NEET Biology Cell Cycle And Cell Division Revision Notes

Download NEET Biology Cell Cycle And Cell Division Revision Notes in PDF format. All Revision notes for Full Course Cell Cycle have been designed as per the latest syllabus and updated chapters given in your textbook for Cell Cycle in Full Course. Our teachers have designed these concept notes for the benefit of Full Course students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Full Course Cell Cycle for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Full Course Cell Cycle given on studiestoday

Revision Notes for Full Course Cell Cycle Cell Cycle

Full Course Cell Cycle students should refer to the following concepts and notes for Cell Cycle in Full Course. These exam notes for Full Course Cell Cycle will be very useful for upcoming class tests and examinations and help you to score good marks

Cell Cycle Notes Full Course Cell Cycle

 

Cell Cycle and Cell Division

 

1. Introduction: It is the process by which a mature cell divides and forms two nearly equal daughter cells which resemble the parental cell in a number of characters.
2. A cell divides when it has grown to a certain maximum size which disturb the karyoplasmic index (KI)/Nucleoplasmic ratio (NP)/Kernplasm connection.
3. Two processes take place during cell reproduction.
 
• Cell growth: (Period of synthesis and duplication of various components of cell).
• Cell division: (Mature cell divides into two cells).
 
Cell cycle: Howard and Pelc (1953) first time described it. The sequence of events which occur during cell growth and cell division are collectively called cell cycle. Cell cycle completes in two steps:
 
• Interphase
• M-phase/Dividing phase
 
(i) Interphase : It is the period between the end of one cell division to the beginning of next cell division. It is also called resting phase or not dividing phase. But, it is actually highly metabolic active phase, in which cell prepares itself for next cell division. In case of human beings it will take approx 25 hours. Interphase is completed in to three successive stages.
(a) G1 phase/Post mitotic/Pre-DNA synthetic phase/Gap Ist
(b) S-phase/Synthetic phase
(c) G2-phase/Pre mitotic/Post synthetic phase/gap-IInd
 
(ii) M-phase/Dividing phase/Mitotic phase
(a) Nuclear division i.e. karyokinesis occurs in 4 phases – prophase, metaphase, anaphase and telophase. It takes 5-10% (shortest phase) time of whole division.
(b) Cytokinesis : Division of cytoplasm into 2 equal parts. In animal cell, it takes place by cell furrow method and in plant cells by cell plate method.
 
4. Duration of cell cycle: It depends on the type of cell and external factors such as temperature, food and oxygen. Time period for G1, S, G2 and M-phase is species specific under specific environmental conditions. e.g. 20 minutes for bacterial cell, 8-10 hours for intestional epithelial cell, and onion root tip cells may take 20 hours.
 
5. Regulation of cell cycle: Stage of regulation of cell cycle is G1 phase during which a cell may follow one of the three options.
 It may start a new cycle, enter the S-phase and finally divide.
 It may be arrested at a specific point of G1 phase.
 It may stop division and enter G0 quiscent stage. But when conditions change, cell in G0 phase can resume the growth and reenter the G1 phase.
 
6. Cell division is of three types, Amitosis, Mitosis and Meiosis.
 
7. Difference between cell Mitosis and Meiosis
 
 NEET-Biology-Cell-Cycle-and-Cell-Division-Revision-Notes 1
NEET-Biology-Cell-Cycle-and-Cell-Division-Revision-Notes 2
NEET-Biology-Cell-Cycle-and-Cell-Division-Revision-Notes 3
Reproduction in Flowering Plants
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NEET Full Course Cell Cycle Cell Cycle Notes

We hope you liked the above notes for topic Cell Cycle which has been designed as per the latest syllabus for Full Course Cell Cycle released by NEET. Students of Full Course should download and practice the above notes for Full Course Cell Cycle regularly. All revision notes have been designed for Cell Cycle by referring to the most important topics which the students should learn to get better marks in examinations. Our team of expert teachers have referred to the NCERT book for Full Course Cell Cycle to design the Cell Cycle Full Course notes. After reading the notes which have been developed as per the latest books also refer to the NCERT solutions for Full Course Cell Cycle provided by our teachers. We have also provided a lot of MCQ questions for Full Course Cell Cycle in the notes so that you can learn the concepts and also solve questions relating to the topics. We have also provided a lot of Worksheets for Full Course Cell Cycle which you can use to further make yourself stronger in Cell Cycle.

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