Interphase of cell cycle

Cell Cycle
INTRODUCTION

The cell undergoes a sequence of changes, which involves period of growth, replication
of DNA, followed by cell division. This sequence of changes is called cell cycle.
It comprises two phases viz., interphase which is the period of non-apparent
division and the period of division also known as mitotic phase. Each phase is further
subdivided into different sub-phases.
INTERPHASE
The period of life cycle of cell (cell cycle) between two consecutive divisions is
termed as the interphase or misleadingly called resting phase. It is the period of great
biochemical activity and can further be divided into G1-phase, S-phase and G2-phase.
G1 (Gap 1) is the period of extensive metabolic activity, in which cell normally grows
in size, specific enzymes, are synthesized and DNA base units are accumulated for the
DNA synthesis. Post-mitotic cell can exit the cell cycle during G1 entering a phase called
G0, and remain for days, weeks, or in some cases (e.g., nerve cells and cells of the eye
lens) even the life time of the organism without proliferating further. Following the G1 is
the S-phase (synthesis phase) during which the DNA is synthesized and (chromosome
are replicated) which initiates G2 phase (pre-mitotic phase), thus preparing the cell for
division e.g., energy storage for chromosome movements, mitosis specific proteins,
RNA and microtubule subunits (for spindle fibers) synthesize. Cells then proceed to
next phase which is the period of division).At each stage, there are specific check
points, which determine the fate of new phase according to cell’s internal make up.
Length of each phase is variable. In the case of human cell, average cell cycle is about
24 hours, mitosis takes 30 minutes, G1 9 hours, the S-phase 10 hours, and G2 4.5 hours
whereas full cycle in yeast cells is only 90 minutes

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#interphase
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[aslamrafique]

Very excellent lectures
May Allah bless you (sir) with more and more succes.
You are the real stars of our society.

[mahsumkamboo]

your teaching method is amazing sir may Allah give you long life keep going it

[hayalamir]

Allah apko lambi sehat wali zindagi ata kerey, Allah apko bihat ziyada kamiyab kerey sir .😭😭😭😭
Mere concept clear kr diya ap ne

Thank you soo much
Love you ❤❤❤

[sareenanazar]

Mashallah sir ❤Allah may bless u Ameen

[AbdulRasheed-hdoo]

sir ap bht acha prhate hen plz is chapter ka b mdcat lecture den

[fizamumtaz]

Sir nice lctr plz or lctrz b upload krdyn .... daily 1 krdya kryn

[salmanahmad]

SIR plz upload this chapter is continue with topic to topic ❣️ SIR MDcat sequence per

[SahibKhan-unek]

When chromosomes are doubled means that there are 92chromosomes are in that cell? Am I right please reply