Which of the following plants can show the $CAM$ cycle?

Photosynthesis occurs in .......

Read the following and choose the option containing the correct pair:
$I.$ $DCMU$: Herbicide,Inhibitor of non-cyclic electron transport
$II.$ $PMA$: Fungicide,Reduces transpiration
$III.$ Colchicine: Alkaloid,Causes male sterility
$IV.$ Soilrite: Sodium alginate,Encapsulation of somatic embryos

The energy of a mole of light quanta is $72 \ kcal$ in the blue region at $400 \ nm$ and $41 \ kcal$ in the red region at $700 \ nm$. How much light energy would be required under standard conditions to make $1 \ mole$ of glucose costing $686 \ kcal$?

In which of the following is light energy stored in the form of chemical energy?

Give differences between:
$(1)$ Grana and Stroma
$(2)$ $PS-I$ and $PS-II$