The enzyme which converts glucose into ethyl alcohol is

Yeasts poison themselves to death when the concentration of alcohol reaches about $........$ (in $\%$)

Which of the following options represents the correct matching for the given lists?

List-$I$	List-$II$
$(p)$ $Clostridium$ $butylicum$	$(i)$ Vitamins
$(q)$ $Rhizopus$ $nigricans$	$(ii)$ Sterins
$(r)$ $Ashbya$ $gossypii$	$(iii)$ Steroids
$(s)$ $Monascus$ $purpureus$	$(iv)$ Butyric acid

Progesterone is produced by which of the following?

Penicillin was discovered by

Read the sentence with two blanks ($a$ and $b$): "The medicine used for patients of .....$(a)$..... is obtained from the species of organism .....$(b)$.....". Which is the correct option for the two blanks?