Answers HVA 26-27 IM Biology ALab: Diffusion Across a Semi-permeable Membrane

Lab: Diffusion Across a Semi-permeable Membrane Answers

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Conclusion: Starch has a larger molecule size than glucose. So you can conclude that larger molecules are ✔ lessmoreequally likely than smaller molecules to diffuse across a semipermeable membrane.

✔ less

equally

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Starch molecules are too large to pass through the tubing into the beaker. Which errors could have caused starch to appear in the beaker despite this fact? Check all possible errors.

not washing the outside of the tubing after filling it with starch

reusing droppers for different solutions

adding glucose to the solution in the dialysis tubing

using a beaker that had not been cleaned thoroughly

Based on what you learned in the lab, why does your body need to break down starch into glucose?

Starch contains more energy than glucose.

Starch molecules are too large to diffuse into cells.

Glucose molecules are larger than starch molecules.

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Lab: Diffusion Across a Semi-permeable Membrane Answers

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