What major advancement in biology was achieved through the work of Watson and Crick?

• A. Understanding of cellular respiration
• B. Structure of DNA
• C. Theory of evolution
• D. Discovery of vaccines

Answer: (B)

Watson and Crick are most renowned for elucidating the double helix structure of DNA, which represents a foundational advancement in molecular biology. Their model proposed that DNA consists of two strands that coil around each other, with base pairs connecting the strands and determining genetic information. This discovery not only clarified how genetic information is stored and transmitted but also paved the way for subsequent breakthroughs in genetic research, biotechnology, and understanding hereditary diseases. Understanding the structure of DNA enabled scientists to explore the mechanisms of replication, transcription, and translation, forming the basis of modern genetics and molecular biology. Their pioneering work fundamentally transformed the field and set the stage for advances in genetic engineering and genomics.