Photosynthesis

AP Biology· difficulty 2/5

A student labels a chloroplast diagram with reactants and products of each set of reactions.

Chloroplast Light Rxns (thylakoid) Calvin Cycle (stroma) ATP, NADPH ADP, NADP+ H2O,light O2 CO2 G3P

Which inputs and outputs are correctly assigned to the light reactions?

  • A

    Inputs: G3P and light; outputs: O2 and CO2

  • B

    Inputs: NADPH and CO2; outputs: H2O and ADP

  • C

    Inputs: H2O and light; outputs: O2, ATP, NADPH

    check_circle
  • D

    Inputs: CO2 and ATP; outputs: G3P and O2

Explanation

Light reactions in thylakoids split H2O (releasing O2), use light to drive electron transport, and produce ATP and NADPH that fuel the Calvin cycle in the stroma.

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