alleryAdult nerve cells and heart muscle cells most often sit in which phase?
AS phase, synthesising DNA continuously
BG0 phase, having exited the cycle
CM phase, dividing at a low background rate
DG2 phase, prepping for division
Answer & Solution
Correct answer: B. G0 phase, having exited the cycle
G0 is a non-dividing state outside the cycle.
Most adult neurons and cardiac muscle cells enter G0 after development and never divide again, which is why injury to these tissues heals so poorly.
Liver cells sit in G0 too but can re-enter if needed.
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