During photosynthesis,which of the following processes occurs?

$A -$ Calvin cycle starts with the carboxylation of $RuBP$.
$R -$ Photorespiration starts with the oxygenation of $RuBP$.

$RuBP$ carboxylase,$PEPcase$,pyruvate dehydrogenase,$ATPase$,cytochrome oxidase,hexokinase,lactate dehydrogenase. Select/choose enzymes from the list above which are involved in $(a)$ Photosynthesis $(b)$ Respiration $(c)$ Both in photosynthesis and respiration.

Photosynthesis is:
$I.$ Endergonic process
$II.$ Exergonic process
$III.$ Chemical process
$IV.$ Physical process
Select the correct option.

Green plants and green sulphur bacteria,which prepare their organic food themselves with the help of sunlight,are known as:

Choose the correct pair: