define cell cycle and also m phase and it's type
question from 11th biology......^_^^_^
Answers
Answer:
it the cycle through which a cell prepare it self for growth phase (mitotic phase or inter phase)
2 phases : INTER PHASE AND MEIOSIS
Interphase includes : G1 PHASE , S- PHASE & G2 PHASE
teh. the cells starts mitosis and then meiosis...
HOPE U GET IT!!
PLZ MARK IT AS A BRAINLIEST
CELL CYCLE:
The cell cycle is the ordered sequence of events that occur in a cell in preparation for cell division. The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, S, and G2 make up interphase, which accounts for the span between cell divisions. On the basis of the stimulatory and inhibitory messages a cell receives, it “decides” whether it should enter the cell cycle and divide.
For a stimulatory signal to reach the nucleus and “turn on” cell division, four main steps must occur. First, a growth factor must bind to its receptor on the cell membrane. Second, the receptor must become temporarily activated by this binding event. Third, this activation must stimulate a signal to be transmitted, or transduced, from the receptor at the cell surface to the nucleus within the cell. Finally, transcription factors within the nucleus must initiate the transcription of genes involved in cell proliferation
M PHASE:
M phase. During the mitotic (M) phase, the cell divides its copied DNA and cytoplasm to make two new cells. M phase involves two distinct division-related processes: mitosis and cytokinesis. In cell biology, mitosis is a part of the cell cycle when replicated chromosomes are separated into two new nuclei. Cell division gives rise to genetically identical cells in which the number of chromosomes is maintained.
The Principal Stages of M Phase (Mitosis and Cytokineses) in an Animal Cell. The five stages of mitosis—prophase, Prometheaphase, metaphase, anaphase, and telophase—occur in strict sequential order, while cytokineses begins in anaphase and continues through telophase.
: the period in the cell cycle during which cell division takes place. — called also D phase.