Biology

Correct Answer: C.Both are recognized by specialized protein receptors on target cells.

Explanation:

Both lipid-based hormones (e.g., steroids) and protein-based hormones (e.g., peptides) are recognized by specialized protein receptors on target cells. However, their mechanisms differ:

1.Lipid-based hormones are lipophilic (fat-soluble) and can diffuse through the cell membrane. Once inside, they bind to intracellular receptors in the cytoplasm or nucleus, affecting gene expression directly.

2.Protein-based hormones are hydrophilic (water-soluble) and cannot pass through the cell membrane. Instead, they bind to membrane-bound receptors, triggering second messenger pathways (like cAMP or IP3) to signal inside the c...