Q.60 Match List I with List II
| List I (Transposons) | List II (Organism) | ||
|---|---|---|---|
| Label | Transposon | Label | Organism |
| A | P element | I | Drosophila |
| B | LINE and SINE | II | Human |
| C | Ty element | III | Yeast |
| D | Tn element | IV | Bacteria |
Choose the correct answer from the options given below:
- (A) – (I), (B) – (II), (C) – (III), (D) – (IV)
- (A) – (I), (B) – (III), (C) – (II), (D) – (IV)
- (A) – (I), (B) – (II), (C) – (IV), (D) – (III)
- (A) – (III), (B) – (IV), (C) – (I), (D) – (II)
Transposons are mobile genetic elements with species-specific examples used in genetic research and engineering.
Correct Answer
(A) – (I), (B) – (II), (C) – (III), (D) – (IV)
Label Transposon Correct Organism Key Feature A P element I. Drosophila Hybrid dysgenesis tool in fruit flies B LINE and SINE II. Human ~45% of human genome (Alu=SINE) C Ty element III. Yeast LTR retrotransposon in S. cerevisiae D Tn element IV. Bacteria Composite transposons (Tn5, Tn10) Each Transposon-Organism Match
A. P element → I. Drosophila
P elements cause hybrid dysgenesis in Drosophila melanogaster; used for germline mutagenesis and P-element transformation vectors.
✅ Classic fly transposon system.
B. LINE and SINE → II. Human
LINE-1 (L1) autonomous retrotransposons (~17% genome); SINEs like Alu (~10%) non-autonomous, still active in disease.
✅ Dominant human mobile elements.
C. Ty element → III. Yeast
Ty1-Ty5 retrotransposons with LTRs model eukaryotic transposition; ~30 copies/genome in Saccharomyces cerevisiae.
✅ Primary yeast transposon family.
D. Tn element → IV. Bacteria
Transposon “Tn” nomenclature (Tn3, Tn5, Tn10) for bacterial insertion sequences and composite transposons.
✅ Bacterial genetics standard.
All Options Analysis
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Perfect species-specific matches as detailed above.
✅ Correct option.
(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
LINE/SINE ≠ yeast (Ty elements); Ty ≠ human (LINE/SINE dominate).
❌ Wrong: Swaps major eukaryotic transposons.
(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
Ty ≠ bacteria (Tn elements); Tn ≠ yeast (Ty retrotransposons).
❌ Wrong: Confuses prokaryotic/eukaryotic systems.
(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
P element ≠ yeast; LINE/SINE ≠ bacteria; all mismatched.
❌ Wrong: No logical pairings.
Exam Mnemonic: P=Drosophila (I), LINE/Human (II), Ty/Yeast (III), Tn/Bacteria (IV) → PDHYB.
