Which of the following is a mitotic poison?

$A$ bacterium divides every $35$ minutes. If a culture containing $10^5$ cells per $ml$ is grown for $175$ minutes,what will be the cell concentration per $ml$ after $175$ minutes?

Match List-$I$ with List-$II$ :

List-$I$ (Phase of cell cycle)	List-$II$ (Activity)
$A$. $G_1$ phase	$I$. Actual cell division occurs
$B$. $S$ phase	$II$. Cell is metabolically active and continuously grows but does not replicate its $DNA$
$C$. $G_2$ phase	$III$. Synthesis of $DNA$ occurs and the amount of $DNA$ per cell doubles
$D$. $M$ phase	$IV$. Proteins are synthesized while cell growth continues

Choose the correct answer from the options given below :

During which phase do the centromeres lie on the equatorial plate and the arms point towards the poles?

White blood corpuscles divide by

During which phase does protein synthesis occur?