Which trace element is essential for DNA and RNA synthesis as a key cofactor?

Which trace element is essential for DNA and RNA synthesis as a key cofactor?

• A. Zinc
• B. Iron
• C. Copper
• D. Manganese

Answer: (A)

Zinc is a key cofactor for many proteins involved in nucleic acid metabolism. It helps stabilize the structure of DNA-binding proteins that regulate transcription (the proteins that enable RNA synthesis) through zinc finger motifs, allowing proper initiation and control of gene expression. Beyond transcription, zinc supports the activity and integrity of various enzymes that handle nucleic acids, including those involved in DNA replication and repair. This broad involvement means zinc is essential for both DNA and RNA synthesis. While iron or manganese participate in specific enzymes within nucleic acid metabolism, zinc’s widespread role in supporting the proteins that read, transcribe, and repair DNA makes it the primary trace element linked to enabling nucleic acid synthesis. Copper has fewer direct connections to these core processes.

Zinc is a key cofactor for many proteins involved in nucleic acid metabolism. It helps stabilize the structure of DNA-binding proteins that regulate transcription (the proteins that enable RNA synthesis) through zinc finger motifs, allowing proper initiation and control of gene expression. Beyond transcription, zinc supports the activity and integrity of various enzymes that handle nucleic acids, including those involved in DNA replication and repair. This broad involvement means zinc is essential for both DNA and RNA synthesis. While iron or manganese participate in specific enzymes within nucleic acid metabolism, zinc’s widespread role in supporting the proteins that read, transcribe, and repair DNA makes it the primary trace element linked to enabling nucleic acid synthesis. Copper has fewer direct connections to these core processes.