Q.180 Zoology ⭐ 360° Option Elimination Active

NEET 2026 Zoology Question 180 Solution

Topic: Biotechnology: Principles and Processes · Official NTA Booklet Code 50

Question

Match List-I with List-II. List I: A. Transformation; B. Cloning site; C. Selection; D. Ori. List II: I. Restriction enzyme; II. Transfer DNA to host bacteria; III. Replication; IV. Antibiotic. Choose the correct answer from the options given below:

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Verified Against NTA Final Answer Key

Option (1) : A-II, B-I, C-IV, D-III

📚 Biotechnology: Principles and Processes Easy

📋 Given Parameters & Problem Setup

List I (Features/Processes) A. Transformation, B. Recognition site, C. Selectable marker, D. Origin of replication (ori)

List II (Roles) I. Specific restriction endonuclease cleavage site, II. Introduction of recombinant DNA into recipient host, III. Controls copy number and initiates DNA synthesis, IV. Identification and elimination of non-transformants

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The 30-Second Exam Hall Shortcut: ⚡ Biotech Vector Anatomy Quad-Match

⏱️ Save ~40 seconds

Transformation = II; Cloning site = I; Selectable marker = IV; Ori = III!

1 A. Transformation: Procedure by which a piece of DNA is introduced into a host bacterium -> matches II.

2 B. Recognition site (cloning site): Site recognized and cleaved by restriction endonuclease -> matches I.

3 C. Selectable marker: Identifies transformants and selectively eliminates non-transformants -> matches IV.

4 D. Origin of replication (ori): Sequence where replication starts and controls copy number -> matches III.

5 Match: A-II, B-I, C-IV, D-III.

6 Scan options: Matches Option (1) directly. Done in 5 seconds!

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Biotechnology: Principles and Processes (Electrophoresis: DNA fragments move toward anode based on size).

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Core Features of a Cloning Vector

NCERT defines the four indispensable features required to facilitate cloning into a vector:

\begin{aligned} \text{A. Transformation} &\implies \text{Introduction of rDNA into recipient host } (\text{List II - II}) \\ \text{B. Recognition site} &\implies \text{Specific restriction endonuclease cleavage site } (\text{List II - I}) \\ \text{C. Selectable marker} &\implies \text{Identification & elimination of non-transformants } (\text{List II - IV}) \\ \text{D. Origin of replication (ori)} &\implies \text{Initiation of replication & controls copy number } (\text{List II - III}) \end{aligned}

• Selectable markers typically include antibiotic resistance genes such as ampicillin, tetracycline, chloramphenicol, or kanamycin resistance.

Step 2

Consolidate Matches

Aligning all four pairs gives: A-II, B-I, C-IV, D-III, which uniquely corresponds to Option (1).

\text{A-II, B-I, C-IV, D-III} \implies \text{Option (1)}

• Completes the entire set of 180 questions for NEET 2026!

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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 A

✓ 100% Correct

Verdict & Scientific Reason:

100% correct. Transformation (II), Recognition site (I), Selectable marker (IV), and Origin of replication (III).

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Why this is airtight: None; classic vector anatomy mapping.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Swaps Transformation with Recognition site, and Marker with Ori.

⚠️

Student Fallacy (Why candidates pick this trap): Inverting vector definitions.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Mismatches Transformation to Ori role.

⚠️

Student Fallacy (Why candidates pick this trap): Random scrambling.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Maps Transformation to Selectable marker.

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Student Fallacy (Why candidates pick this trap): Confusing the transformation process with the marker screen.

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NTA Trap Alert: Ori vs. Selectable Marker Functions

Students sometimes forget that the "ori" not only initiates replication, but is also responsible for controlling the COPY NUMBER of the linked DNA.

🛡️ How to avoid the -1 mark: Remember: Ori = Origin + Copy control; Selectable Marker = Screen for survivors (AmpR/TetR).

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Core NEET Syllabus Standard

NEET Biology Core Syllabus · Biotechnology: Principles and Processes Standard Benchmark

Core Scientific Principle Tested:

"Transformation introduces foreign DNA; recognition site is cleaved by restriction enzymes; selectable marker selects transformants; ori controls replication and copy number."

Syllabus Focus: Cloning Vectors

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

Transform into Host (II), Recognize Enzyme (I), Select Survivors (IV), Ori starts Replication (III)!

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NEET 2026 Zoology Question 180 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Biotech Vector Anatomy Quad-Match

Step-by-Step Rigorous Workflow & Mathematical Proof

Core Features of a Cloning Vector

Consolidate Matches

360° Option Elimination Engine Key Feature

NTA Trap Alert: Ori vs. Selectable Marker Functions

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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