What substance in cytoplasm facilitates chemical reactions?

The correct answer is enzymes because they are biological catalysts that speed up chemical reactions in the cytoplasm of cells. Enzymes lower the activation energy required for reactions, which allows processes such as metabolism, energy production, and synthesis of molecules to occur more efficiently and within the temperature range that the cell can sustain. Without enzymes, many essential biochemical reactions would proceed too slowly to support life.

Cell sap is a liquid found in plant cells that contains various substances, including sugars and nutrients, but it does not facilitate chemical reactions in the same way that enzymes do. DNA is the genetic material that carries instructions for building proteins and other functions in the cell, but it is not directly involved in catalyzing reactions. Chlorophyll is the pigment involved in photosynthesis, allowing plants to capture light energy, but it does not play a role in facilitating chemical reactions within the cytoplasm.