Information- Iodine is an indicator for starch. When iodine is merged with starch, it turns a dark purple/black color. Cells require nutrients in order to survive. Cells must eliminate waste in order to survive. Description of the Experiment- This experiment was done to provide evidence for why cells are so small. Basically, we pretended that each potato cube used was a single cell and the iodine is the nutrients (food) for the cell. Expectations/HypothesisRead MoreHow Different Temperatures Effect The Cell Membrane Of A Beetroot959 Words   |  4 Pagesdifferent temperatures effect the cell membrane of a beetroot Hypothesis: The more betalain is leaked when the membrane is in higher temperatures Abstract: The experiment which was conducted was to identify the effects of temperature of the beetroot discs. Majority of the pigment from the beetroot is found within the vacuole which is called anthocyanin and each of the vacuole is surrounded by a tonoplast membrane. Externally the cytoplasm is surrounded by the plasma membrane hence the foundation of theRead More2.03 Cell Membranes and Homeostasis Essay895 Words   |  4 PagesTitle: Ms. K Cell Membrane and Homeostasis Experiment Objective(s): The reason for this experiment is to see how starch and iodine affect each other and how a plastic bag works similar to a membrane in certain situations. Introduction: I know prior to doing this experiment that iodine mixed with starch creates a dark color and that most objects, organic and inorganic, naturally experience isotonic reactions. Hypothesis: I think that the potato will absorb more starch than the sweet potato andRead MoreGram, Gram And C. Gram895 Words   |  4 Pagespatients that had died of pneumonia. While examining this lung tissue Gram discovered that certain stains were more favorable and retained by the bacterial cells. It was only a few years later that Gram produced a staining procedure that he divided into two groups. The two groups divided almost all bacteria into what he called Gram positive (purple) and Gram negative (pink). The Gram’s staining procedure is still used today and is the method that forms the basis for identifying bacteria. In order toRead MorePotassium Chloride And The Molecules Through Semipermeable Membrane1298 Words   |  6 PagesMolecules through Semipermeable Membrane Introduction: Diffusion is defined at the net movement of molecular substances from an area of high concentration to an area of low concentration. Beyond that, diffusion can further be divided into two different kinds of net movement of substance to opposing concentration gradients, dialysis and osmosis. Dialysis is defined as the separation of small molecules from large molecules as they pass through a semipermeable membrane (Koerner, 1992). When talking