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2 marksPhotosynthesis and ATP Synthesis

CAPE Biology Unit 2 · 2004 · Paper 2 · Question 1(a)

Data showing daily photosynthetic carbon gain and photosynthetic rate under varying carbon dioxide and light conditions for Shorea leprosula.

Explain why daily carbon gain in Shorea leprosula is higher in uniform sunlight than in flecked sunlight.

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Other parts of this question

  1. 1(b)(i)Determine the difference in daily carbon gain in Shorea leprosula grown in flecked sunshine and uniform sunshine at 350 units of carbon dioxide.[1 mark]
  2. 1(b)(ii)Determine the difference in daily carbon gain in Shorea leprosula grown in flecked sunshine and uniform sunshine at 700 units of carbon dioxide.[1 mark]
  3. 1(c)(i)Determine the average, MAXIMUM photosynthetic rate of Shorea leprosula at elevated carbon dioxide concentration (700 units).[1 mark]
  4. 1(c)(ii)Determine the average, MAXIMUM photosynthetic rate of Shorea leprosula at ambient carbon dioxide concentration.[1 mark]
  5. 1(d)Calculate the difference in photosynthetic rate between the elevated and ambient carbon dioxide concentrations in (c)(i) and (ii).[1 mark]
  6. 1(e)Explain why the daily carbon gain in Shorea leprosula is higher at 700 units of CO2 than at 350 units of CO2.[2 marks]
  7. 1(f)Suggest why carbon gain does not double as CO2 concentration doubles.[1 mark]

More practice: the rest of this paper · more Photosynthesis and ATP Synthesis questions · all CAPE Biology Unit 2 past papers