Molecular Cell Biology is a branch of biology that focuses on the molecular mechanisms within cells. It studies how molecules such as DNA, RNA, and proteins interact to regulate cellular functions. This field combines aspects of biochemistry, genetics, and cell biology to understand how cells operate and communicate. Researchers in Molecular Cell Biology investigate processes like cell division, gene expression, and signal transduction. By examining these processes at the molecular level, scientists can gain insights into how cells respond to their environment and how abnormalities can lead to diseases, including cancer and genetic disorders.