Enzyme complex???????

Question

What is the role of enzyme complex 1?

A. Receive electrons from NADH

B. Transfer electrons to NAD+

C. Power Krebs cycle

D. Produce ATP from sugar

Answer 1

A. Receive electrons from NADH in the electron transport chain.

Complex I takes two electrons from NADH and transfers them to ubiquinone in the inner-mitochondrial membrane. It uses the energy released from this process to move four protons across the membrane, creating charge separation across the membrane.