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Flashcards in Energy for biological processed Deck (7)
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Photosynthesis definition

The process by which energy, in the form of light (photon), is used to build up complex organic molecules eg glucose.


Respiration definition

The process by which organic molecules such as glucose are broken down into smaller inorganic molecules eg CO2 and H2O.


Equation for photosynthesis

6CO2 + 6H2O C6H12O6 + 6O2


Equation for respiration

C6H12O6 + 6O2 --> 6CO2 + 6H2O


Need for energy

- active transport (eg for sucrose loading into sieve tube cells, uptake of nitrates by root hair cells)
- anabolic reactions (eg building of polymers like proteins, polysaccharides, nucleic acids)
- movement (eg by cilia, flagella, or contractile filaments in muscle cells)


Importance of C-H bond

Bond energy = either exothermic or endothermic
Large molecules like glucose require less energy to be broken, while small inorganic molecules like CO2 and H2O require a lot of energy in order to be broken.


Chemiosmosis definition

The process by which protons diffuse from a region of high concentration to a region of low concentration through a partially permeable membrane. The movement of protons as they flow releases energy which can then be used to attach a Pi to ADP.