What takes place during the G1 phase of the cell division?

 

Solution: G1 is the longest stage of cell cycle in which cell incorporates RNAs, proteins and other biomolecules for cell development and consequent replication of DNA. G1 stage closes when the cell moves into the S stage of interphase. Whereas in G1-stage, blend of RNAs, protein and other biomolecules for shaft arrangement takes put.

Hence, the correct answer is option 1.