$A$ 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?

Mention the important series of events of aerobic respiration that occur in the matrix of the mitochondrion as well as one that take place in the inner membrane of the mitochondrion.

Match Column-$I$ with Column-$II$ and select the correct option.

Column-$I$	Column-$II$
$a.$ Cis-aconitate	$i.$ $4 \ C$-compound
$b.$ $\alpha$-ketoglutarate	$ii.$ $3 \ C$-compound
$c.$ Fumarate	$iii.$ $6 \ C$-compound
$d.$ $1,3$-diphosphoglyceric acid	$iv.$ $5 \ C$-compound

Choose the correct option:
$(1)$ Sucrose is converted into glucose and fructose with the help of the enzyme $Invertase$ / $Maltase$.
$(2)$ In fermentation,glucose is converted into ethanol by yeast under $Aerobic$ / $Anaerobic$ conditions.

Select the correct option to complete the following statements:
$(1)$ The $TCA$ cycle begins with the condensation of $OAA$ and water with $Acetyl-CoA$ to yield $Citric$ $acid$.
$(2)$ In fermentation,yeast converts glucose into ethanol under $Anaerobic$ conditions.

Which of the following cells may show turgidity?