Final answer:
Different cell types responding to the same hormone do not usually turn on the same sets of genes; instead, they express different genes which leads to varied cell functions and differentiation.
Step-by-step explanation:
The statement that different cell types that respond to the same hormone usually turn on the same sets of genes is false. Although every cell in a multicellular organism contains the same set of genes, different cells can express different genes, leading to the creation of different proteins and resulting in diverse cell functions. Cells contain different genes which produce different receptors that can bind to the same hormone (ligand), activating different responses in each cell. Additionally, cells can produce the same receptor that binds to the same ligand but may have different signaling components, thereby triggering different responses. Different gene expression is the mechanism by which cells differentiate and specialize in multicellular organisms.