Question

What is the first sugar derivative obtained in dark reactions of photosynthesis?

Answer 1

This phase doesn't require direct sunlight but it depends on the products of the light reaction, i.e., ATP and NADPH beside CO2 and water that drive the process leading to the synthesis of food more accurately the sugars .

Otginally this process ia known as carbon-fixation or Photosynthesis Carbon Reduction ( PCR ) cycle.

assimilation of CO2 during photosynthesis is of two main type
i ) C3
first product of CO2 fixation is PGA ( C3 acid )

ii ) C4
First product of CO2 fixation is OAA ( C4 acid )