Photosynthesis is a $..............$ process.

$A$ : Most of the photosynthesis takes place in the blue and red regions of the spectrum.
$R$ : Action spectrum shows the amount of energy of different wavelengths of light absorbed by pigments.

Which one of the following categories of organisms does not evolve oxygen during photosynthesis?

$A-$ In stroma,enzymatic reactions synthesize sugar which in turn forms starch.
$R-$ The membrane system of chloroplast is responsible for trapping the light energy and also for the synthesis of $ATP$ and $NADPH$.

Photosynthesis is a

In which of the following aspects do photosynthetic bacteria differ from green plants?