Light independent reaction question help!

Hello,
Okay so I know how to draw out the Calvin cycle and everything makes sense with the conversions and the reductions but I don't know how to structure it into a paragraph to use as a model answer.

So I was wondering if anyone knew where I could find one or if they could help me with formulating one?

For reference, I am doing AQA biology. :smile:

Reply 1

Lattae

Could you explain it to me!!! I am trying to revise this topic, but none of this makes sense to me....

Reply 2

Ayes7288

Original post by Lattae

Could you explain it to me!!! I am trying to revise this topic, but none of this makes sense to me....

yeah sure, so RuBP (ribulose bisphosphate) is a 5 carbon molecule that combines with CO2 with the help of the enzyme Rubisco to form 2 molecules of a 3 carbon molecule called Glycerate Phosphate (I'm gonna write GP for short). Then GP is converted into TP (triose phosphate) via a reduction reaction using the hydrogen from the NADPH produced at the end of the light dependent reaction. ATP that was formed in the LDR is also hydrolysed to provide energy for this reduction to take place. TP is formed and some of it is converted into useful organic substances such as glucose or lipids however most of the TP molecules are used in the reformation of RuBP. This process of forming also requires the hydrolysis of ATP into ADP and Pi. 6 cycles of the Calvin cycle need to occur to synthesize one molecule of glucose!

That's the whole cycle. Hope this helped :smile:

Reply 3

Lattae

OMG! This makes so much more sense now. Thankyouuuu😍