Question

question 6
part 3: modeling osmosis in a cell

1. which of the three solutions (glucose, starch, and iodine) crossed the membrane? what evidence was collected to support this?

Explanation:

In osmosis - related experiments, glucose and iodine are small - sized molecules that can cross a semi - permeable membrane, while starch is a large polymer and cannot. Evidence for glucose crossing could be a change in glucose concentration on the other side of the membrane detected by a glucose test strip. For iodine, if it crosses, it can react with starch on the other side to form a blue - black complex, indicating its presence on the other side of the membrane.

Answer:

Glucose and iodine can cross the membrane. Evidence for glucose is a change in glucose concentration detected by a test strip. Evidence for iodine is the formation of a blue - black complex when it reacts with starch on the other side of the membrane. Starch does not cross as it is a large molecule.