Quizlet Lab Quiz #2

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  1. Did any glucose molecules diffuse out of the "cell"?: Yes, glucose molecules are small enough.
  2. Did any starch molecules diffuse of the "cell"?: No, the starch molecules are too large.
  3. Glucose Indicator Solution- Glucose: Changed to green then to orange and eventually would become red
  4. Glucose Indicator Solution- Starch: Stayed blue, No change.
  5. Salt Solution: Hypertonic.
  6. Starch Indicator Solution- Glucose: Stay amber, no change.
  7. Starch Indicator Solution- Starch: Changed to black.
  8. What happens to the water content of the red onion cells when they were placed in a salt solution? Explain: When the onion cell was placed in a salt solution the onion cell shriveled up because the water diffused out into the salt solution.
  9. When you add salt solution to the red onion, what happen?Explain: The cells got smaller and shriveled up because the salt solution was hypertonic.
  10. Which substance(s) did not diffuse through the cell membrane?: Starch.
  11. Which substance(s) diffused through the cell membrane?: Iodine and Glucose.
  12. Why were some substances able to pass through the membrane while others were not able to? Explain: The starch Molecules were too large to fit through, but the iodine ang glucose molecules were small enough to fit through the cell membrane.