Describe the phases of the cell cycle and the events that characterize each phase.

Question

Accepted Answer

Hi everyone. Let's take a look at this practice problem together. The eukaryotic cell cycle consists of four distinct phases G one, S. G two and M. Phase respectively. Which of the following statements is true based on the phases of the cell cycle. Now, before we take a look at the statements, let's review the sales cycle. So here we have the way it's typically represented and that's what the circle. So it starts off at G one. Then you have S. Phase G two and the M phase G one Through G two are considered interface, NG1 You have cell growth, that's happening s phases where DNA replication occurs. And then in G. two you get further cell growth And m phases where mitosis occurs and the cell divides. And so now that we review that, let's take a look at our statements, we have one in the G1 phase. The cell increases its supply of proteins, increases the number of organelles such as mitochondria and ribosomes and grows in size. That is all true. So statement one is true. Now let's look at statement to in the S phase the play D. And number of chromosomes are unchanged. Hence the amount of D. N. A is also unchanged. Now this is a false statement recall that an S phase DNA replication occurs. And so the amount of D. N. A. Is increasing. So too is false statement three states during the G two phase micro tubules begin to reorganize to form a spindle or pre pro phase. This is also true. This is where cell growth occurs and the cell is getting ready for mitosis. And so this is also a true statement. So we are looking for the answer where one in three are true and two is false, Which is going to be option B. Alright, everyone. I hope you found this helpful and I'll see you soon for the next practice problem.

Describe the phases of the cell cycle and the events that characterize each phase.

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Key Concepts

Phases of the Cell Cycle

Events in Interphase

Mitosis and Cytokinesis