Question

the reaction \cascade\ in glycolysis cannot continue without unloading hydrogen from which molecule?
nadh
atp
adp
nad+

Explanation:

In glycolysis, the reaction cascade requires the regeneration of NAD+ from NADH. When hydrogen is unloaded from NADH, it is oxidized back to NAD+ which is essential for glycolysis to continue. ATP and ADP are involved in energy - transfer processes in glycolysis but not in the context of hydrogen - unloading for the reaction to proceed.

Answer:

NADH