rgy and chemical substances needed for life.
Part II:Biological Perspective(Continued)
2.1 Molecular Basis of Life
The molecular basis of life includes nucleic acids(DNA and RNA)and proteins.These molecules not only store and transmit genetic information but also participate in various biochemical reactions within cells.Understanding how these molecules formed on Earth is crucial for speculating on the possibility of extraterrestrial life.
2.2 Metabolic Pathways of Life
The metabolic pathways of life are the foundation for organisms to obtain energy and synthesize biomolecules.Life on Earth mainly relies on photosynthesis and chemosynthesis.The existence and efficiency of these metabolic pathways determine the complexity and diversity of life forms.
2.3
