What is the quiescent stage () of the eukaryotic cell cycle?

Answer and explanation

Correct answer: C. A metabolically active stage where differentiated cells suspend division without exiting the living state

  1. Step 1: In adult multicellular organisms, many differentiated cells (such as cardiac myocytes and mature neurons) do not divide regularly.
  2. Step 2: These cells exit the phase and enter an inactive vegetative stage called the quiescent stage ().
  3. Step 3: Cells in remain fully metabolically active and can perform specialized physiological functions, and some (like hepatocytes) can re-enter upon tissue injury.
Answer
A metabolically active stage where differentiated cells suspend division without exiting the living state.
Why not the others: Rapid DNA replication occurs in S phase; Irreversible phase leading to necrosis describes cell death, not ; Mitotic arrest caused by poisons is M-phase arrest (e.g., colchicine arrest).

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