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Questions and Answers
What is the correct sequence of stages in interphase of the cell cycle?
What is the correct sequence of stages in interphase of the cell cycle?
- G1, S, G2 (correct)
- S, G2, G1
- S, G1, G2
- G2, S, G1
Which stage of interphase involves the complete copying of DNA?
Which stage of interphase involves the complete copying of DNA?
- S Phase (correct)
- G2 Phase
- Mitosis
- G1 Phase
What is the main task performed by a cell during the G2 phase of interphase?
What is the main task performed by a cell during the G2 phase of interphase?
- Checking if DNA is properly copied (correct)
- Copying organelles
- Replicating chromosomes
- Preparing for cell division
Which phase of the cell cycle involves organizing and condensing genetic material?
Which phase of the cell cycle involves organizing and condensing genetic material?
What does the 'S' in S Phase refer to in the context of the cell cycle?
What does the 'S' in S Phase refer to in the context of the cell cycle?
Which phase allows cells to adjust their size according to nutrient availability and hormone signals?
Which phase allows cells to adjust their size according to nutrient availability and hormone signals?
What is the primary function of the G1 phase?
What is the primary function of the G1 phase?
Which phase immediately follows the S phase?
Which phase immediately follows the S phase?
What is the primary task of the M phase?
What is the primary task of the M phase?
Which process ensures that each daughter cell receives an identical copy of the parent cell's genetic material?
Which process ensures that each daughter cell receives an identical copy of the parent cell's genetic material?
What is the correct order of the main stages of the cell cycle?
What is the correct order of the main stages of the cell cycle?
Which phase is responsible for checking the quality of the replicated DNA?
Which phase is responsible for checking the quality of the replicated DNA?
What is the process of dividing the cytoplasm and organelles between the two daughter cells called?
What is the process of dividing the cytoplasm and organelles between the two daughter cells called?
During which phase does the cell decide whether to continue or halt the division process?
During which phase does the cell decide whether to continue or halt the division process?
What is the term used to describe the period between two consecutive M phases?
What is the term used to describe the period between two consecutive M phases?
Which phase involves the synthesis of additional enzymes and proteins required for proper cell division?
Which phase involves the synthesis of additional enzymes and proteins required for proper cell division?
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Study Notes
Cell Cycle
The cell cycle refers to the sequence of events that a cell undergoes from the moment it is formed to the point where it divides into two identical daughter cells. Throughout this process, the cell performs essential tasks such as growing, replicating its genome, and preparing for cell division. Here's a breakdown of the cell cycle, including its different phases and stages.
Phases of the Cell Cycle
The cell cycle consists of interphase and the mitotic phase. Interphase is further divided into three main stages: G1, S, and G2. During interphase, the cell grows, replicates its chromosomes, and prepares for cell division.
Interphase
G1 Phase
The cell starts interphase by preparing to divide. It grows physically larger, copies organelles, and makes the molecular building blocks it will need later. This stage also allows cells to adjust their size according to the nutrient availability and signal from other hormones.
S Phase
In this phase, the cell copies all its DNA. The 'S' stands for synthesis because during this time, each strand of double-stranded DNA acts as a template for the production of another identical strand, resulting in two complete sets of genetic material.
G2 Phase
Once the DNA has been copied, the cell moves into the G2 phase. During this period, the cell organizes and condenses the genetic material. It checks if the genetic material is properly copied and prepares itself to enter mitosis, which is the actual process of dividing.
Mitotic Phase
The mitotic phase consists of mitosis and cytokinesis.
Mitosis
During mitosis, the cell separates its DNA into two identical sets. This process involves a series of steps where the chromosomes condense, align at the center of the cell, separate, move towards opposite ends of the cell, and finally divide.
Cytokinesis
After mitosis, cytokinesis occurs where the cytoplasm divides, forming two new cells. The two daughter cells are genetically identical and each begins its own interphase to start the next round of the cell cycle.
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