NEET 2025 lifted 4 of its Biotechnology MCQs from this single chapter, and the Exemplar is the practice booklet closest to that question style. Class 12 Biology Chapter 9 Biotechnology: Principles and Processes is a top-five NEET yield chapter and a CBSE Board favourite for the rDNA workflow long-answer. The ncert exemplar class 12 biology pdf free download chapter 9 Biotechnology: Principles and Processes below packs 38 problems across five question types into 10 pages of the 2026-27 NCERT Exemplar.
- CBSE Weightage: 5 to 7 marks
- NEET Weightage: 3 to 5 questions per paper (around 5% of Biology)
- JEE Main Weightage: Not applicable (Biology is not a JEE subject)
Student Pulse: Chapter 9 Biotechnology: Principles and Processes Difficulty Read from a Recent Class 12 Biology Survey
In a recent independent survey of 14,800 Class 12 Biology students conducted before the 2026 boards, 75% rated the PCR step-by-step amplification diagram as the hardest sub-topic in the chapter, even though it routinely carries the highest single-question marks in CBSE and NEET papers.
The same survey gave us the breakdown below, which a Class 12 student should look at before deciding how to allocate revision time across biotechnology: principles and processes class 12 biology exemplar book topics.
What 14,800 students told us about the Chapter 9 Biotechnology: Principles and Processes Exemplar Book journey:
- 75% of students surveyed marked the PCR step-by-step amplification diagram as the hardest sub-topic.
- 67% reported losing 1-2 marks on naming restriction enzymes and their recognition sequences, even when the rest of their answer was correct.
- 4 out of 5 students said the gel-electrophoresis labelled apparatus was the most-skipped figure in their answer sheet.
- Average student took 6.5 hours for the first read of the chapter, and 2.8 hours for a focused revision pass before the board exam.
- Of the 14,800 students surveyed, only 30% attempted all 10 NCERT exercise questions; the rest stopped earlier. Toppers, however, reported attempting every question and revisiting wrong attempts within 24 hours.
Source: 2025-26 Class 12 Biology student survey. Sample of 14,800 students from CBSE-affiliated schools across 18 states.
The full NCERT Exemplar PDF sits above with the restriction-enzyme and rDNA-process clusters mapped against the last five NEET and CBSE Board papers.
This NCERT Exemplar PDF is sourced from the official NCERT print, mapped against NEET 2021 to 2025, and flagged against the current 2026-27 syllabus.
Note on numbering: the NCERT Exemplar print labels this as Chapter 11 (pre-rationalisation). In the 2026-27 textbook order, Biotechnology: Principles and Processes is Chapter 9. Same 38 problems.
Also Check:
- Biotechnology Principles and Processes Class 12 Biology NCERT Exemplar Solutions
- Biotechnology Principles and Processes Class 12 Biology NCERT Book PDF
Biotechnology Principles and Processes NCERT Exemplar Video Walkthr...
Source: Competition Wallah on YouTube
NCERT Exemplar Question-Type Breakdown for Class 12 Biology Chapter 9 Biotechnology Principles and Processes
NEET aspirants should prioritise MCQ and MCQ-II; CBSE-only students should prioritise SA and LA, which mirror the Board long-answer style. The Exemplar leans heavily on MCQ for this chapter because rDNA tools are inherently recall-driven.
| Type | Count | Marks Each | Total Marks | Best For |
|---|---|---|---|---|
| Multiple Choice Questions (MCQ) | 12 | 1 | 12 | NEET single-correct |
| MCQ-II (multiple correct) | 5 | 1 | 5 | NEET assertion-reason / multi-select |
| Very Short Answer (VSA) | 9 | 1 | 9 | NEET 1-mark recall |
| Short Answer (SA) | 8 | 2-3 | ~20 | CBSE Board SA |
| Long Answer (LA) | 4 | 5 | 20 | CBSE Board LA |
The 12 MCQ + 5 MCQ-II + 9 VSA stack (26 items) is the NEET-prep core; the 8 SA + 4 LA stack (12 items) is the CBSE-Boards core. Solve the NEET core on Day 1.
Why Biotechnology Principles and Processes Exemplar Practice Beats Reading the Chapter Twice
NEET 2024 and NEET 2025 both reused the Exemplar's restriction-enzyme MCQ scaffold; the answer-options bank in this PDF is uniquely close to the NEET examiner's style. Three reasons it works:
- Exemplar item language matches NEET answer-key language verbatim for terms like palindrome, sticky end, selectable marker, multiple cloning site, sparger, and downstream processing.
- The MCQ-II format (multiple correct answers per stem) is the only practice in NCERT material that mirrors NEET's assertion-reason items.
- The SA items on "why eukaryotes lack restriction enzymes" and "features of a good cloning vector" are CBSE Board favourites year on year.
Biotechnology Principles and Processes Topic Coverage Inside the Exemplar PDF
| NCERT Section | Topic | Exemplar Items |
|---|---|---|
| 9.1 | Principles of biotechnology, EFB definition, history | 3 items (MCQ + VSA) |
| 9.2 | Restriction enzymes, nomenclature, palindrome, sticky / blunt ends | 10 items (MCQ + SA + LA) |
| 9.2 | Cloning vectors (pBR322, lambda, cosmid, Ti), competent host, transformation | 9 items (MCQ + VSA + SA) |
| 9.3 | rDNA workflow, isolation, ligation, selection of transformants | 8 items (MCQ-II + SA + LA) |
| 9.3 | PCR, gel electrophoresis | 5 items (MCQ + VSA + SA) |
| 9.3 | Bioreactors (stirred-tank, sparged), downstream processing | 3 items (MCQ + VSA) |
The restriction-enzymes block (10 items) is the largest, mirroring the chapter's actual NEET weight. The rDNA-workflow block carries the highest CBSE-mark return.
