Which Molecule is a "Metabolic Taxicab" That Shuttles Electrons

Question

Which molecule is a "metabolic taxicab" that shuttles electrons?
A) OAA
B) NADH
C) ATP
D) ADP

Accepted Answer

NADH is a coenzyme that acts as a metabolic taxicab, shuttling electrons between different metabolic pathways within the cell. It accepts electrons and a hydrogen ion (H+) from other molecules, such as glucose or fatty acids, and delivers them to the electron transport chain in aerobic respiration for the production of ATP. OAA is a four-carbon compound that plays a key role in the Krebs cycle, ATP is an energy carrier molecule, and ADP is a precursor to ATP that can accept phosphates to become ATP.