Molecular probes are specialized tools used in biological research to detect and visualize specific molecules within cells or tissues. They can be made from various materials, including fluorescent dyes, antibodies, or nucleic acid sequences. By binding to their target molecules, these probes help scientists study cellular processes, gene expression, and disease mechanisms. These probes are essential in techniques like fluorescence microscopy and in situ hybridization, allowing researchers to observe the location and abundance of specific proteins or genes. Their ability to provide real-time insights into biological systems makes them invaluable in fields such as molecular biology and medical diagnostics.