Agarose is extracted from which of the following?

Which enzyme is used to synthesize a $cDNA$ probe from a messenger $RNA$ molecule?

Given below are two statements:
Statement $I$: Plasmids are autonomously replicating $DNA$.
Statement $II$: Plasmids are extrachromosomal $DNA$.
In the light of the above statements, choose the correct answer from the options given below:

Which of the following is used as a recombination vector?

$A$ gene library or $DNA$ library contains a collection of:

Differentiate between Restriction Endonuclease and Restriction Exonuclease.