Do reaction of photosynthesis called, as 'Dark Reaction' need light? Explain.

Dark reaction in photosynthsis is called so because

Which products formed during the light reaction of photosynthesis are used to drive the dark reaction?

Explain Etard Reaction.

In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the followings: If chlorophyll-a is responsible for light reaction of photosynthesis, why do the action spectrum and absorption spectrum not overlap?

During light reaction of photosynthesis, how many photons are required for evolution of one O_2 ?

What is link reaction? Explain.

Why is photosynthesis considered to by a redox reaction?

Heating of sugar is called a ___reaction