
Biochemistry | Definition, History, Examples, Importance, & Facts ...
Feb 12, 2025 · Biochemistry is the study of the chemical substances and processes that occur in plants, animals, and microorganisms and of the changes they undergo during development …
Plant - Pathways, Cycles, Photosynthesis | Britannica
Feb 26, 2025 · Plant - Pathways, Cycles, Photosynthesis: Metabolic pathways and cycles can be either catabolic or anabolic. Enzymes are the primary mechanism of metabolic control; another …
Biochemical oxygen demand (BOD) | Britannica
Mar 4, 2025 · biochemical oxygen demand (BOD), the amount of dissolved oxygen used by microorganisms in the biological process of metabolizing organic matter in water. The more …
Carbon cycle | Definition, Steps, Importance, Diagram, & Facts
Feb 18, 2025 · Algae and terrestrial green plants (producers) are the chief agents of carbon dioxide fixation through the process of photosynthesis, through which carbon dioxide and …
Metabolism | Definition, Process, & Biology | Britannica
Mar 9, 2025 · In plants, all but two of the steps in the process that converts carbon dioxide to carbohydrates are the same as those steps that synthesize sugars from simpler starting …
Cellular respiration | Definition, Equation, Cycle, Process, Reactants ...
Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, …
Biomolecule | Definition, Structure, Functions, Examples, & Facts ...
Feb 15, 2025 · Biomolecule, any of numerous substances that are produced by cells and living organisms. Biomolecules have a wide range of sizes and structures and perform a vast array …
Carbohydrate - Energy, Structure, Nutrition | Britannica
Mar 20, 2025 · The essential process in the biosphere, the portion of Earth in which life can occur, that has permitted the evolution of life as it now exists is the conversion by green plants of …
Germination | Description, Process, Diagram, Stages, Types,
Feb 12, 2025 · In some species, germination is promoted by exposure to light of appropriate wavelengths. In others, light inhibits germination. For the seeds of certain plants, germination …
Enzyme | Definition, Mechanisms, & Nomenclature | Britannica
Mar 10, 2025 · Practically all of the numerous and complex biochemical reactions that take place in animals, plants, and microorganisms are regulated by enzymes, and so there are many …