What is the importance of respiration in plants?

$A$ student has taken a twig from a plant. She/he observes a droplet of fluid exuding from the cut surface of the twig. What is this fluid?

Select the correct statements from the following:
$I-$ During respiration,plants take in $CO_2$ and release $O_2$.
$II-$ The surface of most cells in plants is in contact with air.
$III-$ The loose arrangement of parenchyma cells in leaves,stems,and roots creates a network of air spaces.
$IV-$ The energy released during respiration is stored in the form of $ATP$.
$V-$ Glucose is oxidized to release energy in only a single step.

Choose the incorrect sentence.

When a man enters a seed godown,the feeling is that of

Match the name of the scientist or discovery with its corresponding pathway or process:

$A$. $PPP$ (Pentose Phosphate Pathway)	$i$. Kuhne pathway
$B$. Demonstration of fermentation	$ii$. Kreb's cycle
$C$. $TCA$ cycle	$iii$. Warburg-Dickens pathway
$D$. Glycolysis	$iv$. Embden-Meyerhof-Parnas pathway

Choose the correct matching sequence: