Which process is directly driven by light energy? 1) Creation of a pH gradient by pumping protons...

Question:

Which process is directly driven by light energy?

1) Creation of a pH gradient by pumping protons across the thylakoid membrane

2) Carbon fixation in the stroma

3) Reduction of NADP+ molecules

4) Removal of electrons from chlorophyll molecules

5) ATP synthesis

The Light-Dependent Reaction:

Photosynthesis is composed of two consecutive phases: light-dependent reactions followed by the light-independent reactions. The light-dependent reaction, as the name implies, relies on solar energy to initiate the reactions that lead to ATP synthesis and reduction of NADP+ into NADPH. These products of the light-dependent reaction are vital for the light-independent reaction. Since the light-dependent reaction makes use of the photosynthetic pigment chlorophyll, it takes place in the thylakoid space of the chloroplast whereas the light-independent reaction takes place in the stroma.

Answer and Explanation: 1

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The correct answer is option 4.


Light energy is vital in photosynthesis. Without light, plants cannot possibly initiate the process that...

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Photolysis and the Light Reactions: Definitions, Steps, Reactants & Products

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Chapter 8 / Lesson 8
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Explore the light reaction of photosynthesis. Learn about the location, reactants, and products of light dependent reactions and photolysis in the lesson below.


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