Alignment of chromosomes in the center of the cell at the equatorial plate constitutes which stage of mitosis?

This question was previously asked in
NTPC CBT-I (Held On: 19 Jan 2021 Shift 1)
View all RRB NTPC Papers >
  1. Telophase
  2. Anaphase
  3. Prophase
  4. Metaphase

Answer (Detailed Solution Below)

Option 4 : Metaphase
Free
RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
5.4 Lakh Users
100 Questions 100 Marks 90 Mins

Detailed Solution

Download Solution PDF

The correct answer is Metaphase.

Key Points

  • Mitosis is a kind of cell division in which one cell (the mother) divides to generate two genetically identical new cells (the daughters).
  • Mitosis is the stage of the cell cycle's division process in which the DNA of the cell's nucleus is split into two equal sets of chromosomes.
  • Mitotic divisions are a mode of reproduction for single-celled eukaryotes like yeast, contributing new individuals to the population.
  • Phases of mitosis:
  • Interphase:
    • In preparation for cell division, the DNA in the cell is replicated, resulting in two identical full sets of chromosomes.
    • Two centrosomes, each comprising a pair of centrioles, are located outside of the nucleus and are essential for cell division.
    • Microtubules extend from these centrosomes during interphase.
  • Prophase:
    • Under a microscope, the chromosomes condense into X-shaped structures that are plainly visible.
    • Each chromosome is made up of two sister chromatids, each of which contains the same genetic material.
    • The chromosomes are paired up so that both copies of chromosome 1 are together, and so forth.
    • The membrane around the nucleus in the cell dissolves at the conclusion of the prophase, freeing the chromosomes.
    • The mitotic spindle, which is made up of microtubules and other proteins, spans the cell and connects the centrioles as they travel to opposite poles.
  • Metaphase:
    • The chromosomes are perfectly lined up end-to-end along the cell's equator.
    • The mitotic spindle threads extend from the centrioles, which are now at opposing poles of the cell.
    • The sister chromatids are connected by the mitotic spindle threads.
  • Anaphase: 
    • The mitotic spindle then pulls the sister chromatids apart, pulling one chromatid to one pole and the other chromatid to the opposite pole.
  • Telophase: 
    • A complete pair of chromosomes assemble at each cell pole.
    • To build two new nuclei, a membrane forms surrounding each set of chromosomes.
    • The single-cell then pinches in the middle, separating into two daughter cells, each with a nucleus and a full set of chromosomes. Cytokinesis is the name for this process.

61cc7db7da89959aa70e8061 16501145422731

Latest RRB NTPC Updates

Last updated on Jun 11, 2025

-> RRB NTPC 2025 Exam Postponed. Railway Recruitment Board has rescheduled the RRB NTPC Exam for June 5, 2025 (Shift 3). 

-> RRB NTPC Exam Analysis 2025 is LIVE now. All the candidates appearing for the RRB NTPC Exam 2025 can check the complete exam analysis to strategize their preparation accordingly. 

-> The UPSC Prelims Result 2025 and UPSC IFS Result 2025 has been released @upsc.gov.in

-> The RRB NTPC Admit Card 2025 has been released on its official website.

-> Candidates who will appear for the RRB NTPC Exam can check their RRB NTPC Time Table 2025 from here.

-> The RRB NTPC CBT 1 Exam is scheduled from 5th June to 24th June 2025 as per the revised tentative exam schedule. 

-> The RRB NTPC 2025 Notification has been released for a total of 11558 vacancies.

-> A total of 3445 Vacancies have been announced for Undergraduate posts like Commercial Cum Ticket Clerk, Accounts Clerk Cum Typist, Junior Clerk cum Typist & Trains Clerk.

-> A total of 8114 vacancies are announced for Graduate-level posts in the Non-Technical Popular Categories (NTPC) such as Junior Clerk cum Typist, Accounts Clerk cum Typist, Station Master, etc.

-> Prepare for the exam using RRB NTPC Previous Year Papers.

-> Check out the Rajasthan PTET Admit Card 2025 and UPSC Prelims Result Date 2025 here.

Get Free Access Now
Hot Links: teen patti casino apk teen patti club teen patti refer earn teen patti pro