What is your hypothesis for this experiment diffusion?
What is your hypothesis for this experiment? The greater the concentration gradient, the faster the diffusion rate.
Did glucose diffuse through the membrane?
Glucose cannot move across a cell membrane via simple diffusion because it is simple large and is directly rejected by the hydrophobic tails. Instead it passes across via facilitated diffusion which involves molecules moving through the membrane by passing through channel proteins.
How would you be able to tell if glucose diffused out of the membrane?
Did any glucose diffuse out of the “cell”? Explain how you can tell. Yes. When a sample of the liquid outside the “cell” was mixed with glucose indicator (Benedict Solution) and heated, it changed color to brick-red.
Can glucose and starch diffuse through a membrane?
Starch does not pass through the synthetic selectively permeable membrane because starch molecules are too large to fit through the pores of the dialysis tubing. In contrast, glucose, iodine, and water molecules are small enough to pass through the membrane.
Can glucose diffuse through dialysis tubing?
The dialysis tubing is selectively permeable because substances such as water, glucose, and iodine were able to pass through the tubing but the starch molecule was too large to pass.
What is your hypothesis for this experiment glucose and starch will be able to diffuse across the dialysis tubing membrane?
A. lodine, glucose, and starch will be able to diffuse across the dialysis tubing membrane because they are the same molecular size. Iodine and glucose will be able to diffuse across the dialysis tubing membrane, but not starch due to its molecular size C.
Is glucose permeable to cell membrane?
The selective permeability of biological membranes to small molecules allows the cell to control and maintain its internal composition. Small uncharged polar molecules, such as H2O, also can diffuse through membranes, but larger uncharged polar molecules, such as glucose, cannot.
Why can’t glucose diffuse through the cell membrane?
Although glucose can be more concentrated outside of a cell, it cannot cross the lipid bilayer via simple diffusion because it is both large and polar, and therefore, repelled by the phospholipid membrane.
Can the glucose simply diffuse across the cell membrane Why or why not?