Question

what is the name of the group of proteins that can reduce the activation energy for metabolic reactions in the cell?
carbohydrates
enzymes
substrates
proteins

Explanation:

Enzymes are biological catalysts (proteins in most cases) that lower the activation energy of metabolic reactions in cells. Carbohydrates are energy - providing molecules. Substrates are the substances on which enzymes act. While enzymes are proteins, the more specific term for the group of proteins that reduce activation energy is enzymes.

Answer:

enzymes