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5 marksEnergy Flow and Nutrient Cycling

CAPE Biology Unit 2 · 2011 · Paper 2 · Question 4(c)(i)

Distinguish among the following terms as they relate to the nitrogen cycle: nitrification, denitrification, and nitrogen fixation.

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  1. 4(a)Define the term 'phosphorylation' and distinguish between photophosphorylation and oxidative phosphorylation.[3 marks]
  2. 4(b)Discuss TWO similarities and TWO differences between the chemical reactions which occur during photophosphorylation and oxidative phosphorylation.[4 marks]
  3. 4(c)(ii)A farmer experiencing difficulty growing grass is advised to plant alfalfa along with the grass and plough the legume into the soil after reaping. Suggest…[3 marks]

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