Complex III of the electron transport chain is involved in proton pumping.
DNP, Atractyloside, and FCCP are not all involved in uncoupling of electron transport from oxidative phosphorylation.
H2O is not the terminal electron acceptor in the electron transport chain.
The reducing power of FADH2 is not more than NADH.

Explanation:

Complex III of the electron transport chain is involved in proton pumping:
- Complex III, also known as cytochrome bc1 complex, is a key component of the electron transport chain.
- It plays a crucial role in the transfer of electrons from ubiquinol (QH2) to cytochrome c.
- During this process, complex III transfers protons across the inner mitochondrial membrane, contributing to the proton gradient that drives ATP synthesis.

DNP, Atractyloside, and FCCP are not all involved in uncoupling of electron transport from oxidative phosphorylation:
- DNP (2,4-dinitrophenol), Atractyloside, and FCCP (carbonyl cyanide p-trifluoromethoxyphenylhydrazone) are all known to uncouple electron transport from oxidative phosphorylation.
- Uncouplers disrupt the coupling between electron transport and ATP synthesis, leading to the dissipation of the proton gradient and increased oxygen consumption.
- However, these three compounds do not have the same mechanism of action.
- DNP acts by dissipating the proton gradient directly, while Atractyloside inhibits the adenine nucleotide translocator, preventing ATP synthesis.
- FCCP, on the other hand, allows protons to freely cross the mitochondrial inner membrane, effectively uncoupling electron transport from ATP synthesis.

H2O is not the terminal electron acceptor in the electron transport chain:
- The terminal electron acceptor in the electron transport chain is molecular oxygen (O2).
- After electrons pass through complex IV (cytochrome c oxidase), they are transferred to oxygen, which is reduced to form water (H2O).
- This step is essential for the final transfer of electrons and the generation of a proton gradient across the inner mitochondrial membrane.

The reducing power of FADH2 is not more than NADH:
- In the electron transport chain, both NADH and FADH2 donate electrons to the respiratory chain.
- NADH donates electrons at complex I, while FADH2 donates electrons at complex II.
- Since NADH donates electrons earlier in the chain, it generates more ATP compared to FADH2.
- NADH transfers its electrons to complex I, leading to the pumping of more protons and the generation of a larger proton gradient.
- Therefore, the reducing power of NADH is higher, resulting in the production of more ATP compared to FADH2.

In conclusion, all the statements provided in the options are false. Complex III is involved in proton pumping, DNP, Atractyloside, and FCCP have different mechanisms of action in uncoupling electron transport, H2O is not the terminal electron acceptor, and the reducing power of FADH2 is lower than that of NADH.