The focus of molecular genetics in biological research is to study the structure, function, and regulation of genes at a molecular level. Researchers analyze DNA, RNA, and proteins to understand how genetic information is transmitted and expressed within organisms. This field investigates the molecular mechanisms underlying inheritance, gene expression, and genetic variations, often using techniques such as CRISPR and sequencing technologies. Insights gained from molecular genetics can lead to advancements in medicine, agriculture, and biotechnology, contributing to the understanding of hereditary diseases and evolutionary processes.