Restate Your Hypothesis And Explain The Difference Between Iodine And Starch

1. Restate your hypothesis and discuss if the observed results supported the hypothesis.

Hypothesis: I think that by combining the iodine and the starch the outcome would present itself as a dark color. I also assumed that the potatoes would soak up all the liquids.

2. Identify the control and variables in your experiment.

The manipulated variables are the changes in the development of the potatoes from the materials placed into the substances. The control variables are the pure water substance and the size of the potatoes. Those are the variables of the experiment.

Why do we observe the color of the solution before adding the sandwich bags to each cup?

We observe the color of the solution before adding the sandwich bags to each cup because

The important mechanisms are diffusion, osmosis, and active and passive transport. Through simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration. For polar compounds energy is needed in the form of ATP to enter the cell, this is called active transport.

7. List three criteria cells use to select materials to enter or leave the cell. Then explain the role of each criterion in determining the type of transport a cell will use for different sized molecules. For instance, small molecules move across the membrane by diffusion, given they are moving with the concentration gradient.

The three criteria are diffusion, osmosis, and active transport. Larger molecules move by facilitated diffusion if they are not charged and not lipid soluble, and very large molecules move by endo/exocytosis. Hydrophobic molecules are those that easily pass through the membrane by diffusion. These include those molecules which are soluble in lipids and are usually quite small. Hydrophilic molecules are often larger and have more trouble passing through the membrane. They need a transport protein to help them get through. Large molecules and those with a strong charge need energy, ATP, to help them get through the membrane. This is called active