Dictionary » P » Photolysis

Photolysis

Definition

noun

The splitting or decomposition of a chemical compound by means of light energy or photons.


Supplement

For example, the photolysis of water molecule in photosynthesis occurred under the influence of light. When photons are absorbed, it causes the hydrogen to bind to an acceptor, subsequently releasing the oxygen.


Word origin: photo + lysis
Related forms: photolytic (adjective)

Synonyms:

See also: photosynthesis


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Photolysis of water ?

http://en.wikipedia.org/wiki/Photosynthesis#Water_photolysis

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by canalon
Sat Jul 21, 2012 2:44 am
 
Forum: Cell Biology
Topic: Photolysis of water ?
Replies: 2
Views: 3368

Photolysis of water ?

Photolysis of water is described as the breaking down of water using sunlight. But how could sunlight (phoons) just breaks down water like that ? Is it helped by an enzym ??

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by prasadif
Fri Jul 20, 2012 3:30 pm
 
Forum: Cell Biology
Topic: Photolysis of water ?
Replies: 2
Views: 3368

Photorespiration

... of CO2 which leads to photorespiration. But where is the oxygen coming from for photorespiration? In my textbook it says that it is coming from photolysis during the light-dependent stage of photosynthesis. However, surely if the stomata are closed, transpiration stops and so the level of water ...

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by SheffJoe
Wed May 16, 2012 11:14 am
 
Forum: Botany Discussion
Topic: Photorespiration
Replies: 3
Views: 3708

Is the rate of photolysis in photosynthesis affected by temp

Is the rate of photolysis in photosynthesis affected by temperature? I would suggest not because it is a photochemical reaction and thus independant of temperature. How close is this to the truth?

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by jsmith613
Tue Nov 29, 2011 10:40 pm
 
Forum: Botany Discussion
Topic: Is the rate of photolysis in photosynthesis affected by temp
Replies: 2
Views: 1552
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