Which one of the following never occurs during mitotic cell division?
- Spindle fibres attach to kinetochores of chromosomes
- Movement of centrioles towards opposite poles
- Pairing of homologous chromosomes
- Coiling and condensation of the chromatids
The Correct Option is C
Solution and Explanation
- Spindle fibres attach to kinetochores of chromosomes: This process is crucial in mitosis for the separation of sister chromatids. Spindle fibres connect to kinetochores on the chromosomes, which allows for the equal distribution of chromatids into the daughter cells.
- Movement of centrioles towards opposite poles: In mitosis, centrioles play a role in organizing microtubules into spindle fibres. They migrate to opposite poles of the cell to establish the poles of the mitotic spindle, essential for chromatid separation.
- Pairing of homologous chromosomes: This occurs during meiosis, not mitosis. In meiosis, homologous chromosomes pair during prophase I, allowing for genetic recombination. In mitosis, homologous chromosomes do not pair; instead, sister chromatids are separated.
- Coiling and condensation of the chromatids: This occurs in prophase of mitosis where chromatin fibres condense to become visible chromosomes, facilitating their separation.
Top Questions on cell cycle and cell division
- Choose the correct statements among the following:
1. Duplication of genome, synthesis of other cell constituents, and division to produce new cells is called cell cycle.
2. Interphase is followed by a resting phase.
3. In every cell division, genetic variability will increase from generation to generation.
4. Plant cells can divide mitotically in both haploid and diploid cells.
Identify the correct option from the following:- AP EAPCET - 2025
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A) Formation of synaptonemal complex
B) Repulsion between Homologous chromosomes
C) Formation of Bivalents
D) Exchange of Genetic material between non-sister chromatids of Homologous chromosomes
E) Terminalization
The correct sequence is
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- cell cycle and cell division
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- Which of the following is a characteristic of prokaryotic cells?
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Questions Asked in NEET exam
Which of the following microbes is NOT involved in the preparation of household products?
A. \(\textit{Aspergillus niger}\)
B. \(\textit{Lactobacillus}\)
C. \(\textit{Trichoderma polysporum}\)
D. \(\textit{Saccharomyces cerevisiae}\)
E. \(\textit{Propionibacterium sharmanii}\)- NEET (UG) - 2025
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A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
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Predict the major product $ P $ in the following sequence of reactions:
(i) HBr, benzoyl peroxide
(ii) KCN
(iii) Na(Hg), $C_{2}H_{5}OH$- NEET (UG) - 2025
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AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
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- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
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Concepts Used:
Cell Cycle and Cell Division
Cell Cycle:
The sequence of events by which a cell copies itself synthesizes other constituents of the cell and eventually splits into two daughter cells is termed the cell cycle. The cell synthesizes all its constituents in a sequential pattern to make sure the proper division and distribution of components that occurs between the two daughter cells. Therefore, we can say that the cell cycle is the period of time between the development of new daughter cells and their further division.
Stages of Cell Cycle:
The cell cycle can be sub-divided into an additional category of Interphase. Meanwhile, the Interphase can be branched into 3 further stages, such as:
- G1 Phase - “Gap 1 Phase”
- S Phase - "Synthesis Phase"
- G2 Phase - "Gap 2 Phase"
Read More: Cell Cycle and Cell Division
Cell Division:
The division of the parent cells into two or more cells is called daughter cell, cell division takes place. In general, it occurs as a part of a larger cell cycle. All the cell reproduces by dividing into two, wherein each parental cell produces two daughter cells.
Stages of Cell Division:
Cell division can be widely divided into several sub-segments that result from Mitosis and Meiosis.
- Mitosis or (M Phase)
- Meiosis