Lab 2 David Halfhill.docx - BIO 101 Essentials of Biology...

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List substances present in Cup 1 at the start of the experiment? Cup 1 BIO 101 Essentials of Biology Lab 2 Experiment: Cell Membrane Transport Exercise 3 – Diffusion across a membrane (worth 30 points) 1. (2points) a. List the substances present in Cup 1 at the start of the experiment: 150 ml of distilled water, 20 drops of IKI solution. b. List the substances present in the dialysis tubing at the start of the experiment: 2ml of Starch solution, 2ml of 20% glucose, 4ml of distilled water. 2. Complete Data Table 1 in the space below. (2 points) Data Table 1: Changes During Dialysis Color of Solution Before Dialysis (Tubing Not Yet Placed in Cup 1) After Dialysis (Before Benedict’s Test) IKI Solution in Cup 1 Wiskey color/light orange Light orange Solution in Dialysis Tubing Clear solution Dark blue List of substances present in dialysis tubing at start of the experiment? Dialysis Tubing 1
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3. What does the IKI solution detect? Hint: check your lab manual or do an internet search. (1 point) The presence of starch 4. What color change did you observe in the solution inside the dialysis tubing?
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  • Spring '14
  • BarbaraE.Davis
  • Biology

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