Which type of processes predominates according to Hanawalt's law?

According to Hanawalt's law, the focus is primarily on non-spontaneous processes. This principle highlights that certain biological and chemical reactions, particularly in living systems, do not occur spontaneously and require an input of energy to proceed. In biological contexts, non-spontaneous processes often involve reactions that build complex molecules or structures, necessitating energy input from external sources.

Understanding this law is critical because it helps explain how organisms persist in maintaining homeostasis and carrying out functions that are vital for life. By emphasizing the requirement for energy in non-spontaneous processes, the law underscores the importance of metabolic pathways and the role of ATP (adenosine triphosphate) as a source of energy in cells. This concept is foundational in both biology and biochemistry, illustrating the balance between spontaneous and non-spontaneous reactions in biological systems.