: All prokaryotes lack a nucleus but feature a nucleoid, ribosomes, and a plasma membrane; most possess a complex peptidoglycan cell wall.
💡 The Physiology and Biochemistry of Prokaryotes - Ebook
Prokaryotes (Bacteria and Archaea) are the most diverse organisms on Earth, possessing unique biochemical pathways and physiological adaptations that allow them to thrive in environments ranging from deep-sea vents to the human gut. Their physiology centers on how these single-celled organisms solve physical and chemical problems to grow, while their biochemistry explores the molecular mechanisms—such as enzyme function and metabolic flux—that sustain life. Key Physiological & Biochemical Themes
: Survival is driven by the proton motive force and membrane-bound electron transport chains that facilitate oxidative phosphorylation.
: Extremophiles utilize thermostable enzymes and unique cofactors like iron-sulfur clusters to function in high-heat or high-salinity conditions.