Plasmolysis

This lab investigates the affect of sucrose on mitosis in onion root cells. The results of the experiment do not support the hypothesis. As the concentration of sucrose increases, the percent change in root length of the onion decreases. The individual data shows a 44.75% increase in the length of the onion root for the control group (0.0M). This is the highest percent change in onion root length. The solution is likely hypotonic. This means that it contains a higher concentration of water…

When the first bag, which was made of distilled water (10 mL), was fully immersed into distilled water. Its mass almost did not change (Table 1). It increased from 11.9g to 11.3g after 15 minutes, but after it, the mass always kept in 11.3g during the last 45 minutes. For Bag 2, 10mL 10% sucrose immersed into distilled water, its mass increased with the time increased (Table 1). It showed that the weights increased 1.2g in 60 minutes. Also for Bag 3, which contained 30% (10mL) sucrose immersed…

replacing it with the 5% salt solution, the protoplasm shrunk away from its cell wall because the water molecules in the cell moved to a higher concentration (outside the cell). As seen in (fig. 4) it showed that half of the cell is empty because plasmolysis occurred through…

Osmosis is the net movement of water towards higher concentration. In osmosis experiment, water likes to diffuse from an area of low-solute concentration to an area of high-solute concentration. The purpose of the osmosis experiment was to observe the diffusion of solutes and the osmosis of water through a semipermeable membrane, which was dialysis tubing. This experiment was done to examine, if the solution is hypertonic, hypotonic or isotonic. The result of this experiment was that…

There will be more solute outside of the cell than inside, the so the water will move outside of the cell. They will cause the plant cell to undergo plasmolysis, which can lead to plant death. A plant may prevent this from happening by taking in the salt and storing it in a vacuole where it cannot harm the cell. By taking in solute, the plant will also draw in water, because solute is going into the cell…

move from the hypotonic solution, in this case, the inside of the Solanum tuberosum core to the hypertonic solution, which is the outside of the Solanum tuberosum core. Thus, the Solanum tuberosum core will decrease in mass due to the fact that plasmolysis will occur, which will cause the Solanum tuberosum core to shrink in size by the loss of water through osmosis. The greater the concentration of solute the higher the osmolarity. Therefore, the osmolarity of Solanum tuberosum core cannot occur…

The purpose of the experiment was to find the rate of osmosis when the bags, which had water or different percentages of sucrose, were placed in either water or sucrose. The hypothesis of the experiment was that the bags with the different percentages of sucrose put into a beaker of water would have the water flowing into them, the bag with water that was put into a beaker of sucrose solution would have the water flowing out of it, and the bag with water that was put into a beaker of water would…

In a cell, substance can move in and out without expanding energy; which is called passive transport. Think about molecules and ions move in motion in a solution. When a random motion cause a net movement of a substance of high concentration to low concentration is called diffusion. That is where the molecules spread out evenly throughout the area. When you have a difference in the concentration in a distance is called a concentration gradient. Random movement of molecules are called Thermal…

Introduction Most aspects of a cell depend on the fact that atoms and molecules have kinetic energy and are constantly in motion. Kinetic energy causes molecules to bump into each other and move into different places. Diffusion is the random movement of molecules from an area of higher concentration to an area of lower concentration. Cells have selectively permeable membranes that only allow the movement of certain solutes. Diffusion is vital for many of life’s functions in a cell. It allows…

Diffusion Across a Plasma Membrane Lab The purpose of this lab was to learn about the permeability of plasma membranes. In this experiment, dialysis tubing was used to simulate the semipermeable plasma membrane of a caterpillar’s intestine. Cooked starch was prepared and mixed with the enzyme amylase to simulate the mixing of the caterpillar’s saliva with a starch/leaf and then placed in the dialysis tubing to simulate the beginning of the digestive process. The enzyme amylase breaks down…