Biology 0610 · IGCSE · Osmosis

Osmosis — practice question

(a(i))[3]

Using the information in Table 2.1, calculate the percentage change in mass at $1.00\text{ mol dm}^{-3}$. Give your answer to two decimal places.

(a(ii))[5]

Using the information in Table 2.1, explain the difference in the results between the $0.6\text{ mol dm}^{-3}$ and the $0.8\text{ mol dm}^{-3}$ sucrose solutions. Include the term water potential in your answer.

(a(iii))[2]

Describe the appearance you would expect of a cell from a potato cube after it has been immersed in distilled water for 30 minutes.

(b)[3]

Describe how active transport differs from osmosis.

(c)[1]

State the type of plant cells that use active transport to absorb mineral ions from the environment.

(d)[2]

Explain the effect of a shortage of magnesium ions on the colour of plant leaves.

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