Lab 1 Diffusion And Osmosis Pre-lab Quiz

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Lab 1 Diffusion And Osmosis Pre-lab Quiz - Quiz

Lab 1 diffusion and osmosis pre-lab quiz for coach wimpey and coach johnson.


Questions and Answers
  • 1. 

    What is the purpose of IKI in the lab?

    • A.

      To indicate the presence of glucose

    • B.

      To react with the dialysis tubing

    • C.

      To indicate the presence of starch

    • D.

      To color the solution red

    Correct Answer
    C. To indicate the presence of starch
    Explanation
    IKI (iodine-potassium iodide) is commonly used in laboratory experiments to indicate the presence of starch. When IKI comes into contact with starch, it forms a dark blue-black color. This reaction is due to the formation of a complex between iodine and the helical structure of starch molecules. Therefore, the purpose of IKI in the lab is to detect the presence of starch by observing the color change in the solution.

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  • 2. 

    In this lab the dialysis tubing represents

    • A.

      Mitochondria

    • B.

      Plasma Membrane

    • C.

      Chloroplast

    • D.

      Nucleus

    Correct Answer
    B. Plasma Membrane
    Explanation
    The dialysis tubing represents the plasma membrane. The plasma membrane is a selectively permeable barrier that surrounds the cell and regulates the movement of substances in and out of the cell. Dialysis tubing is a semi-permeable membrane that allows the passage of small molecules, similar to the plasma membrane. Therefore, using dialysis tubing in the lab can simulate the functions and properties of the plasma membrane.

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  • 3. 

    Which of the following is true of sucrose?

    • A.

      It is non-polar

    • B.

      It is table sugar

    • C.

      It is the same as starch

    • D.

      It will not dissolve in water

    Correct Answer
    C. It is the same as starch
  • 4. 

    Which molecule is larger, glucose or IKI?

    • A.

      IKI

    • B.

      Glucose

    • C.

      Can't tell

    Correct Answer
    B. Glucose
    Explanation
    Glucose is larger than IKI. Glucose is a monosaccharide with a molecular formula of C6H12O6, while IKI (iodine potassium iodide) is a compound consisting of iodine and potassium iodide. Glucose has a larger molecular structure with six carbon atoms, while IKI is a smaller compound. Therefore, glucose is the larger molecule compared to IKI.

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  • 5. 

    A 0.2 M solution of sucrose will have

    • A.

      .2 molecules of sucrose per milliliter of water

    • B.

      .2 moles of sucrose per milliliter of water

    • C.

      .2 moles of sucrose per L of water

    • D.

      .2 moles of sucrose per L of solution

    Correct Answer
    D. .2 moles of sucrose per L of solution
    Explanation
    A 0.2 M solution of sucrose means that there are 0.2 moles of sucrose dissolved in 1 liter of solution. The concentration of the sucrose is given in moles per liter of solution, not moles per liter of water. Therefore, the correct answer is ".2 moles of sucrose per L of solution."

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  • 6. 

    Which solution list below is most hypertonic relative to distilled water?

    • A.

      0.0 M sucrose

    • B.

      0.2 M sucrose

    • C.

      0.4 M sucrose

    • D.

      0.6 M sucrose

    Correct Answer
    D. 0.6 M sucrose
    Explanation
    The solution that is most hypertonic relative to distilled water is 0.6 M sucrose. Hypertonic solutions have a higher solute concentration compared to the surrounding solution. In this case, the sucrose concentration increases from 0.0 M to 0.6 M, indicating a higher solute concentration. Therefore, 0.6 M sucrose is the most hypertonic solution among the given options.

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  • 7. 

    How is the presence of glucose detected?

    • A.

      Glucose test strip

    • B.

      IKI

    • C.

      Change in mass

    • D.

      All of the above

    Correct Answer
    A. Glucose test strip
    Explanation
    The presence of glucose is detected using a glucose test strip. This strip contains a chemical reagent that reacts with glucose in a sample, producing a color change. By comparing the color of the strip with a color chart, the concentration of glucose can be determined. The other options, IKI (iodine-potassium iodide) and change in mass, are not commonly used methods for detecting glucose. Therefore, the correct answer is the glucose test strip.

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  • 8. 

    In the lab how can you tell whether the dialysis bags gained or lost water?

    • A.

      By the change in color

    • B.

      By the change in volume

    • C.

      By the change in mass

    • D.

      You cannot tell

    Correct Answer
    C. By the change in mass
    Explanation
    In the lab, the most reliable way to determine whether the dialysis bags gained or lost water is by measuring the change in mass. This is because water has a known density, and any change in mass would indicate a corresponding change in the amount of water present in the dialysis bags. Changes in color or volume may not necessarily correlate with changes in water content, making them less accurate indicators.

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  • 9. 

    Osmosis is

    • A.

      The diffusion of sucrose

    • B.

      The diffusion of IKI

    • C.

      The diffusion of glucose

    • D.

      The diffusion of water

    Correct Answer
    D. The diffusion of water
    Explanation
    Osmosis is the process of diffusion of water molecules across a selectively permeable membrane. It occurs when there is a difference in the concentration of solute molecules on either side of the membrane. Water moves from an area of lower solute concentration to an area of higher solute concentration in order to equalize the concentration on both sides. Therefore, the correct answer is "The diffusion of water."

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  • 10. 

    How does water move?

    • A.

      Always from higher potential to lower potential

    • B.

      Always from lower potential to higher potential

    • C.

      Movement varies depending on mass

    • D.

      Cannot tell until you do the lab

    Correct Answer
    A. Always from higher potential to lower potential
    Explanation
    Water moves from higher potential to lower potential due to the principle of diffusion. This means that water molecules will naturally move from an area of higher concentration (higher potential) to an area of lower concentration (lower potential) until equilibrium is reached. This movement occurs through a process called osmosis, where water molecules pass through a semi-permeable membrane to equalize the concentration on both sides. Therefore, water will always move from a region of higher potential to a region of lower potential.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 08, 2008
    Quiz Created by
    Born2play4ever
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