Question

The products of the light dependent reactions are

• A. O${}_2$, NADPH${}_2$ and ATP
• B. H${}_2$O, NADPH${}_2$ and ATP
• C. Glucose, ATP and O${}_2$
• D. CO${}_2$, H${}_2$O and NADPH
• E. O${}_2$, CO${}_2$ and H${}_2$O

Answer 1

The correct option is A O${}_2$, NADPH${}_2$ and ATP

Light reaction occurs in the thylakoid membrane of the chloroplasts. It involves cyclic and non cyclic photophosphorylation. Photophosphorylation is the production of ATP from ADP and H₃PO₄ in presence of light and chlorophyll-a during the photochemical phase of photosynthesis.

During cyclic photophosphorylation, ATP is produced and in non cyclic photophosphorylation, ATP and NADPH₂ are produced. Oxygen is also formed as a result of photolysis of water.

Hence, the products of light reaction are ATP, NADPH₂ and O₂.

So, the correct answer is 'O₂, NADPH₂ and ATP'.