Question

How many times calvin cycle is driven to produce 3 glucose molecules ?
2
4
6
8

Answer 1

@beccaboo333

Answer 2

@Compassionate @ranga

Answer 3

Well the last enzyme working on the calvin cycle before regeneration is the glyceraldehyde 3-phopshate dehydrogenase, which we from the glycolysis remember create 1,3-bisphosphorglycerate from glyceraldehyde 3-phosphate. The calvin cycle catalyze the revers reaction thereby creating glyceraldehyde 3-phosphate using NADPH.

Okay, now we remember that glyceraldehyde 3-phosphate is a C3 sugar, the remaining 5 produced from RUBISCO are used in the regeneration of ribulose 1,5-bisphosphate. Leaving the cycle to run one more time we get to produce 2 glyceraldehyde 3-phosphate using an aldolase we get to produce a C6 sugar (think about which one, from the glycolysis), which can then enter the glucogeogenesis.

Credits goes partly to @shrutipande9 for the help creating this answer.

Answer 4

And @Frostbite if Each cycle formed the half of glucose so 6 form 3 glucose
???

Answer 5

Well you only need 2 rounds. each round create a 3C sugar. 3C + 3C = 6C using the aldolase.

Answer 6

Oh got it its 2 . Thank you so much @Frostbite and @shrutipande9 ^_^

Answer 7

oh wait sorry I did not read correctly.

Answer 8

Yes you are correct. 2 times 3

Answer 9

then ? O.o

Answer 10

she is right 2 rounds for 1 glucose....so 6 for 3 glucose molecules

Answer 11

Ok its 6 ^_^

Answer 12

I got selective eyes. I only read every second word :P

Answer 13

it would be really wise to count how many carbons are processed in each part of the cycle, from there you would know how many glucose can be made out, then the rest is algebra