What does the central dogma of molecular biology state?

• A. Proteins are transformed into RNA, then into DNA
• B. DNA is transcribed into RNA, which is then translated into proteins
• C. RNA is synthesized from proteins that are stored in the nucleus
• D. Proteins lead to the formation of DNA through translation

Answer: (B)

The central dogma of molecular biology outlines the fundamental processes by which genetic information flows within a biological system. It states that DNA is transcribed into RNA, which is then translated into proteins. This sequence captures the pathway of genetic information: first, the DNA serves as a template to create messenger RNA (mRNA) during the transcription process in the nucleus. Subsequently, this mRNA travels to the ribosome where it guides the assembly of amino acids into proteins in a process known as translation.

Understanding this flow of information is crucial because proteins, which carry out a vast array of functions within the cell, are ultimately synthesized based on the genetic code encoded in DNA. This framework also highlights the relationship between the three types of nucleic acids involved—DNA, RNA, and proteins.

In contrast, the other options indicate incorrect processes or sequences that do not align with the established understanding of molecular biology, making them invalid representations of the central dogma.