Questions and Answers
What happens during the life of a cell?
The cell cycle consists of two main phases, interphase and mitosis.
Where do cells come from?
All living things come from pre-existing cells.
What must occur inside a cell before cell division can occur?
The cell must be in an environment where it can grow and obtain enough energy.
What are the three major phases of the cell cycle?
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What are the 3 phases of interphase?
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Describe the process of semi-conservative replication.
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What is a replication fork?
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What does the M in the 'M phase' stand for?
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What are the 4 parts of mitosis?
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What happens during prophase?
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What happens during metaphase?
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Study Notes
Cell Cycle Overview
- The cell cycle consists of interphase and mitosis, with cytokinesis following mitosis.
- Interphase prepares the cell for mitosis, involving energy acquisition and chromosome duplication.
- Interphase is divided into G1 phase, S phase, G2 phase, and the G0 phase.
Interphase Phases
- G1 Phase: Follows cell division, characterized by cell growth and production of proteins and organelles. Cells evaluate their ability to divide; if unable, they may enter the G0 phase.
- S Phase: Marked by DNA replication, where each chromosome is duplicated.
- G2 Phase: The final preparation for mitosis occurs, with synthesis of proteins and other molecules required for division.
Mitosis and Cytokinesis
- Mitosis involves dividing one cell into two daughter cells, typically encompassing four stages: prophase, metaphase, anaphase, and telophase.
- Cytokinesis is the concurrent process where the cytoplasm divides, resulting in distinct daughter cells.
Key Definitions
- Cell Theory: States that all living things originate from pre-existing cells, emphasizing cellular continuity.
- Semi-Conservative Replication: Refers to the DNA replication method where the original strands separate and serve as templates for new strands.
- Replication Fork: The specific region where DNA replication occurs.
- M Phase: Stands for mitosis, the cell division process.
Mitosis Stages
- Prophase: Chromosomes condense into recognizable structures, with each chromosome consisting of two identical sister chromatids; spindle fibers start forming, and the nuclear envelope begins to break down.
- Metaphase: Chromosomes align at the metaphase plate, preparing for separation.
Cell Division Requirements
- Cells must be in a suitable environment to grow and must duplicate all components before division can commence.
This structured overview highlights key aspects of the cell cycle, ensuring a comprehensive understanding of cellular processes involved in growth and division.
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Description
This quiz explores the key concepts of the cell cycle, emphasizing the phases of interphase and mitosis. Discover how cells prepare for division and the processes involved in cytokinesis. Test your understanding of cellular life and division!
