The conversion of PGA to PGAL during Calvin cycle is a process of

• a) Reduction
• b) Oxidation
• c) Hydroxylation
• d) Isomerization

The conversion of PGA (3-phosphoglycerate) to PGAL (glyceraldehyde-3-phosphate) during the Calvin cycle is primarily a reduction process.

Key Concepts

• PGA (3-phosphoglycerate): A three-carbon molecule formed in the Calvin cycle.
• PGAL (glyceraldehyde-3-phosphate): A three-carbon sugar that is produced from PGA.
• Reduction: A chemical reaction where a molecule gains electrons or hydrogen, often resulting in a decrease in oxidation state.

Why It's Reduction

During this step, PGA is reduced by the addition of electrons, which are provided by NADPH, a key molecule in the photosynthesis process. This transformation is crucial for the synthesis of carbohydrates in plants.

Summary

In summary, the correct answer to the question is a) Reduction.