Question

why is g1 important?
without this process, cells would never completely divide into two cells.
without this process, youd end up with two tiny and ineffective cells.
without this process, new cells would not have their own copy of dna.
without this process, cells would never stop dividing.

Explanation:

G1 phase is part of the cell cycle. In this phase, the cell grows in size, synthesizes mRNA and proteins. If a cell skips G1 phase, it won't grow properly. When cell division occurs (like mitosis), without proper growth in G1, the resulting daughter cells would be tiny and not function effectively.

• The first option is wrong because the process that ensures complete division into two cells is cytokinesis (in mitosis) not G1.
• The third option is wrong because the process that ensures new cells have their own DNA copy is DNA replication (in S - phase).
• The fourth option is wrong because the regulation of cell - division stopping is more related to cell - cycle checkpoints in general and not specifically G1 in the context of "cells never stop dividing".

Answer:

Without this process, you'd end up with two tiny and ineffective cells.