Biology 0610 · IGCSE · Diffusion

Diffusion — practice question

(a)[4]

Finish the statements about diffusion. Diffusion is the net movement of particles from a region of their [BLANK] concentration to a region of their [BLANK] concentration (down a concentration [BLANK]). The energy for diffusion comes from the [BLANK] energy of the [BLANK] movement of molecules.

(b(i))[1]

State which chemical elements are present in starch.

(b(ii))[1]

State the name of one additional molecule produced from glucose in plant cells.

(c(i))[1]

State the name of the cell structure represented by the dialysis tubing.

(c(ii))[2]

Explain why these results occurred.

(d)[1]

State the name of the enzyme responsible for breaking down starch into reducing sugars.

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