If a mammalian cell completes one cell cycle in \(24\) hours and the S phase lasts \(8\) hours, what fraction of the cell cycle is spent in S phase?
Show Hint
The fraction of time spent in any phase is
\[
\boxed{
\frac{\text{Duration of the phase}}{\text{Total cell cycle duration}}.
}
\]
Here,
\[
\boxed{
\frac{8}{24}=\frac13.
}
\]