In $1928$,a scientist discovered the first effective antibiotic. Who was the scientist and what was the antibiotic?

Ethyl alcohol is commercially manufactured from

Select the microbe which is the source of 'clot buster' enzyme.

Yeast is used in the production of .......

Name an immunosuppressive agent.

$A$ brewery subjects about $1$ tonne of purified jaggery to fermentation under ideal conditions. If it has produced $0.3$ tonne of alcohol, what quantity of $CO_2$ has it expelled into the atmosphere (in $tonne$)?