AS Biology Photosynthesis Definitions Flash Cards

Question	Answer
Autotrophs	Organisms that use light energy or chemical energy and inorganic molecules to synthesise complex organic molecules
Heterotrophs	Organisms that ingest and digest complex organic molecules, releasing the chemical potential energy stored in them.
Photosynthetic Pigments	Molecules that absorb light energy.
Photophosphorylation	the making of ATP from ADP and Pi in the presence of light.
Electron Carriers	Molecules that transfer electrons.
Electron Acceptors	Chemicals that accept electrons from another compound.
Light-Dependent Stage	Where carbon dioxide is fixed and used to build complex organic molecules.
Limiting Factor	A factor that is present at the lowest or least favourable value.
Photosynthometer	Instrument used to measure the rate of photosynthesis by collecting and measuring the volume of oxygen produced in a certain time.

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