Where is sugar made in photosynthesis?

1 Answer
Feb 23, 2018

Glucose is the basic sugar produced during photosynthesis in stroma part of chloropast.

Explanation:

Photosynthesis is the process in which green plants synthesize glucose from simple substances like carbon dioxide and water in presence of light.

It consists of 2 steps: Light reaction or Hill's reaction and Dark reaction or Blackmann's reaction.

Light reaction occurs in granum part of chloroplast where chlorophyll pigment is present. Chlorophyll entraps solar energy from light and converts that energy into chemical energy in the form of ATP.

This generation of ATP, utilizing solar energy is termed photo-phosphorylation. In addition to ATP formation, reducing power in the form of NADPH +H is formed during photolysis of water.

Dark reaction occurs in stroma part of chloroplast. It can occur independent of light, but is dependent upon the end product of light reaction, i.e. ATP and reducing power in the form of NADP+H.

Dark reaction thus must be preceded by light reaction. Dark reaction simply involves reduction of carbon dioxide into glucose molecule, utilizing reducing power (NADPH+H) and ATPs produced during light reaction. It occurs in a series of steps, which together constitute Calvin cycle.

Glucose, the basic sugar is thus produced in stroma part of chloroplast as explained above.