Biology 0610 · IGCSE · Osmosis

Osmosis — practice question

Fig. 2.1 depicts red blood cells in three salt solutions of different concentrations. In salt solution A the red blood cell is crenated/shrunken, in salt solution B it has a normal biconcave shape, and in salt solution C it is swollen/lysed.
(a(i))[2]

From Fig. 2.1, state the letter of the salt solution whose concentration is similar to blood plasma. Explain your choice.

(a(ii))[1]

Using the information in Fig. 2.1, arrange salt solutions A, B and C in order of rising salt concentration.

(b)[2]

State the names of two substances, other than blood cells, that are carried in blood plasma.

(c)[2]

Describe the appearance of a plant cell after it has been placed in distilled water for one hour.

(d)[4]

Place ticks (✓) in the rows to show whether the statement is true for diffusion or osmosis or both.

(e)[1]

State the name of the type of particle movement that uses energy from respiration.

Worked solution & mark scheme

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