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What are the five main phases of the cell cycle and explain what occurs during each phase?
Wiki User
∙ 8y ago
The 4 phases of a typical cell cycle and the events occurring during each phase are outlined:
1. Mitotic phase (or) M phase:
This is the initial stage when cells prepare for and then undergo the process of cytokinesis. M phase is simply termed as 'mitosis' also. During mitosis the chromosomes are paired and then divided prior to cell division. The events in this stage of the cell cycle leading to cell division are prophase, metaphase, anaphase and telophase. All these four stages have their own significance.
2. G1phase:
This stage corresponds to the gap in the cell cycle which follows cytokinesis. During this phase, the cells make a decision to either exit the cell cycle or become dormant or terminally differentiated or to continue dividing.
Terminal differentiation is identified as a non-dividing state for a cell. Dormant and terminally differentiated cells are identified as being in G0phase. Cells in G0 can remain in this state for extended periods of time without division.
Specific stimuli may induce the G0 cell to re-enter the cell cycle at the G1 phase or alternatively may induce permanent terminal differentiation.
During G1 phase, cells begin synthesizing all the cellular components needed in order to generate two identically complimented daughter cells. As a result the size of cells begins to increase during G1.
3. S phase:
This is an important stage of the cell cycle during which the DNA is replicated. This is the DNA synthesis phase. Additionally, some specialized proteins like histones are also synthesized during S phase.
4. G2 phase: This is the final stage after the completion of DNA replication.
During G2 phase,
i. Chromosomes begin to condense
ii. Nucleoli disappear
iii. Spindle pores are produced.
Typical eukaryotic cell cycles take up approximately 16 - 24 hrs when grown in culture. However, in the context of the multicellular organization of organisms the cell cycles can be as short as 6 - 8 hrs to as much greater as 100 days.
The G1 phase of the cycle leads to this high variability of cell cycle durations. Source: www.examville.comWiki User
∙ 14y ago
Wiki User
∙ 8y agoInterphase: The growth and development of the cell.
Prophase: The chromatids pair up, nuclear membrane dissolves & centrioles & spindle fibers go to opposite ends.
Metaphase: The paired chromatids (chromosomes) line up in the center of the cell.
Anaphase: The chromosomes separate by the spindle fibers pulling them apart.
Telophase: The nuclear membrane forms & gets ready for division.
Wiki User
∙ 8y agoCytokinesis- the division of the cells cytoplasm
Mitosis- results in new cells with genetic material that is identical to the genetic material of the original cell
G1- Cell growth
S- DNA is copied
G2- growth and preperation for cell division
(page 155 in Modern Biology Text Book )
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When during a cell cycle does Replication occur?
The stage of the cell cycle, replication occurs is meosis The stage of the cell cycle, replication occurs is meosis The stage of the cell cycle, replication occurs is meosis The stage of the cell cycle, replication occurs is meosisDNA replication occurs during the S phase of interphase.
DNA replication occurs during which stage of the cell cycle?
The S cycle. Synthesis.
What part of the cell cycle occurs before mitosis can begin?
Interphase is the part of the cell cycle that occurs before mitosis can begin. Interphase is made up of the G1, S, and G2 phases. These phases of Interphase prepare the to-be-diving cell by increasing the cell size and synthesizing the DNA within that cell.
What are the phases of the menstrual cycle?
The menstrual cycle has three phases:1) Menstruation - this is when bleeding occurs due to the shedding of the endometrium (the uterine lining).2) Follicular phase - this is when the follicles develop. The follicle contains a single ovum, or egg. At the end of this phase ovulation occurs, which is when the egg is released from the follicle.3) Luteal phase - during which the corpus luteum forms. This phase can end with either pregnancy or the degradation of the corpus luteum.
What is the portion of the cell cycle during which replication occurs?
interphase
What is trade cycle and explain the various phases of trade cycle?
la la di da
Explain the phases of the systems development life cycle?
The phases of the systems development life cycle are planning, systems analysis, systems design, development, testing, implementation, and maintenance.
During which phases of the cells cycle do such mutation occur?
inerphase
When during a cell cycle does Replication occur?
The stage of the cell cycle, replication occurs is meosis The stage of the cell cycle, replication occurs is meosis The stage of the cell cycle, replication occurs is meosis The stage of the cell cycle, replication occurs is meosisDNA replication occurs during the S phase of interphase.
When does fertilization occur during the gymnosperms life cycle?
it occurs when it occurs
What happens during each of the four phases of the menstrual cycle?
u bleed
DNA replication occurs during which stage of the cell cycle?
The S cycle. Synthesis.
What part of the cell cycle occurs before mitosis can begin?
Interphase is the part of the cell cycle that occurs before mitosis can begin. Interphase is made up of the G1, S, and G2 phases. These phases of Interphase prepare the to-be-diving cell by increasing the cell size and synthesizing the DNA within that cell.
Which of the three stages of interphase does DNA replicate?
Interphase is only one phase of the cell cycle, which is composed of: G1, S, G2 and M phases. DNA replication occurs during the S phase of the cell cycle
What are the phases of the menstrual cycle?
The menstrual cycle has three phases:1) Menstruation - this is when bleeding occurs due to the shedding of the endometrium (the uterine lining).2) Follicular phase - this is when the follicles develop. The follicle contains a single ovum, or egg. At the end of this phase ovulation occurs, which is when the egg is released from the follicle.3) Luteal phase - during which the corpus luteum forms. This phase can end with either pregnancy or the degradation of the corpus luteum.
The sequence of events that occurs in a cell from one mitotic division to the next is called what?
Cell cycle and phases of nucear division
What is the portion of the cell cycle during which replication occurs?
interphase
