Consider the life cycle of a cell. when the memory cells of the immune system are not activated or responding to a pathogen exposure, what phase of the cell cycle are they likely in? justify your reasoning

Ans.

Memory cells of immune system are present in G0 phase, in which these cells are not activated or responding for a pathogen.

The cell-cycle is defined as the series of events that lead to DNA duplication and division of a cell to form daughter cells. The cell cycle is divided into interphase and M phase.

The interphase includes gap 1 (G 1) phase, S or synthesis phase, and gap 2 (G 2) phase, while M phase includes karyokinesis and cytokinesis.

The cells after M phase either goes for next cell division or G1 phase or for G 0 (gap 0) phase. The G0 phase is resting phase, in which cells show a quiescent state.

As memory cells are present in resting phase, till the next exposure of same antigen, these cells are in G0 phase of cell cycle.

It should be noted that the phase of the cell cycle are they likely in is the GO phase.

It should be noted that the memory cells of immune system are present in G0 phase.

In this case, these cells are not activated or responding for a pathogen.

Since the memory cells of the immune system are not activated or responding to a pathogen exposure, it's in the GO phase.

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