Multiple Choice
What external stimulation is required by mammalian cells to progress through the cell cycle prior to reaching the restriction point?
A) presence of steroid hormones in their culture medium
B) presence of Na+ ions in their culture medium
C) presence of growth factors in their culture medium
D) no external stimulation is required
E) presence of vitamins in their culture medium
Correct Answer:
Verified
Correct Answer:
Verified
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