BIOLOGIC
INSIGHTS
⚡ NEET 2025 DNA DECODER
MOLECULAR BASIS OF INHERITANCE
20-Year NEET Analysis | 100% NCERT + 5 Topper Secrets
💎 3 GOLDEN FACTS (NEET 2004-24)
14
PYQs on DNA Replication
92%
Direct from NCERT Diagrams
5x
Lac Operon Questions
🧬 DNA vs RNA: NEET's Favourite Comparison
| Feature | DNA | RNA | NEET Frequency |
|---|---|---|---|
| Sugar | Deoxyribose | Ribose | 4 Qs (2020-24) |
| Strands | Double | Single (mostly) | 3 Qs (2019-23) |
| Bases | A,T,G,C | A,U,G,C | 5 Qs (2018-22) |
🔄 Central Dogma Decoded
DNA → Transcription → RNA → Translation → Protein
NEET Hotspot: "Transcription in nucleus, Translation in cytoplasm"
🎯 5-Year Trend: 3 marks/year on transcription bubbles
🧬 DNA Replication Hacks
Enzymes Checklist:
- Helicase (Unwinds)
- SSB Proteins (Stabilize)
- DNA Polymerase III (Synthesis)
- Ligase (Joins Okazaki)
NEET Mnemonic:
"HOT LIPS" - Helicase, Okazaki, Topoisomerase, Ligase, Primase, SSB
🎠Lac Operon - NEET's Favorite Drama
Characters:
- Repressor - The strict parent
- Inducer (Lactose) - The rebel
- Operator - The gatekeeper
NEET Pattern:
- Diagram-based (5 times in 10 years)
- Negative control concept (3 times)
- Inducer-repressor interaction (4 times)
Pro Tip: "When lactose enters, repression ends!" - NEET 2022 question verbatim
📜 10-Year PYQ Goldmine
2023: Which enzyme joins Okazaki fragments?
DNA Ligase
2021: What is the function of RNA polymerase III?
tRNA synthesis
2019: In lac operon, what binds to the operator?
Repressor protein
🚨 NEET ALERT!
DNA Replication asked 4 years consecutively - Master it now!
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