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Molecular biology focuses on understanding the interactions and mechanisms of biological molecules, such as DNA, RNA, proteins, and carbohydrates, to study life at the molecular level. It interweaves various disciplines like genetics, chemistry, physics, and mathematics to elucidate the intricate processes within cells. As a part of the "RNA" hierarchy in the broader context of "Genetics" and "Science", molecular biology investigates the roles of RNA molecules in gene expression, regulation, and function, shedding light on their diverse forms and cellular activities. By exploring these relationships at the molecular level, researchers aim to deepen our understanding of genetic inheritance, developmental biology, and disease pathophysiology.