Answer:
P 16
Explanation:
P 16 does not appear to play a role in blocking cell cycle entry by fibroblast. cyclin dependdent kinase (CDK) promotes cell cycle progression thus inhibitors of CDK inhibit cell cycle. In graph, it has been shown that in absence of p 16 there is no increase in DNA Content but when others are absent ,DNA CONTENT IS MORE.
Answer:
Because it does. No other answer. This is one of those Impossible to Answer questions from college.