Final answer:
Testosterone is the hormone that would bind to receptors inside of a cell, influencing the expression of genes by directly interacting with the cell's DNA.
Step-by-step explanation:
The hormone that would bind to receptors inside of a cell is testosterone. Unlike hormones such as growth hormone, insulin, and follicle-stimulating hormone (FSH) which bind to cell membrane receptors and often utilize second messenger systems, testosterone is a steroid hormone that can easily pass through the lipid bilayer of the cell membrane and bind to intracellular receptors. Once bound to these internal receptors, testosterone can directly influence the expression of specific genes by interacting with the cell's DNA.