Questions and Answers
What is the result of genetic material replicating in the S-phase?
What is the term for the phase of the life cycle where the genetic information is duplicating?
What is the result of the centrosome duplicating?
What happens to the DNA during the S-phase?
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What is the term for the phase of the life cycle where the cell grows and prepares for mitosis?
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What is the primary function of mitosis in the life cycle of a cell?
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During which stage of the cell cycle does the cell spend most of its life?
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What is the result of the cell growing during the G2 phase?
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What is the relationship between the sister chromatids?
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What is the structure that defines the nucleus of a cell?
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What is the state of chromosomes during interphase?
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What is the result of the process of the genetic material duplicating and the cell growing?
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What is the term for the process by which the nucleus divides into two nuclei?
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What is the primary function of the cell membrane?
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What is the state of the cell during interphase?
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What is the purpose of the cytosol in a cell?
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What is the form of the chromosomes in the cell?
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Why is the centrosome drawn in the cell?
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How many chromosomes does the cell have in this example?
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What is the phase of the cell cycle where the cell grows and takes in nutrients?
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What happens to the DNA in the nucleus during the replication process?
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What are the two copies of the DNA called after replication?
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What is the term for the place where the two sister chromatids are connected?
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What happens to the sister chromatids during mitosis?
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What is the term for each individual DNA molecule after the sister chromatids are split apart?
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Why is the cell drawn with only two chromosomes?
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Study Notes
Interphase: The Life Cycle of a Cell
- Interphase is the longest stage of a cell's life cycle, where a cell grows, lives, and performs its functions.
- At some point, the cell will be ready to divide and undergo mitosis, which is the process by which the nucleus turns into two nuclei.
Cell Structure
- A cell consists of a cell membrane, cytosol, and a nucleus.
- The nucleus has a nuclear membrane and contains DNA.
- During interphase, the chromosomes are not tightly bound and are in their chromatin form, making it difficult to see with a simple microscope.
Centrosome
- A centrosome is an important organelle that will be crucial for mitosis.
- It is not to be confused with the centromere, which is the point where sister chromatids are connected.
G1 Phase
- The G1 phase is the first growth phase of interphase, where the cell grows and takes in nutrients from its environment.
- The length of the G1 phase varies depending on the cell type.
DNA Replication
- Before mitosis, the cell needs to replicate its DNA.
- During DNA replication, the genetic material is duplicated, but the number of chromosomes remains the same.
- The replicated chromosomes are called sister chromatids, connected at a centromere.
S-Phase (Synthesis Phase)
- The S-phase is the stage of interphase where DNA replication occurs.
- The genetic material is duplicated, but the number of chromosomes remains the same.
G2 Phase
- The G2 phase is the second growth phase of interphase, where the cell grows and prepares for mitosis.
- The cell has grown and the DNA has replicated, and the cell is now ready to enter mitosis.
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Description
Learn about the interphase stage of a cell's life cycle, where a cell spends most of its life. Understand the timeline of a cell's growth and its preparation for division.