Single-cell RNA sequencing (scRNA-seq) is a powerful technique used in molecular biology to analyze gene expression profiles at the level of individual cells. This technology allows researchers to better understand the heterogeneity and diversity of cell populations within tissues or organisms. By capturing the transcriptome of individual cells, scRNA-seq can reveal important insights into cell types, cell states, and cellular interactions. This technique has broad applications in fields such as developmental biology, immunology, cancer research, and neuroscience, enabling researchers to study complex biological systems with unprecedented resolution and detail.