Read the following statements regarding the quiescent stage ( G ₀ ) of the cell cycle: (I) Cells that do not divide further exit G ₁ phase to enter the G ₀ phase. (II) Cells in the G ₀ phase are metabolically inactive. (III) Heart cells in adult animals are an example of cells that enter the G ₀ phase. (IV) Cells in the G ₀ phase can never proliferate again under any circumstances. How many of the given statements ar

Step-by-step solution

According to NCERT, cells that do not divide further exit the G ₁ phase to enter an inactive stage called the quiescent stage ( G ₀ ). Thus, statement (I) is correct. Cells in this stage remain metabolically active, making statement (II) incorrect. Heart cells in adult animals do not exhibit division and are a classic example of cells in the G ₀ phase, so statement (III) is correct. These cells no longer proliferate unless called on to do so depending on the requirement of the organism. Therefore, they can divide a