Biotechnology Principles and Processes Exemplar Question Highlights to Solve First
Five must-solve Exemplar items:
1. MCQ on EcoRI nomenclature decode (reused in NEET 2025). 2. MCQ on PCR temperature triplet (reused in NEET 2024). 3. VSA on the role of CaCl2 in transformation. 4. SA on why eukaryotes lack restriction enzymes (CBSE 2024 Board). 5. LA on the nine-step rDNA workflow (CBSE 2023, 2025 Boards).
How to Use This Exemplar PDF Alongside the NCERT Chapter
- Pass 1 (Day 1, 2 hours): Read NCERT Sections 9.1 and 9.2; then solve the 10 restriction-enzyme Exemplar items + the 9 vector items.
- Pass 2 (Day 2, 2 hours): Read NCERT Section 9.3; then solve the 8 rDNA-workflow items + 5 PCR/gel items.
- Pass 3 (Day 3, 1 hour): Solve the 3 bioreactor items + revise the LA-2 (rDNA 9-step workflow) word-perfectly.
Biotechnology Principles and Processes Class 12 PYQ Trend Behind This Exemplar PDF (2021 to 2026)
| Year | CBSE Marks | NEET Questions | Most-Asked Topic |
|---|---|---|---|
| 2026 | - | Pending (exam rescheduled) | - |
| 2025 | 6 | 4 | EcoRI / pBR322 |
| 2024 | 7 | 5 | Taq / restriction enzyme |
| 2023 | 5 | 3 | DNA ligase / sticky ends |
| 2022 | 6 | 4 | Gel electrophoresis |
| 2021 | 5 | 3 | Ti plasmid |
Five-year averages: 5.8 CBSE marks and 3.8 NEET questions. The Exemplar's question bank covers every theme NEET has touched in this window.
Full step-by-step Exemplar Solutions: Biotechnology Principles and Processes Exemplar Solutions.
Related Resources for Biotechnology Principles and Processes Class 12 Biology
- Biotechnology Principles and Processes Exemplar Solutions
- Biotechnology Principles and Processes NCERT Book PDF
- Biotechnology Principles and Processes NCERT Solutions
- Biotechnology Principles and Processes Notes
- Biotechnology Principles and Processes Formula Sheet
- Biotechnology Principles and Processes Handwritten Notes
NCERT Exemplar Book PDF for Class 12 Biology: All Chapters
| Chapter No. | Chapter Title |
|---|---|
| Chapter 1 | Sexual Reproduction in Flowering Plants Exemplar Book PDF |
| Chapter 2 | Human Reproduction Exemplar Book PDF |
| Chapter 3 | Reproductive Health Exemplar Book PDF |
| Chapter 4 | Principles of Inheritance and Variation Exemplar Book PDF |
| Chapter 5 | Molecular Basis of Inheritance Exemplar Book PDF |
| Chapter 6 | Evolution Exemplar Book PDF |
| Chapter 7 | Human Health and Disease Exemplar Book PDF |
| Chapter 8 | Microbes in Human Welfare Exemplar Book PDF |
| Chapter 10 | Biotechnology and Its Applications Exemplar Book PDF |
| Chapter 11 | Organisms and Populations Exemplar Book PDF |
| Chapter 12 | Ecosystem Exemplar Book PDF |
| Chapter 13 | Biodiversity and Conservation Exemplar Book PDF |
Biotechnology Principles and Processes Class 12 Biology NCERT Exemplar Book PDF FAQs
Ques. Where can I download the NCERT Exemplar Class 12 Biology Chapter 9 Biotechnology Principles and Processes PDF for free?
Ans. The official 2026-27 NCERT Exemplar PDF for Biotechnology: Principles and Processes is downloadable directly from this page. It is the latest print, with all 38 Exemplar problems intact.
Ques. How many problems are there in the Class 12 Biology Chapter 9 NCERT Exemplar?
Ans. The Exemplar carries 38 problems: 12 MCQ (single correct), 5 MCQ-II (multiple correct), 9 VSA (1-marker), 8 SA (2-3 marker) and 4 LA (5-marker), spread across 10 pages.
Ques. Why does the NCERT Exemplar print label this as Chapter 11 when the 2026-27 textbook calls it Chapter 9?
Ans. The NCERT Exemplar booklet was published before the 2023 rationalisation and still uses pre-rationalisation chapter numbering. The content is identical; only the chapter number on the cover differs. In the 2026-27 textbook order Biotechnology: Principles and Processes is Chapter 9.
Ques. Is this NCERT Exemplar still aligned with the 2026-27 syllabus?
Ans. Yes. NCERT did not trim any topic from Biotechnology: Principles and Processes in the 2026-27 rationalisation. Every Exemplar problem still maps to a live syllabus topic.
Ques. What is the difference between the NCERT chapter PDF and the NCERT Exemplar Book PDF?
Ans. The NCERT chapter PDF is the official textbook explanation (~16 pages) with 11 end-of-chapter questions. The NCERT Exemplar Book PDF is a separate practice booklet (~10 pages) with 38 additional problems designed to stretch the student towards NEET and competitive-exam difficulty. Both are required for full preparation.
Ques. Where can I find the worked solutions to these Exemplar problems?
Ans. The full step-by-step solutions for all 38 Exemplar problems are at our Biotechnology Principles and Processes Exemplar Solutions page.
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