For the diffusion and osmosis lab, you gathered data based on changes in the mas
ID: 88883 • Letter: F
Question
For the diffusion and osmosis lab, you gathered data based on changes in the mass of model cells. To design your experiment, you made educated assumptions about what would pass through the dialysis tubing membrane, and what would not. Using the knowledge you gamed during the macromolecules lab, specifically about the reagents that can be used to test for the presence of biological molecules, give examples of how you could have tested these assumptions in relation to movement of starch, glucose and protein (e.g. albumin). These examples do not need to relate to the specific experiment your group did, and need only to address one biological molecule per example.Explanation / Answer
Diffusion is defined as the movement of molecule from the area of higher concentration to an area of lower concentration along a concentration gradient.
In osmosis, the solvent molecules moves from the hypotonic side to hypertonic side across a semi-permeable membrane.
In diffusion, the solute molecules move from the region of higher concentration to the region of lower concentration across a selectively permeable membrane.
Starch, sugar and protein molecules are large in size. Therefore, they cannot diffuse across the membrane. They require special carrier proteins to transport across a biological membrane. This type of transport is called as facilitated diffusion.