How many electrons and protons does the oxidized form of nicotinamide adenine dinucleotide accept when it becomes NADH?
ATwo electrons and one proton
BTwo electrons and two protons
COne electron and one proton
DOne electron and two protons
Answer & Solution
Correct answer: A. Two electrons and one proton
1. Reduction of this carrier means it gains electrons plus a proton.
2. NADH is the reduced form reached after accepting two electrons and a proton.
3. Two electrons and one proton together amount to a hydrogen atom carrying an extra electron.
4. Counting two protons is the usual trap, because the reduced name ends in H and suggests hydrogen twice over.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.1 Energy in Living Systems_
Related questions
In type 2 diabetes the oxidation efficiency of NADH is reduced, which affects:Where does the carbon dioxide released during cellular respiration come from?The citric acid cycle is described as amphibolic because its intermediates can also be useHydrogen ions pumped by the electron transport chain accumulate in the:The mobile carrier connecting the first and second complexes to the third is:How many complexes make up the electron transport chain?Making ATP by chemiosmosis is called oxidative phosphorylation because the process involveChemiosmosis accounts for roughly what share of the ATP made during glucose catabolism?