Glucose and Starch Movement in Cells

The video tutorial explores the movement of starch and glucose through cell membranes using model cells. The experiment tests whether these substances can pass through the cell membrane by using iodine for starch and Benedict's solution for glucose. Results show that starch does not pass through the membrane, while glucose does, indicating selective permeability of the cell membrane.

What is the primary goal of the experiment introduced in the first section?

• To measure the rate of diffusion in different solutions.

• To test the effect of temperature on cell permeability.

• To observe if food substances can move in and out of the cell.

• To determine if starch can be converted into glucose.

What color change indicates the presence of starch when iodine is used?

• Red

• Blue

• Green

• Black

In the first model, what was the result of the starch test?

• Starch remained inside the cell.

• Starch moved outside the cell.

• Starch dissolved in water.

• Starch turned into glucose.

What was inside the cell in the second model setup?

• Water

• Starch

• Iodine

• Glucose

What conclusion was drawn from the second model regarding starch movement?

• Starch dissolved in the cell.

• Starch turned into glucose.

• Starch remained outside the cell.

• Starch moved into the cell.

What solution is used to test for the presence of glucose?

• Iodine

• Salt solution

• Benedict's solution

• Vinegar

What color change indicates the presence of glucose when using Benedict's solution?

• Blue to yellow/orange

• Red to green

• Yellow to blue

• Black to white

In the third model, what was the initial content inside the cell?

• Iodine

• Water

• Starch

• Glucose

What was observed about glucose movement in the third model?

• Glucose turned into starch.

• Glucose moved outside the cell.

• Glucose remained inside the cell.

• Glucose did not move.

What was the final conclusion about the movement of starch and glucose through the cell membrane?

• Neither starch nor glucose can pass through the cell membrane.

• Only glucose can pass through the cell membrane.

• Only starch can pass through the cell membrane.

• Both starch and glucose can pass through the cell membrane.