Question

incomplete reduction of oxygen during the electron transport chain of cellular respiration may result in production of ____that are damaging to cells

a. CO2, CO

b. FADH, H2O

c. H2O, O2

d. NADH, O2

e. O2-,H2O2

Answer 1

incomplete reduction of oxygen during the electron transport chain of cellular respiration may result in production of e. O2-,H2O2 that are damaging to cells.

Generally ,incomplete reduction of oxygen during electron transport chain generate Reactive Oxygen Species (ROS) or free radical like H2O2, O2-, OH- etc.

These Free radical has an unpaired valence electron ,and they are highly unstable molecules which react with many biomolecule and damage it. When react with protein then break disulfide bond and denatured it, result in cellular damage.