Question

Which of the following components of the light dependent reactions is NOT involved in redox reactions?...

Which of the following components of the light dependent reactions is NOT involved in redox reactions?

a. Electron Transport Chain

b. P680

c. P700

d. ATP synthase

e. All of these are involved in redox reactions

Can you explain your reasoning and what they mean by redox reactions?

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Answer #1

Redox (reduction - oxidation) reaction is a type of chemical reaction where reduction and oxidation reaction is occus simultaneously. Reduction means accepting of electron(s)and oxidation means releasing of electron(s).

Electron transport chain is made up of four components. They complex - I, complex - II, complex - III and complex - IV. All of the complex pumps H+ ion. They are involved in redox reaction.

P680 and P700 accept and donate electron during light dependent reaction of photosynthesis. So, the can contribute in redox reaction.

ATP synthase makes ATP by forming the bond between ADP and Pi. But they don't release any electron or don't accept any electron for making ATP. So, ATP synthase (option d) is the correct alternative here.

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