Question

mitosis has five stages: prophase, metaphase, anaphase, and telophase. after completing mitosis or m-phase the cell enters cytokinesis.
check point 3
cytokinesis is the final major event in the cell cycle. during this phase the cells cytoplasm is divided including all of the important organelles.

name one thing cells do as a part of interphase.

does mitosis occur in prokaryotic cells? why or why not?

describe each step that must occur during the s phase to replicate dna.

predict what would happen if the cell cycle did not have checkpoints.

list each phase of the cell cycle and write a brief description of what is happening at each.

how many checkpoints are in the cell cycle process?

Explanation:

Identify interphase activities

During interphase, cells grow, replicate their DNA, and prepare for cell division. A primary activity is DNA replication or cellular growth (G1, S, G2 phases).

Analyze mitosis in prokaryotes

Mitosis does not occur in prokaryotic cells because they lack a nucleus and membrane-bound organelles. Instead, they divide by binary fission.

Outline S phase DNA replication

DNA replication in S phase involves:

1. Unwinding of the double helix by helicase.
2. Synthesis of RNA primers by primase.
3. Elongation where DNA polymerase adds complementary nucleotides.
4. Ligation where DNA ligase joins Okazaki fragments.

Evaluate cell cycle checkpoints

Without checkpoints, cells would divide uncontrollably with damaged or mutated DNA, leading to genetic instability, cell death, or cancer.

Describe cell cycle phases

The cell cycle phases are:

1. Interphase (G1, S, G2): Cell growth, DNA replication, and preparation for division.
2. M Phase (Mitosis and Cytokinesis): Nuclear division followed by cytoplasmic division.

Count cell cycle checkpoints

There are three major checkpoints in the cell cycle: the G1 checkpoint, the G2 checkpoint, and the M (spindle) checkpoint.

Answer:

Question 1

Name one thing cells do as a part of interphase.
<blank>Replicate their DNA</blank>

Question 2

Does mitosis occur in prokaryotic cells? Why or why not?
<blank>No, because prokaryotic cells lack a nucleus and membrane-bound organelles; they divide by binary fission instead.</blank>

Question 3

Describe each step that must occur during the S phase to replicate DNA.
<blank>1. Helicase unwinds the DNA double helix. 2. Primase places RNA primers. 3. DNA polymerase synthesizes new complementary strands. 4. DNA ligase seals the fragments together.</blank>

Question 4

Predict what would happen if the cell cycle did not have checkpoints.
<blank>Cells would divide uncontrollably with damaged, mutated, or incomplete DNA, which can lead to cancer or cell death.</blank>

Question 5

List each phase of the cell cycle and write a brief description of what is happening at each.
<blank>1. Interphase: The cell grows (G1), replicates its DNA (S), and prepares for division (G2). 2. M Phase: The cell divides its duplicated chromosomes (Mitosis) and splits its cytoplasm (Cytokinesis).</blank>

Question 6

How many checkpoints are in the cell cycle process?
<blank>Three (G1, G2, and M checkpoints)</blank>