Biology / Unit 3 Bio 0538 short lesson, about 20 seconds
Substrate-Level Phosphorylation
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The idea
Substrate-level phosphorylation makes ATP directly, by transferring a phosphate group from a reaction intermediate straight onto ADP.
In practice
A step late in glycolysis transfers a phosphate from an intermediate molecule directly onto ADP, producing ATP without any electron transport chain.
Where people slip
Substrate-level phosphorylation is direct and immediate — it does not depend on the multi-step chemiosmotic process covered later in this unit.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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