Q.163 Zoology ⭐ 360° Option Elimination Active
NEET 2024 Zoology Question 163 Solution
Topic: Biotechnology: Principles and Processes · Official NTA Booklet Code T1
Question
The "Ti plasmid" of Agrobacterium tumefaciens stands for
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Verified Against NTA Final Answer Key
Option (1) : Tumor inducing plasmid
📚 Biotechnology: Principles and Processes Easy
📋 Given Parameters & Problem Setup
Bacterial Vector Agrobacterium tumefaciens
Designation Ti plasmid
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⏱️ Save ~15 seconds The 30-Second Exam Hall Shortcut: ⚡ Ti Plasmid Full Form
Ti stands for Tumor-inducing! Agrobacterium tumefaciens delivers its T-DNA to transform normal plant cells into crown gall tumors!
1 Recall the natural genetic engineer of plants:
2 - Agrobacterium tumefaciens delivers a segment of DNA called 'T-DNA'.
3 - It carries the Ti plasmid.
4 - "Ti" stands for Tumor-inducing (it causes crown gall tumors in dicots).
5 Direct identification: Tumor inducing plasmid -> Option (1) / A.
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Why You Can 100% Trust This Shortcut: NCERT Biology · Biotechnology: Principles and Processes (Vectors for Cloning Genes in Plants)
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Step-by-Step Rigorous Workflow & Mathematical Proof
Step 1
Understand the Biology of Agrobacterium tumefaciens
Agrobacterium tumefaciens, a pathogen of several dicotyledonous plants, is able to deliver a piece of DNA (known as 'T-DNA') to transform normal plant cells into a tumor and direct these tumor cells to produce the chemicals required by the pathogen.
Step 2
Define the Ti Plasmid
The extra-chromosomal DNA element responsible for this oncogenic transformation is the tumor-inducing plasmid (Ti plasmid). In genetic engineering, this plasmid has been disarmed and modified into a non-pathogenic cloning vector.
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4-Option Deep Scan
360° Option Elimination Engine Key Feature
Diagnose every choice: Know exactly why the right option works and why distractors fail.
1 (1)
✓ 100% Correct Verdict & Scientific Reason:
Ti stands for Tumor-inducing, responsible for crown gall induction in dicot plants.
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Why this is airtight: None.
2 (2)
✗ Incorrect Verdict & Scientific Reason:
Ti has nothing to do with temperature independence.
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Student Fallacy (Why candidates pick this trap): Ti has nothing to do with temperature independence.
3 (3)
✗ Incorrect Verdict & Scientific Reason:
It induces tumors, it does not inhibit them.
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Student Fallacy (Why candidates pick this trap): It induces tumors, it does not inhibit them.
4 (4)
✗ Incorrect Verdict & Scientific Reason:
Incorrect terminology.
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Student Fallacy (Why candidates pick this trap): Incorrect terminology.
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NTA Trap Alert: Tumor Inducing vs Inhibiting
Carelessly selecting "inhibiting" instead of "inducing".
🛡️ How to avoid the -1 mark: Remember: Wild Agrobacterium CAUSES (induces) tumors in plants.
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Core NEET Syllabus Standard
Biology Core Zoology · Biotechnology: Principles and Processes Standard Benchmark
Core Scientific Principle Tested:
"The tumor inducing (Ti) plasmid of Agrobacterium tumefaciens has now been modified into a cloning vector which is no more pathogenic to the plants but is still able to use the mechanisms to deliver genes of our interest."
Syllabus Focus: Agrobacterium tumefaciens and the Tumor Inducing (Ti) Plasmid
✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗
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