Cell Membrane and Diffusion Experiments

The video tutorial covers diffusion through a membrane, focusing on a state lab experiment. It explains how to create a model cell using dialysis tubing and test for the diffusion of glucose and starch using indicator solutions. The tutorial also demonstrates the effect of salt solution on red onion cells, teaching proper techniques for creating a wet mount slide. The video emphasizes understanding diffusion, using indicator solutions, and observing cellular changes.

What is the primary purpose of using dialysis tubing in the diffusion lab?

• To act as a catalyst in the reaction

• To simulate a cell membrane

• To provide nutrients to the solution

• To measure the temperature of the solution

Why does the inside of the model cell turn black during the starch and iodine experiment?

• The water changes color due to temperature

• The iodine diffuses into the cell and reacts with starch

• The starch diffuses out of the cell

• The glucose reacts with iodine

In the test tube experiment, what does a blue color indicate when using Benedict's solution?

• Presence of starch

• Absence of starch

• Absence of glucose

• Presence of glucose

What is the purpose of using iodine in the test tube experiment?

• To test for glucose

• To test for starch

• To test for lipids

• To test for protein

What does the change in color to brick red indicate in the glucose diffusion experiment?

• Presence of glucose

• Absence of glucose

• Absence of iodine

• Presence of starch

What is the role of Benedict's solution in the glucose diffusion experiment?

• To act as a buffer

• To change the temperature of the solution

• To indicate the presence of glucose

• To test for the presence of starch

What effect does a salt solution have on red onion cells?

• It causes the cells to expand

• It causes the cells to shrink

• It changes the color of the cells

• It has no effect on the cells

What is the purpose of creating a wet mount slide in the red onion cell experiment?

• To stain the specimen

• To observe the specimen under a microscope

• To dry the specimen

• To heat the specimen

What happens to the cytoplasm of red onion cells when exposed to a salt solution?

• It becomes more visible

• It shrinks

• It expands

• It changes color

What is the final step in the red onion cell experiment after adding salt solution?

• Heating the slide

• Adding distilled water

• Adding more salt

• Staining the cells