osmosis questions..?

Question

1. Obtain a short piece of dialysis tubing (12-15cm), and soften it by soaking it in deionised water.

2. Fold one end over and tie it tightly with a piece of thin string or strong thread.

3. Fill the bag with solution A, a liquid "meal" containing 25% glucose, 0.5% egg albumin, and 1% starch.

4. Fold over the top, squeeze out all the air, and tie tightly. The bag should be limp.

5. Place the bag in a small beaker and add enough of solution B (iodine-KI solution) to cover it. Let it stand for an hour or so while you go on.

Answer the following questions, remembering that the bag is permeable to glucose, iodine, and water but not to starch or protein.
a) Which solution was hypertonic (A or B)?
b) Which solution gained water (A or B)?
c) Which solution has a higher osmotic pressure (A or B)?
d) Which substance inside the membrane reacted with iodine?
e) Which substance(s) moved out through the membrane?
f) Which test could you use to test for the presence glucose outside?
g) If you swallowed some of solution A, which substance(s) could be absorbed directly by the cells of your gut, assuming that they have the same permeability as the dialysis tubing?
h) Which substance(s) would have to be futher digested?
i) If your dialysis bag was flaccid or limp at the beginning of the experiment, at the end was it (very flaccid, flaccid, fully turgid)?

one more question..

j) Which of the following statements best describes the situation at equilibrium if you let the system stand for a long time?
(*1) No molecules move across the membrane.

(*2) All molecules cross the membrane equally often in either direction.

(*3) Molecules to which the membrane is permeable cross equally often in either direction.

(*4) Only water molecules cross the membrane equally often in either direction.

bumpz.....

can anyone please answer it T__T

Answer 1

I have all the right answers to all the questions. sorry to the guy above, but some of his answers are wrong. he's only a freshman though, and it's better than what i would have done as a freshman

a. A
b. B
c. A
d. Starch
e. Glucose
f. Benedict's test
g. Glucose
h. Albumin and starch
i. Very flaccid
j. (*3) equilibrium refers to everything, not just water.

Answer 2

Are you in 9th grade biology? Because I think I did exp. early in the year. Im not going to answer all the questions for you because I dont know all of them, but here are some answers:
a. A
b. B
c. A
i. It would be
j. I think its *4?