Which of the following best describes the primary function of DNA in living organisms?

• A. To store genetic information that guides the development and functioning of organisms
• B. To provide energy for cellular processes
• C. To transport oxygen throughout the body
• D. To catalyze biochemical reactions as enzymes

Answer: (A)

Verified step by step guidance

1. Understand the role of DNA in living organisms: DNA (Deoxyribonucleic Acid) is a molecule that contains the genetic instructions necessary for the growth, development, functioning, and reproduction of all known living organisms and many viruses.
2. Eliminate incorrect options: DNA does not provide energy for cellular processes. Energy is primarily provided by molecules like ATP (Adenosine Triphosphate).
3. Eliminate incorrect options: DNA does not transport oxygen throughout the body. Oxygen transport is primarily carried out by hemoglobin in red blood cells.
4. Eliminate incorrect options: DNA does not catalyze biochemical reactions as enzymes. Enzymes are proteins that speed up chemical reactions, whereas DNA serves as a blueprint for making proteins, including enzymes.
5. Conclude the correct answer: The primary function of DNA is to store genetic information that guides the development and functioning of organisms. This information is encoded in the sequence of nucleotides within the DNA molecule.