Question

(a) Based on the given data for the groups of cells cultured with 0.1% serum (groups 3 to 7), identify which of the four proteins tested do (does) not appear to play a role in blocking cell cycle entry by fibroblasts.

Answer 1

Answer:

The correct answer is "p18, p21 and p27".

Explanation:

In this experiment, four proteins were blocked and the level of DNA replication was tested in different cell cultures to see which proteins may play a role in cell cycle. Based on the given data we can conclude that p16 is the only protein that appear to have a pivotal role in cell cycle, while p18, p21 and p27 apparently does not. We can conclude this by observing group 7 of cells, were cells have only p16 active and were able to have around 80% of DNA replication.