What is the primary role of DNA in cells?

What is the primary role of DNA in cells?

• A. Storage of energy
• B. Transmission of genetic information
• C. Structural support
• D. Catalysis of reactions

Answer: (B)

The primary role of DNA in cells is the transmission of genetic information. DNA contains the instructions necessary for the development, functioning, growth, and reproduction of all known living organisms and many viruses. It serves as the hereditary material, allowing for the transfer of genetic traits from one generation to the next. DNA directs the synthesis of proteins through the processes of transcription and translation, where segments of DNA are transcribed into messenger RNA (mRNA), which then guides the assembly of amino acids into proteins based on the genetic code. This process is essential for the expression of genes and ultimately determines an organism’s traits and functions. While other molecules in the cell are involved in catalysis (such as enzymes) and energy storage (like ATP), DNA's unique structure and sequence of nucleotides specifically enable it to encode and transmit genetic information, making it indispensable for life.

The primary role of DNA in cells is the transmission of genetic information. DNA contains the instructions necessary for the development, functioning, growth, and reproduction of all known living organisms and many viruses. It serves as the hereditary material, allowing for the transfer of genetic traits from one generation to the next.

DNA directs the synthesis of proteins through the processes of transcription and translation, where segments of DNA are transcribed into messenger RNA (mRNA), which then guides the assembly of amino acids into proteins based on the genetic code. This process is essential for the expression of genes and ultimately determines an organism’s traits and functions.

While other molecules in the cell are involved in catalysis (such as enzymes) and energy storage (like ATP), DNA's unique structure and sequence of nucleotides specifically enable it to encode and transmit genetic information, making it indispensable for life.