During cell division, actively dividing cells pass by a stage called the cell cycle in which we have a series of diving phases that are present in the following order: two gap phases (G1 and G2),which are separated by an S phase before going to the M phase. We will consider in this post each phase briefly and then talk about the most important phase which is Mitosis in a more detailed manner which will be posted on the next post.In the G1 phase, the cells are starting to prepare themselves for synthesis. However keep in mind that the chromosomes are still not duplicated
In the S phase, synthesis occurs where each chromosomes consists of two sister chromatids.
In the G2 phase, the cells start to check if there are any errors in duplication that had happened in the S phase before proceeding to the M phase.
QUESTIONS:
1) In which of these cell phases is the polymerase most active?
2) What are the different checkpoints found between these phases?
REFERENCES:
Editors. (2017). Cell Cycle - Definition, Phases, Examples, Regulation. Retrieved February 22,2019, from https://biologydictionary.net/cell-cycle/
Clear, and easy to understand. Good work!
ReplyDeleteVery concise, straightforward, and organized. Amazing!
ReplyDeleteAnswer to question 1: The polymerase is the most active during the S phase where duplication of the chromosomes occurs.
ReplyDeleteAnswer to question 2: The different checkpoints found between these phases are G1S and G2M.