Choose the incorrect statement with respect to photosynthesis.

Which of the following statements is/are not true?
$I.$ In $CAM$ plants,stomata open during dark and remain closed during the day.
$II.$ Role of $Na^+$ in stomatal opening is now universally accepted.
$III.$ The water potential of root cells is higher than the water potential of soil.
$IV.$ Capillarity theory is the most accepted theory of water movement through plants.
$V.$ The walls of xylem vessels made up of ligno-cellulose have strong affinity for water molecules.

All the energy for living organisms comes as radiation in the form of......from the sun and is captured by.......

Consider the following statements regarding photosynthesis and respiration in plants and select the correct option.
$I$. RuBisCO has high affinity to oxygen in low $CO_2$ concentration.
$II$. The Calvin pathway occurs in the chloroplast of bundle sheath cells of $C_4$ plants.
$III$. Yeast poison themselves when the concentration of alcohol reaches $7\%$.
$IV$. Oxygen is a final hydrogen acceptor during aerobic respiration.

Analogy type question:
$(1)$ Biosynthetic phase : Based on $CO_2$ and $H_2O$ :: Phosphorylation : ......
$(2)$ First product of $C_3$ cycle : $PGA$ :: First product of $C_4$ cycle : ......

$A$ small mesophytic twig with green leaves is dipped into water in a big beaker under sunlight. It demonstrates