Which type of vaccine is produced from yeast?

The Indian Parliament cleared which amendment of the Indian Patent Bill, which is significant in the context of biotechnology and intellectual property rights?

Given below is the sequence of events in the production of human insulin by Eli Lilly.
$(a)$ Preparation of two $DNA$ sequences corresponding to chain $A$ and $B$ of human insulin.
$(b)$ Production of chain $A$ and $B$ separately.
$(c)$ Introduction of chains in plasmids of $E. coli$.
$(d)$ Extraction of chain $A$ and $B$ and combining them by creating disulphide bonds.
Choose the correct sequence of events.

The vaccine for Hepatitis-$B$ is produced from ...........

From which organism was insulin extracted in earlier times?

Which type of bond connects the $A$ and $B$ chains of human insulin?