What is the primary source of heritable information in most living organisms?

• A. DNA
• B. Lipids
• C. Carbohydrates
• D. Proteins

Answer: (A)

Verified step by step guidance

1. Understand the question: The problem is asking about the primary source of heritable information in most living organisms. Heritable information refers to the genetic material that is passed from one generation to the next.
2. Review the options: The options provided are DNA, lipids, carbohydrates, and proteins. Each of these biomolecules has a specific role in living organisms, so we need to determine which one is responsible for storing and transmitting genetic information.
3. Recall the function of DNA: DNA (Deoxyribonucleic Acid) is a nucleic acid that contains the instructions for the development, functioning, growth, and reproduction of all known living organisms. It is the molecule that carries genetic information in the form of sequences of nucleotides.
4. Eliminate incorrect options: Lipids are primarily involved in energy storage and forming cell membranes. Carbohydrates are mainly used for energy and structural purposes. Proteins perform a wide range of functions, including acting as enzymes, but they do not store genetic information.
5. Conclude: Based on the above analysis, DNA is the correct answer as it is the primary source of heritable information in most living organisms.