Biology Section 2.5 Flashcards
What are the 3 cell cycle stages called
Interphase, Mitosis, and Cytokinesis
What is Mitosis
Mitosis is when it takes place in 4 phase they are called Prophase, Metaphase, Anaphase, and Telophase
Explain the process of mitosis
Mitosis is the process where a cell divides to make two identical cells. It’s important for things like growth, healing, and replacing old cells. The process has 4 phases.
The result is two new cells with the same DNA as the original cell.
During which stage of the cell cycle does replication of the DNA occur?
DNA replication happens during interphase.
Why is it necessary that the cell copies its DNA?
The cell needs to copy its DNA so each new cell gets the correct genetic information
Why are chromosomes visible during mitosis but not at other times?
Chromosomes are tightly packed during mitosis, making them visible, but during other times they are loosely spread out.
Under a microscope, some cells can appear to be between metaphase and anaphase. Explain this observation.
This happens because the cell is transitioning between these stages, with chromosomes starting to separate but not fully done yet.
Which stage or phase of the cell cycle corresponds to each of the descriptions below?
A new cell wall begins to form:
The membrane of the nucleus dissolves:
Daughter chromosomes begin to separate:
The cell begins to pinch together along its middle:
Thick chromosomes threads are visible in two regions of the cell
Prophase.
Anaphase
Cytokinesis
telophase.
Biology books used to describe interphase as the “resting phase.” Based on what we know now, what was wrong with this term?
Interphase is not a “resting phase” because the cell is very active, growing and copying its DNA during this time.
