16 Questions
What is the correct sequence of stages in interphase of the cell cycle?
G1, S, G2
Which stage of interphase involves the complete copying of DNA?
S Phase
What is the main task performed by a cell during the G2 phase of interphase?
Checking if DNA is properly copied
Which phase of the cell cycle involves organizing and condensing genetic material?
G2 Phase
What does the 'S' in S Phase refer to in the context of the cell cycle?
Synthesis
Which phase allows cells to adjust their size according to nutrient availability and hormone signals?
G1 Phase
What is the primary function of the G1 phase?
To increase the cell's size and mass
Which phase immediately follows the S phase?
G2 phase
What is the primary task of the M phase?
Equal distribution of chromosomes to daughter cells
Which process ensures that each daughter cell receives an identical copy of the parent cell's genetic material?
Mitosis
What is the correct order of the main stages of the cell cycle?
G1 → S → G2 → M
Which phase is responsible for checking the quality of the replicated DNA?
G2 phase
What is the process of dividing the cytoplasm and organelles between the two daughter cells called?
Cytokinesis
During which phase does the cell decide whether to continue or halt the division process?
G1 phase
What is the term used to describe the period between two consecutive M phases?
Interphase
Which phase involves the synthesis of additional enzymes and proteins required for proper cell division?
G2 phase
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.
Explore the cell cycle, a series of events that a cell undergoes from formation to division, including its key phases and stages such as G1, S, G2, mitosis, and cytokinesis. Learn about the processes involved in growth, DNA replication, and cell division.
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