Why fetal cells continue to divide but terminally differentiated adult cells do not divide ?
Correct answer: A. There are many cyclin inhibitors which prevent cell to enter into S phase in adult
- A. There are many cyclin inhibitors which prevent cell to enter into S phase in adult
- B. Phosphatase absent in fetal cells
- C. Proteinase is absent in fetus
- D. Absence of CD kinase
Explanation
Terminal differentiation commonly places adult cells in a stable G0 state through cyclin-dependent kinase inhibitors that block progression into the S phase. Fetal cells retain active cell-cycle signalling, allowing continued proliferation.
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