Answer:
p18, p21 and p27
Explanation:
Four proteins have been obstructed in this investigation and the concentration of DNA synthesis was evaluated in various cell cultures and seeing which proteins could play a significant role in the cell cycle.
The correct answer is...Once the enzyme binds to the specific substrate molecule, subtle structure changes occur in the active site, which are reverted when the reaction is over.
Hope this helps:)
The answer is programmed cell death