I think that a raisin contains fructose, because fructose is the type of sugar found in fruits. A typical plant cell has a permeable elastic wall, a semipermeable membrane plasma lemma or plasma membrane alone or along with cytoplasm and tonoplast and an osmotically active solution called cell sap contained in the central vacuole.
Part IV Data Questions 1. This is because water moves from inside the vacuole, to the cell since the saline solution is entering the vacuole. Glucose is leaving the bag, we know this because initially there was no change in colour of the Testape in the beaker, but our final data shows, there was glucose present in the beaker.
However, when placed in a hypertonic solution, water moves out of the plant cell, therefore causing the cell to lose its turgor pressure.
Part II Data Questions 1. Steps 2, 3, 5, and 6 were all recorded under high-power objective in the microscope. A plant cell functions as an osmotic apparatus or osmotic system. Presence of a perfectly semipermeable membrane is a must for the operation of osmosis. The confidence level of 0. The type of onion will be insured by using the same onion red onion to collect data, if a different type of onion is used, this would increase chance of error while collecting data.
The percentages recorded in the data table though were not accurate since they were just assumptions because the tools to correctly measure the percent change were not present.
Since more free water molecules are present on the side of dilute solution A, more of them pass through the membrane to enter the solution as compared to the reverse flow.
Another error in the data was that at first many slices of the tunic had to be peeled to finally get a single strand of cells, because every time a slice would be peeled, there would be a double layer of cells, causing it to be hard to see through the microscope.
It is reduction in free energy of water when the latter comes to form thin surface layers adsorbed over colloidal particles. The loss of water is first from cytoplasm and then central vacuole. The independent variables here were the different concentrations of salt water, and the dependent variables were the size of the cell membrane, affected by any osmosis that may have taken place.
The final part of this lab was observing osmosis under real life conditions with actual cells. Water potential describes the tendency of water moving to another area. Three raisins of roughly the same size were taken from a box of raisins, and each were placed in a different environment.
Part II of the lab involved using different substances on opposite sides of a membrane, and observing which way the water would diffuse. It is bathed in a water medium or lies in contact with other cells having water. Types of Osmosis 3.
In case of strong electrolytes the osmotic potential may be almost double or triple as compared to nonelectrolytes. As a result, the protoplast is reduced in size.
Diffusion is the process by which molecules of a substance move from areas of higher concentration of that substance to areas of lower concentration. Osmotic Relations of Plant Cells. The net movement of water In a plant cell can be described using the two terms, turgor pressure and plasmolysis.
Loss of water produces a negative hydrostatic pressure or tension. If the external solution does not cause any further exosmosis, the value of its solute potential will be equal or isotonic to solute potential of the cell.
It can be said that the raisin in the water is hypotonic compared to the water since it has less water, and the raisin is hypertonic compared to the syrup since it has more water. The comparison of the concentration of a substance on one side of the membrane as opposed to the other is called the concentration gradient.
The cell wall, being elastic, presses the protoplast with an equal and opposite force. The random movement of molecules from an area of high concentration to low is called iffusion. If they differ, the solution with a higher concentration of solutes is hypertonic with respect to the other; the solution with lower concentration is hypotonic.Osmosis Data Analysis Essay reduce.
Plant cells always have a strong cell wall surrounding them. When the take up water by osmosis they start to swell, but the cell wall stops them from bursting.
When they are put in dilute solutions, plant cells turn out to be “turgid” (swollen and hard). When the pressure inside the cell increases; No. ADVERTISEMENTS: In this essay we will discuss about: 1. Definition of Osmosis 2. Types of Osmosis 3. Osmotic Pressure 4.
Factors 5. Importance 6. Osmotic Relations of Plant Cells. Contents: Essay on the Definition of Osmosis Essay on the Types of Osmosis Essay on the Osmotic Pressure (O.P.) Essay on the Factors of Osmosis Essay [ ].
Lab Report: Diffusion and Osmosis. Print Reference this. Published: 23rd March, Last Calculation of Water Potential from Experimental Data Analysis: Part A: Diffusion and Osmosis. If you are the original writer of this essay and no longer wish to have the essay published on the UK Essays website then please click on the link below.
Data analysis tends to be an ongoing and iterative (nonlinear) process in qualitative research. The term we use to describe this process is interim analysis (i.e., the cyclical process of collecting and analyzing data during a single research study). This lab was performed to understand the process of diffusion and osmosis.
First off, to fully comprehend the point of this lab, one has to be on familiar terms with the workings of diffusion and osmosis. Calculation of Water Potential from Experimental Data.
Analysis: Part A: Diffusion and Osmosis. If you are the original writer of. Data analysis tends to be an ongoing and iterative (nonlinear) process in qualitative research.
The term we use to describe this process is interim analysis (i.e., the cyclical process of collecting and analyzing data during a single research study).Download