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NEET BIOLOGYCell Cycle and Cell Division Medium

Question

Which of the following options gives the correct sequence of events during mitosis?

A

Condensation, nuclear membrane disassembly, arrangement at the equator, centromere division, segregation, telophase

B

Condensation, crossing over, nuclear membrane disassembly, segregation, telophase

C

Condensation, centromere division, segregation, arrangement at the equator, telophase

D

Condensation, nuclear membrane disassembly, crossing over, segregation, telophase

Step-by-Step Solution

The correct sequence of events in mitosis is: 1. Prophase: Chromosomal material condenses . 2. Metaphase: The nuclear envelope disassembles completely, allowing chromosomes to spread through the cytoplasm and eventually arrange at the equator (metaphase plate) . 3. Anaphase: The centromere of each chromosome splits, and daughter chromatids segregate and move toward opposite poles . 4. Telophase: Chromosomes decondense at the poles . Crossing over is a feature of Meiosis, not Mitosis .

Exam Context & Concepts Covered

This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Cell Cycle and Cell Division . Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

BIOLOGYCell Cycle and Cell Division followingoptionscorrectsequenceevents

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A.A-IV, B-III, C-II, D-I
B.A-II, B-III, C-I, D-IV
C.A-I, B-II, C-IV, D-III
D.A-III, B-I, C-IV, D-II
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Cell wall formation in bacteria is facilitated by:

A.1. Ribosomes
B.2. Mesosomes
C.3. Golgi Apparatus
D.4. Centrosomes
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Which of the following statements are correct in the context of Golgi apparatus? A: It is the important site for the formation of glycoprotein and glycolipids B: It produces cellular energy in the form of ATP C: It modifies the protein synthesized by ribosomes on ER D: It facilitates the transport of ions E: It provides mechanical support

A.1. (B) and (C) only
B.2. (A) and (C) only
C.3. (A) and (D) only
D.4. (D) and (E) only
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Match List-I with List-II: List-I A. Metacentric chromosome B. Sub-metacentric chromosome C. Acrocentric chromosome D. Telocentric chromosome List-II I. Chromosome has a terminal centromere II. Middle centromere forming two equal arms of chromosome III. Centromere is slightly away from the middle chromosome resulting into two unequal arms IV. Centromere is situated close to its end forming one extremely short and one very long arm

A.A-I, B-II, C-III, D-IV
B.A-II, B-III, C-IV, D-I
C.A-III, B-IV, C-II, D-I
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The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after the S phase?

A.4
B.32
C.8
D.16
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and formation of X shaped structures called chiasmata. Reason (R): In oocytes of some vertebrates, diplotene can last for months or years.

A.(A) is correct but (R) is not correct.
B.(A) is not correct but (R) is correct.
C.Both (A) and (R) are correct and (R) is the correct explanation of (A).
D.Both (A) and (R) are correct but (R) is not the correct explanation of (A).
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Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after:

A.Anaphase
B.Telophase
C.Prophase
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Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle?

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