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1 markCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · 2003 · Paper 1 · Question 6(a)(ii)

Figure 7 shows the analysis of carbon dioxide evolution and ethylene concentration given off by harvested green bananas over 12 days.

What is the MAIN chemical process that causes the effect at days 9 to 10?

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  1. 6(a)(i)Comment on the volumes of gases produced, their sequence, and interrelationships.[3 marks]
  2. 6(a)(iii)State ONE other chemical process occurring in the bananas that is associated with this peak.[1 mark]
  3. 6(b)(i)Suggest how this knowledge could be used to produce a market-ready fruit.[1 mark]
  4. 6(b)(ii)State when the use of that knowledge could be applied.[1 mark]
  5. 6(c)(i)To delay fruit ripening, shippers may reduce oxygen levels to 5% and increase nitrogen levels correspondingly. What other process, which also produces CO2,…[2 marks]
  6. 6(c)(ii)Genetically altered forms of ethylene biosynthetic inhibitor enzymes have been transferred into tomato plants. Suggest ONE way in which the development of the…[1 mark]

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