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Cell Cycle

Grade 6 Science Worksheets

The cell cycle is the series of events that a cell goes through as it grows and divides into two daughter cells. It consists of two main stages: the interphase and the mitotic phase.

In this article, you will learn about the Cell Cycle & its stage: interphase and the mitotic phase.

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Interphase

Interphase is the longest stage of the cell cycle and is divided into three sub-stages: G1, S, and G2.

  • G1 (Gap 1): During G1, the cell grows and carries out normal cellular activities, such as protein synthesis and metabolic processes. The cell also checks for DNA damage and ensures that it has enough resources to proceed with replication. Cell organelles also duplicate in this phase.
  • S (Synthesis): During S, DNA replication occurs. This stage is characterized by replicating the cell’s DNA in preparation for cell division. DNA replication is a complex process involving the unwinding of the double-stranded DNA helix and separating the two strands.
  • G2 (Gap 2): During G2, the cell checks for DNA damage that might have occurred during replication. If the cell finds damage, it can repair the DNA before entering mitosis. The cell also ensures that the chromosomes are properly replicated and ready for division. The protein and enzyme are responsible for cell division and spindle formation synthesize in this phase.

Interphase is an essential stage in the cell cycle as it provides the cell with the necessary resources and information to ensure proper cell division. The cell checks for DNA damage and makes repairs replicates its DNA and prepares for the next stage of cell division. Any errors or problems in this stage can lead to abnormal cell division and potentially cause serious health problems.

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Mitotic Stage

The mitotic stage is the stage of the cell cycle in which a cell divides into two daughter cells. This stage is characterized by the division of the cell’s chromosomes and cytoplasm. The mitotic stage consists of four main stages: prophase, metaphase, anaphase, and telophase.

  • Prophase: During prophase, the chromatin condenses into visible chromosomes. The chromosomes become thicker and more easily visible under a microscope. The spindle fibers, made up of microtubules, begin forming and attaching to the chromosomes. The nuclear membrane also gets dissolved in the cytoplasm.
  • Metaphase: During metaphase, the chromosomes align at the center of the cell. This is accomplished by the spindle fibers, which pull the chromosomes to the center of the cell. The chromosomes line up in a single plane, called the metaphase plate. This is the best phase to study the chromosome’s structure.
  • Anaphase: During anaphase, the chromosomes separate and move to opposite poles of the cell. The spindle fibers pull the chromosomes apart, separating them into two sets.
  • Telophase: The cell membrane pinches inward during telophase, forming two separate daughter cells. The chromosomes begin to decondense and become less visible as the new cell membranes form.
  • Cytokinesis is the final stage of the mitotic phase, where the division of the cytoplasm is completed to form two separate daughter cells. 

The mitotic stage is a tightly regulated process that ensures proper chromosome segregation and equal distribution of genetic material to the daughter cells. Any errors or disruptions during the mitotic stage can lead to chromosomal abnormalities and potentially cause serious health problems.

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Cell Cycle FAQS

What is the cell cycle?

The cell cycle is the series of events that occur in a cell leading to its division and duplication of its DNA to produce two daughter cells.

What are the phases of the cell cycle?

The cell cycle consists of four main phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and the division phase(Mitosis and Meiotic).

What happens during the G1 phase of the cell cycle?

During the G1 phase, the cell grows and performs normal metabolic functions.It duplicates cell organelle except for nucleus for cell divison.

What happens during the S phase of the cell cycle?

During the S phase, the cell replicates its DNA.

What happens during the G2 phase of the cell cycle?

During the G2 phase, the cell continues to grow and prepare for mitosis.

What happens during the M phase of the cell cycle?

During the M phase, the cell divides its genetic material and cytoplasm to produce two daughter cells.

What is mitosis?

Mitosis is the process of cell division in which the nucleus of a cell divides into two identical nuclei.

What are the stages of mitosis?

The stages of mitosis are prophase, metaphase, anaphase, and telophase.

What is the purpose of the cell cycle?

The purpose of the cell cycle is to produce new cells for the growth, repair, and replacement of damaged or dying cells in the body.

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