What are the three key roles of DNA in living organisms?

• A. Transporting oxygen, storing genetic information, and replicating during cell division
• B. Providing energy, storing nutrients, and coding for proteins
• C. Regulating temperature, providing structural support, and storing genetic information
• D. Storing genetic information, replicating during cell division, and coding for proteins

Answer: (D)

Verified step by step guidance

1. Understand that DNA is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.
2. Recognize that one of the primary roles of DNA is to store genetic information. This information is encoded in the sequence of nucleotides and is crucial for the inheritance of traits.
3. Acknowledge that DNA must be able to replicate during cell division. This ensures that each new cell receives an exact copy of the DNA, maintaining genetic continuity.
4. Identify that DNA codes for proteins. The sequence of nucleotides in DNA is transcribed into mRNA, which is then translated into a specific sequence of amino acids to form proteins, essential for various cellular functions.
5. Eliminate the incorrect options by matching the roles of DNA with the correct biological processes: storing genetic information, replicating during cell division, and coding for proteins.