Show the reduction of pyruvate by NADH. Since NADH reduces molecules by a hydride reduction, what type of reaction is pyruvate undergoing? 
Definitions:
Preoperational Children
Refers to the stage in Jean Piaget's theory where children aged 2 to 7 years old engage in symbolic play and struggle with logic and taking the perspective of others.
Three-Mountain Problems
A cognitive task developed by Jean Piaget to assess a child's ability to understand perspectives different from their own, involving models of mountains viewed from various angles.
Cognitive Development
Cognitive development encompasses the progression and enhancement of thinking, problem-solving, and decision-making abilities from infancy through adulthood.
Object Permanence
The cognitive understanding that objects continue to exist even when they cannot be seen, heard, or touched.
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