What are the four most abundant elements in biomolecules?

The four most abundant elements in biomolecules are:

1. Carbon (C): It forms the backbone of organic molecules and is essential for the structure of biomolecules.
2. Hydrogen (H): It is involved in forming water and organic compounds, playing a crucial role in energy transfer and storage.
3. Oxygen (O): It is a key component of water and organic molecules, and is vital for cellular respiration.
4. Nitrogen (N): It is a fundamental part of amino acids and nucleic acids, which are essential for protein synthesis and genetic information storage.

These elements are the building blocks of life and are found in high abundance in living organisms.