Questions
47
across 8 papers
Share of subject
11.6%
of 405 Botany Qs
Weightage rank
#1
of 21 chapters
Difficulty
22 easy · 19 medium · 6 hard
Molecular Basis of Inheritance contributed 47 of the 405 NEET Botany questions between 2020 and 2026 (Re-NEET 2026 included). That is 11.6% of the subject and makes it the #1 chapter out of 21 by weightage — roughly 5.9 questions per paper, peaking at 10 in NEET 2021.
Of the 47 questions tagged for difficulty, 47% were easy, 40% medium and 13% hard — a chapter where NCERT-level preparation pays off directly.
It has been asked less often lately: 4.3 questions per paper across NEET 2025, NEET 2026 and Re-NEET 2026, against 7 in 2020–2022.
The single most-tested topic is Packaging of the DNA Helix (Nucleosome, Histone Proteins etc.) — 5 questions across 5 papers.
24 topics tagged under Molecular Basis of Inheritance. Numbers show how many questions each topic had in each paper; E / M / H are the easy, medium and hard counts.
| Topic | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Re | Total | E | M | H |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Packaging of the DNA Helix (Nucleosome, Histone Proteins etc.) | – | 1 | 1 | 1 | – | 1 | 1 | – | 5 | 1 | 4 | – |
| Regulation of Gene Expression (Lac-Operon) | – | – | – | 1 | 1 | – | 1 | 1 | 4 | 2 | 1 | 1 |
| Transcription (Initiation, Elongation and Termination Process, etc.) | 1 | 1 | – | – | 1 | 1 | – | – | 4 | 3 | – | 1 |
| DNA Fingerprinting | – | 1 | 1 | – | – | – | 1 | – | 3 | 2 | – | 1 |
| Human Genome Project (Methodologies/Salient Features of Human Genome) | – | – | 1 | 1 | – | 1 | – | – | 3 | 3 | – | – |
| RNA World | – | 1 | – | 1 | – | 1 | – | – | 3 | 1 | 2 | – |
| Transcription (Process of Transcription) | – | – | – | 1 | 1 | – | 1 | – | 3 | – | 2 | 1 |
| Genetic Code (Salient Features of Genetic Code) | 1 | 1 | – | – | – | – | – | – | 2 | – | 2 | – |
| The Search For Genetic Material (Hershey-Chase Experiment) | – | – | 1 | – | – | 1 | – | – | 2 | – | 2 | – |
| Transcription (Post Transcriptional Process) | – | 1 | – | – | – | 1 | – | – | 2 | – | 1 | 1 |
| Transcription (RNA Polymerases) | – | 1 | – | 1 | – | – | – | – | 2 | 2 | – | – |
| Translation (Process of Translation) | 1 | – | 1 | – | – | – | – | – | 2 | 2 | – | – |
| DNA Replication (The Machinery and Enzymes for DNA Replication, Mech…) | – | – | – | – | 1 | – | – | – | 1 | 1 | – | – |
| Genetic Code (Genetic Code/tRNA -The Adapter Molecule) | – | – | – | – | – | 1 | – | – | 1 | 1 | – | – |
| Genetic Code (Mutations and the Genetic Code) r– | – | 1 | – | – | – | – | – | – | 1 | 1 | – | – |
| Replication (The Experimental Proof) | – | – | – | – | 1 | – | – | – | 1 | – | – | 1 |
| The DNA (Chargaff's Rule) | – | 1 | – | – | – | – | – | – | 1 | – | 1 | – |
| The DNA (Derivation of DNA Structure and Central Dogma) | – | 1 | – | – | – | – | – | – | 1 | – | 1 | – |
| The DNA (Nitrogen Base) | 1 | – | – | – | – | – | – | – | 1 | – | 1 | – |
| The DNA (Nucleotide) | 1 | – | – | – | – | – | – | – | 1 | – | 1 | – |
| The Search For Genetic Material (Properties of Genetic Material e(DNA Versus RNA)) | – | – | – | 1 | – | – | – | – | 1 | 1 | – | – |
| Transcription (Transcription Unit) | – | – | – | – | 1 | – | – | – | 1 | – | 1 | – |
| Transcription (Types of RNA) | – | – | – | – | – | – | – | 1 | 1 | 1 | – | – |
| Transposons | – | – | 1 | – | – | – | – | – | 1 | 1 | – | – |
In the NEET papers from 2020 to 2026 (including Re-NEET 2026), 47 Botany questions came from Molecular Basis of Inheritance — 11.6% of the subject, or about 5.9 per paper.
By past weightage it ranks #1 of 21 Botany chapters, so it is one of the five highest-weightage Botany chapters, with 47 questions over 2020–2026.
The most-tested topics are Packaging of the DNA Helix (Nucleosome, Histone Proteins etc.) (5), Regulation of Gene Expression (Lac-Operon) (4) and Transcription (Initiation, Elongation and Termination Process, etc.) (4). The topic table above lists every topic with its count in each paper.
Of the 47 difficulty-tagged questions, 47% were easy, 40% medium and 13% hard.
Packaging of the DNA Helix (Nucleosome, Histone Proteins etc.), Regulation of Gene Expression (Lac-Operon), DNA Fingerprinting and Transcription (Process of Transcription) and more were asked in the 2026 papers.
Edurack has chapter-wise NEET previous-year questions for Molecular Basis of Inheritance. Use the practice button on this page to open the set, attempt questions and check your answers.
Counts come from Edurack's tagged set of NEET papers 2020–2026 (including Re-NEET 2026), mapped to NCERT chapters and topics. Use them as a trend guide — past frequency doesn't guarantee what a future paper will ask.