For other uses of "energy" see Energy.

Flowchart of cellular respiration

Growth, development and metabolism are some of the central phenomena in the study of biology. They cannot be explained without invoking the energy concept. Indeed sustenance of life itself is critically dependent on energy transformations; living organisms survive because of exchange of energy within and without. In a living organism chemical bonds are constantly broken and made to make the exchange and transformation of energy possible. These chemical bonds are most often bonds in carbohydrates, including sugars. Other chemical bonds include bonds in chemical compounds that are important for metabolism, for example, those in a molecule of ATP or fats and oils.^[1] These molecules, along with oxygen, are common stores of concentrated energy for the biological processes. One can therefore assert that transformation of energy from a more to a less concentrated form is the driving force of all biological processes or chemical processes that are responsible for the life of a biological organism. Molecular biology and biochemistry are in fact scientific studies concerning the making and breaking of chemical bonds in the molecules found in biological organisms. Image File history File links Cellular_respiration_flowchart. ... Image File history File links Cellular_respiration_flowchart. ... Cellular respiration describes the metabolic reactions and processes that take place in a cell to obtain biochemical energy from fuel molecules. ... The term cell growth is used in two different ways in biology. ... Views of a Foetus in the Womb, Leonardo da Vinci, ca. ... A few of the metabolic pathways in a cell. ... This article or section does not cite any references or sources. ... For other uses, see Life (disambiguation). ... In physics and engineering,energy transformation often termed as energy conversion, is any process of transforming one form of energy to another. ... A chemical bond is the physical process responsible for the attractive interactions between atoms and molecules, and that which confers stability to diatomic and polyatomic chemical compounds. ... Carbohydrates (literally hydrates of carbon) are chemical compounds that act as the primary biological means of storing or consuming energy, other forms being fat and protein. ... A few of the metabolic pathways in a cell. ... Adenosine 5-triphosphate (ATP) is a multifunctional nucleotide that is most important as a molecular currency of intracellular energy transfer. ... ... A biological process is a process of a living organism. ... A biological process is a process of a living organism. ... sulfur sucks--207. ... Molecular biology is the study of biology at a molecular level. ... Biochemistry is the study of the chemical processes and transformations in living organisms. ... In science, a molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. ... In biology and ecology, an organism (in Greek organon = instrument) is a living being. ...

As with other natural phenomena, the exchange of metabolic energy in biological organisms also increases the entropy of the universe. Nearly all energy transformations studied in biology are due to the chemical synthesis and decompositions ultimately brought about by the energy absorbed from photons in sunlight through insolation^[2] and photosynthesis.^[3] The total energy captured by photosynthesis in green plants from the solar radiation is about 2 x 10²³ joules of energy per year.^[4] This is about 4% of the total sunlight energy which reaches Earth. Ice melting - classic example of entropy increasing[1] described in 1862 by Rudolf Clausius as an increase in the disgregation of the molecules of the body of ice. ... Chemosynthesis is the biological conversion of 1-carbon molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic molecules (e. ... TOA and surface insolation, annual mean Insolation is the incoming solar radiation that reaches a planet and its atmosphere or, by extension, any object exposed to solar rays, such as watts per square meter of Sun-facing cross section, across the entire electromagnetic spectrum; most of that power is in... The leaf is the primary site of photosynthesis in plants. ...

The predator-prey relationships, food chains, are in effect energy transformations within ecosystems that are studied in ecology. This article or section does not cite any references or sources. ... In ecology, an ecosystem is a community of organisms (plant, animal and other living organisms - also referred as biocenose) together with their environment (or biotope), functioning as a unit. ... This article or section does not cite any references or sources. ...

See also

• Energy flow
• Biological thermodynamics
• Bioenergetic analysis
• Cellular respiration
• Photosynthesis
• Chemosynthesis

The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... Biological thermodynamics (Greek: bios = life and logikos = reason + Greek: thermos = heat and dynamics = power) is the study of energy transformation in the biological sciences. ... Bioenergetic Analysis is a body-oriented psychotherapy based on the expression of feelings and the re-establishment of energy flow in the body. ... Cellular respiration describes the metabolic reactions and processes that take place in a cell to obtain biochemical energy from fuel molecules. ... The leaf is the primary site of photosynthesis in plants. ... Chemosynthesis is the biological conversion of 1-carbon molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic molecules (e. ...

Notes and references