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1 markPaper 1 · Multiple choicePhotosynthesis and ATP Synthesis

CAPE Biology Unit 2 · 2011 · Paper 1 · Question Q3

Item 3 refers to the reaction scheme below which shows the dark reaction pathway of the Calvin Cycle occurring for about 20 seconds. Which of the following correctly identifies the compounds, X and Y?

  1. (A)X: Phosphoglyceric acid, Y: Triose phosphate
  2. (B)X: Triose phosphate, Y: Phosphoglyceric acid
  3. (C)X: Simple sugars, Y: Proteins
  4. (D)X: Acetyl CoA, Y: Succinic acid

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