Question

Select the correct option:

During electron transport system(ETS), electron transport proceeds from carriers that have ________ redox potential to those having _______ redox potential. This electron transport down the energy gradient leads to the formation of ATP from ADP and Pi, which is referred to as ___________.

• A. Low, high, oxidative phosphorylation
• B. Low, high, oxidative decarboxylation
• C. High, low, oxidative phosphorylation
• D. High, low, oxidative decarboxylation

Answer 1

The correct option is A Low, high, oxidative phosphorylation

Many intermediate cytochromes and other carriers having their intermediate redox potentials are arranged in a series which transport electrons from NADH or ${FADH}_2$ to $O_2$. This sequence of electron carriers constitutes the electron transport system (ETS). The electron transport proceeds from carriers that have low redox potential to those having high redox potential. The electron transport down the energy gradient through the electron transport system leads to the formation of ATP from ADP and inorganic phosphate. This generation of ATP is called oxidative phosphorylation.

So the correct answer is 'Low, high, oxidative phosphorylation'.