Biology 5090 · O Level · Nutrient cycles

Nutrient cycles — practice question

(a)[3]

Describe the ways in which a bacterial cell is unlike a typical animal cell.

(b)[3]

Describe the role played by bacteria in nitrogen fixation.

(c)[4]

Describe the role of bacteria after a river has been polluted by sewage.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “cell wall is present / there is no true nucleus” …

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