Question

Cells which are not dividing are likely to be at
(a) G1
(b) G2
(c) G0
(d) S phase​

Answer 1

A cell's life cycle is referred to as the cell cycle. In other words, it's the process of growth and development steps that a cell goes through between its "birth"—the division of a mother cell—and reproduction—the division of two new daughter cells. The g1 phase, also known as the gap 1 phase or growth 1 phase, is the first of four cell cycle stages that occur during eukaryotic cell division.

Complete answer:
Cells that do not divide further exit G1 and enter the quiescent stage (G0 ) of the cell cycle, which is an inactive state. The cells at this stage are still metabolically active, but they no longer multiply unless they are triggered by an appropriate single based on the organism's needs.

As a result, option C is the correct answer i.e. G0.

A cell must perform many crucial activities in order to divide: it must grow, duplicate its genetic material (DNA), and physically split into two daughter cells. The cell cycle is an orderly and predictable series of phases in which cells fulfil various functions. The cell cycle is a cycle rather than a linear pathway because the two daughter cells can restart the process from the beginning at the end of each go-round.

The stages of the cell cycle of eukaryotic cells, or cells with a nucleus, are separated into two major phases: interphase and mitotic (M) phase. During interphase, the cell divides and duplicates its DNA. During the mitotic (M) phase, the cell splits its cytoplasm and divides its DNA into two sets, resulting in the formation of two new cells.

Let's start the cell cycle from the beginning, when a cell divides from its mother cell. What must this newborn cell do next in order to continue dividing? There are three steps to preparing for division:
In G1 phase, the cell gets physically larger, duplicates organelles, and makes the chemical building blocks it will need in following steps during this phase, also known as the first gap phase.

The cell synthesises a full copy of DNA in its nucleus during S phase. It also copies the centrosome, a microtubule-organizing structure. During the M phase, centrosomes assist in the separation of DNA.

The cell grows more, produces proteins and organelles, and begins to restructure its contents in preparation for mitosis during the second gap phase, or G2. Mitosis begins when the G2 phase ends.

Interphase is the combination of the G1, S, and G2 phases. The word inter- means "between," reflecting the fact that interphase occurs between mitotic (M) phases.

Note:-
The cytoplasm of the cell is split in two during cytokinesis, resulting in the formation of two new cells. With a little overlap, cytokinesis normally begins just as mitosis is ending. Importantly, cytokinesis occurs in animal and plant cells in distinct ways. The cell is in the G1 stage when it is prepared to divide. To accomplish this, the cell enters the S phase, during which it copies all of the DNA.