Q.185 Zoology ⭐ 360° Option Elimination Active

NEET 2024 Zoology Question 185 Solution

Topic: Cell Cycle and Cell Division · Official NTA Booklet Code T1

Question

Following are the stages of cell division: A. Gap 2 phase B. Cytokinesis C. Synthesis phase D. Karyokinesis E. Gap 1 phase Choose the correct sequence of stages from the options given below:

(1)B-D-E-A-C
(2)E-C-A-D-B
(3)C-E-D-A-B
(4)E-B-D-A-C

✓

Verified Against NTA Final Answer Key

Option (2) : E-C-A-D-B

📚 Cell Cycle and Cell Division Easy

📋 Given Parameters & Problem Setup

Event Eukaryotic cell division cycle

Stages A: Gap 2 phase (G2); B: Cytokinesis; C: Synthesis phase (S); D: Karyokinesis; E: Gap 1 phase (G1)

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The 30-Second Exam Hall Shortcut: ⚡ Universal Cell Cycle Chronology (G1 -> S -> G2 -> M)

⏱️ Save ~20 seconds

Cell cycle order is always: G1 phase (E) -> S phase (C) -> G2 phase (A) -> Karyokinesis (D) -> Cytokinesis (B)! Sequence: E -> C -> A -> D -> B!

1 Recall the sequential phases of the cell cycle:

2 Gap 1 (G1) phase: Interval between mitosis and DNA replication (E).

3 Synthesis (S) phase: DNA replication occurs (C).

4 Gap 2 (G2) phase: Protein synthesis in preparation for mitosis (A).

5 Karyokinesis: Nuclear division (prophase, metaphase, anaphase, telophase) (D).

6 Cytokinesis: Division of cytoplasm to form two daughter cells (B).

7 Sequential progression: E -> C -> A -> D -> B -> Option (2) / B.

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Cell Cycle and Cell Division (Phases of Cell Cycle)

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Interphase Progression (G1 -> S -> G2)

Interphase, though called the resting phase, is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication in an orderly manner. It is divided into three phases: - G1 phase (Gap 1): Cell is metabolically active and continuously grows (Stage E). - S phase (Synthesis): DNA replication takes place (Stage C). - G2 phase (Gap 2): Proteins are synthesised in preparation for mitosis while cell growth continues (Stage A).

Step 2

M Phase Progression (Karyokinesis -> Cytokinesis)

The M Phase starts with the nuclear division, corresponding to the separation of daughter chromosomes (karyokinesis) (Stage D) and usually ends with division of cytoplasm (cytokinesis) (Stage B).

Step 3

Select Valid Sequence

The correct progression is E -> C -> A -> D -> B, which corresponds to Option (2).

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 (1)

✗ Incorrect

Verdict & Scientific Reason:

Starts with cytokinesis.

⚠️

Student Fallacy (Why candidates pick this trap): Starts with cytokinesis.

2 (2)

✓ 100% Correct

Verdict & Scientific Reason:

Accurately outlines standard eukaryotic cell cycle: G1 -> S -> G2 -> Karyokinesis -> Cytokinesis.

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Why this is airtight: None.

3 (3)

✗ Incorrect

Verdict & Scientific Reason:

Places S phase before G1 phase.

⚠️

Student Fallacy (Why candidates pick this trap): Places S phase before G1 phase.

4 (4)

✗ Incorrect

Verdict & Scientific Reason:

Places cytokinesis before nuclear division.

⚠️

Student Fallacy (Why candidates pick this trap): Places cytokinesis before nuclear division.

⚠️

NTA Trap Alert: Cytokinesis vs Karyokinesis Order

Placing cytokinesis (cytoplasm division) before karyokinesis (nuclear division).

🛡️ How to avoid the -1 mark: Nucleus must divide first (karyokinesis) before the cell body divides (cytokinesis).

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Core NEET Syllabus Standard

Biology Core Zoology · Cell Cycle and Cell Division Standard Benchmark

Core Scientific Principle Tested:

"The interphase is divided into three further phases: G1 phase (Gap 1), S phase (Synthesis), G2 phase (Gap 2)... The M Phase represents the phase when the actual cell division occurs, starting with karyokinesis and ending with cytokinesis."

Syllabus Focus: Sequential Phases of the Eukaryotic Cell Cycle

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2024 Zoology Question 185 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Universal Cell Cycle Chronology (G1 -> S -> G2 -> M)

Step-by-Step Rigorous Workflow & Mathematical Proof

Interphase Progression (G1 -> S -> G2)

M Phase Progression (Karyokinesis -> Cytokinesis)

Select Valid Sequence

360° Option Elimination Engine Key Feature

NTA Trap Alert: Cytokinesis vs Karyokinesis Order

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

🔗 Related Questions — Cell Cycle and Cell Division

Sequential Phases of the Eukaryotic Cell Cycle

Stages of Meiosis I and Comparison with Mitosis

Function of Spindle Fibers during Mitosis (Chromosome Segregation)

Centromere Splitting in Meiosis

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