Question

Beginning with carbon fixation, arrange the steps of the Calvin cycle in the correct order.

Answer 1

Answer:

1. Carbon dioxide reacts with a 5-carbon compound
2. formation of an unstable 6-carbon compound
3. formation of a stable 3-carbon compound  
4. use of ATP to form a high-energy 3-carbon compound
5. use of enzyme and ATP to form 5-carbon compound
6. formation of glucose, which leaves the chloroplast  

Explanation:

During Calvin cycle a CO2 molecule reacts with a 5-carbon compound, ribulose-1, 5-bisphosphate (RuBP) to form a 6-carbon unstable compound which splits into two molecules of 3-carbon stable compound, 3-phosphoglyceric acid (3-PGA). With the help of ATP and NADPH, the 3-PGA molecules form a high-energy 3-carbon compound, 3-phosphoglyceraldehyde (3-PGAL). Some molecules of the 3- phosphoglyceraldehyde (3-PGAL) are used to regenerate 5-carbon, ribulose-5- phosphate and some of the molecules of 3- phosphoglyceraldehyde (3-PGAL) are used to form glucose.

Answer 2

1.formation of glucose, which leaves the chloroplast
2.formation of a stable 3-carbon compound
3.formation of an unstable 6-carbon compound
4.use of ATP to form a high-energy 3-carbon compound