BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Signal transduction pathway involves the binding of extracellular signaling molecules and ligands to receptors located on the cell surface or inside the cell that trigger events inside the cell, to invoke a response. The response can then alter the cell’s metabolism, shape, and gene expression (Krauss, 2006).

Detailed explanation-2: -Some examples of signal transduction pathways include vision and touch and hormones.