Final answer:
Multiple-enzyme sequences that activate each other in a sequence demonstrate enzyme activation, distinct from both allosteric regulation and feedback inhibition.
Step-by-step explanation:
Multiple-enzyme sequences in which each enzyme in the sequence activates another enzyme is an example of enzyme activation. This type of sequential activation is a vital part of cellular regulatory mechanisms, which ensure that metabolic pathways are controlled precisely within the cell. It differs from allosteric regulation and feedback inhibition, which involve molecules binding to an enzyme at a location other than the active site, causing conformational changes that either increase or decrease the enzyme's activity. While allosteric regulation can involve activators that enhance enzyme function, feedback inhibition usually involves the end product of a metabolic pathway inhibiting an enzyme that acts earlier in the pathway, preventing the overproduction of the end product.