Problem 15.3 Assume a pH gradient of 4.0 units across a thylakoid membrane, with the lumen...

Problem 15.3

Assume a pH gradient of 4.0 units across a thylakoid membrane, with the lumen more acidic than the stroma.

please answer: 1) What is the standard free energy change per molO2 produced?

2) How does this compare to the energy required to drive the synthesis of ATP?

How does this compare to the energy required to drive the synthesis of ?

A)Its equal.

B)Its several times less.

C) Its several times more.

Expert Solution

The absorption of 4 photons by photosystem II generates 1 molecule of O₂ and releases 4 protons into the thylakoid lumen.

Please have a look at for more details at

https://www.ncbi.nlm.nih.gov/books/NBK22519/

from above it is clear that 1 mol H+ = 1 mol O₂

answer is same as Part A i.e 22.8 kJ/mol O₂

queen_honey_blossom answered 2 years ago

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