The enzyme ribose-5-phosphate isomerase catalyzes the conversion between ribose-5-phosphate (R5P) and ribulose-5-Phosphate (Ru5P) through an enediolate intermediate. In the Calvin Cycle, Ru5P is used to replentish ribulose-1.5 bisphosphate, a substrate for rubisco.
For the conversion of R5P to Ru5P, if delta G0' =0.460 kJ/mol and delta G= 4.12 kJ/mol, calculate the ratio of Ru5P to R5P at 298 K.
Hint: Delta G= Delta G0'+RTln(Ru5P/R5P)
Which of the following statements are true:
1.) this reaction is not favorable, and is not likely regulated
2.) This reaction is favorable, and is not likely regulated
3.) This reaction is not favorable, and is likely regulated
4.) This reaction is favorable, and is likely regulated.