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Rubisco

An enzyme that catalyzes the reaction that incorporates (fixes) carbon dioxide into the calvin cycle.


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Chemiosmosis

... about it as being flipped (inside-out) in comparison to mitochondria or as analogy with cristae being stroma. One more thing that came to my mind. RuBISCO is activated by increase of Mg2+ concentration. I'm not sure how this proceeds, as it was always covered in lectures simply as increase of Mg2+ ...

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by JackBean
Thu Nov 29, 2012 1:56 pm
 
Forum: Cell Biology
Topic: Chemiosmosis
Replies: 5
Views: 5538

Re: Transpiration Please help Me

... the photosynthetic rate decreases until it completely ceases through a process called photorespiration. This is due, in part, to the fact that RuBisCo (the enzyme responsible for the first step in carbon fixation) also fixes oxygen. The opening and closing of the stomata to regulate carbon ...

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by daddyjames
Sun Oct 14, 2012 2:34 pm
 
Forum: Botany Discussion
Topic: Transpiration Please help Me
Replies: 29
Views: 28226

I need some help understanding mitochondria

... the same stuff as the rest of cell - for catalysis of biochemical reactions. I doubt that majority of proteins is in mitochondria, it's not like RuBISCO in plant cells. Concentration gradient is gradient of concentration. If you do not understand to any of these words, look them up. The ATPase ...

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by JackBean
Sat Oct 06, 2012 9:53 pm
 
Forum: Cell Biology
Topic: I need some help understanding mitochondria
Replies: 1
Views: 3841

Re: Photosynthesis/carbon fixing

No, the level of rubisco carboxylase. In the first example, rubisco carboxylase is normal level and the oxygen evolution is consistently higher than CO2 uptake. In the second example, rubisco carboxylase is at 40% its normal level. ...

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by johnboy
Fri May 25, 2012 4:28 pm
 
Forum: Botany Discussion
Topic: Photosynthesis/carbon fixing
Replies: 8
Views: 4224

Photosynthesis/carbon fixing

... are three graphs. In all the graphs the oxygen levels, illumination and temperature are constant. The only variation is the level of the enzyme rubisco carboxylase which is set at normal for the first graph, 40% of normal in the second and 10% of normal in the third. The x-axis represents the ...

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by johnboy
Thu May 24, 2012 11:48 am
 
Forum: Botany Discussion
Topic: Photosynthesis/carbon fixing
Replies: 8
Views: 4224
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