Biotechnology NEET Previous Year Questions with Answers & Analysis

Biotechnology NEET Previous Year Questions Highlights

Prior to solving the NEET Biotechnology Previous Year Questions, it is essential that the candidates have knowledge regarding the important aspects related to the unit, such as its weightage, chapters, the number of questions, and difficulty level. The following table will give you a quick idea.

Download Biotechnology PYQs PDF for NEET 2027

Practising Biotechnology NEET previous year questions (PYQs) is one of the most effective ways to prepare for NEET UG 2027. Aspirants can check the Biotechnology NEET PYQs PDF given below in the table to understand repeated concepts, question patterns, and the level of difficulty asked in the exam.

Biotechnology NEET Previous Year Questions

Practising Biotechnology NEET Previous Year Questions helps students understand the latest exam pattern, frequently asked concepts, and high-weightage topics. Below are Biotechnology questions from the RE-NEET 2026 question paper, along with the correct answers and concise explanations to help aspirants strengthen their NEET 2027 preparation.

1. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: In recombinant DNA technology, lysozyme is used for disrupting bacterial cells while cellulase is for plant cells.

Reason R: Isolation of genetic material needs disruption of cells.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) A is not correct but R is correct

(2) Both A and R are correct and R is the correct explanation of A

(3) Both A and R are correct but R is NOT the correct explanation of A

(4) A is correct but R is not correct

Correct Answer: (3) Both A and R are correct but R is NOT the correct explanation of A

Explanation: Lysozyme digests the bacterial cell wall, while cellulase breaks down the cellulose cell wall of plant cells. Although isolation of genetic material requires cell disruption, this does not explain why different enzymes are used for bacterial and plant cells.

2. The inactive form of Bt toxin is converted to the active form in the insect gut ________.

(1) by nucleases

(2) due to alkaline pH

(3) due to acidic pH

(4) by proteases

Correct Answer: (2) due to alkaline pH

Explanation: The inactive Bt toxin (protoxin) is activated in the alkaline environment of the insect gut, where it becomes toxic and damages the gut epithelial cells.

3. Match List-I with List-II.

Choose the correct answer from the options given below:

(1) A-IV, B-I, C-III, D-II

(2) A-II, B-I, C-IV, D-III

(3) A-I, B-II, C-IV, D-III

(4) A-III, B-IV, C-II, D-I

Correct Answer: (2) A-II, B-I, C-IV, D-III

Explanation: Transformation involves transferring DNA into host bacteria, the cloning site contains restriction enzyme recognition sites, selection is carried out using antibiotic resistance markers, and the origin of replication (Ori) is responsible for DNA replication.

4. Given below are two statements:

Statement I: Plasmids are autonomously replicating DNA.

Statement II: Plasmids are extrachromosomal DNA.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) Statement I is incorrect but Statement II is correct

(2) Both Statement I and Statement II are correct

(3) Both Statement I and Statement II are incorrect

(4) Statement I is correct but Statement II is incorrect

Correct Answer: (2) Both Statement I and Statement II are correct

Explanation: Plasmids are small circular DNA molecules that exist outside the bacterial chromosome and replicate independently, making both statements correct.

5. During PCR, primers bind to the DNA strands in the ________ step.

(1) ligation

(2) denaturation

(3) extension

(4) annealing

Correct Answer: (4) annealing

Explanation: During the annealing step of PCR, primers bind (anneal) to their complementary DNA sequences. DNA polymerase then extends these primers during the extension step to synthesise new DNA strands.

Biotechnology NEET Previous Year Questions: Important Chapters

Biotechnology is an important unit in NEET, and questions from important concepts are often repeated from previous years. Focusing on high-yield chapters can help students score well and save time during the exam. There are two important chapters under the biotechnology unit that every NEET aspirant must prepare well:

Chapter – Principles and Processes of Biotechnology

This chapter highlights the aspects of biotechnology like genetic engineering and bioprocess engineering. This chapter is also concerned with techniques and procedures used in the technology of recombinant DNA.

Key Concepts to Highlight

• The techniques in recombinant DNA technology are such as restriction enzymes, ligase, plasmid, bacteriophage, cloning vector, and how these are used in transferring genes in a host organism.

• The procedure includes extraction of DNA, joining and cutting of DNA fragments, introduction in a host and cloning of genes.

• Bioreactor and downstream processing includes design, function, and the procedure of product recovery.

Chapter 2 – Biotechnology and Its Applications

In this chapter, we shall be discussing the application of biotechnology in agriculture and in medicine, products based on recombinant DNA technology, transgenic animals, and ethics involved in biotechnology.

Key Concepts to Learn

• Applications of biotechnology in agriculture include Bt crops, RNA interference, and transgenic plants.

• Applications of Biotechnology in Medicine are Insulin Production, Gene Therapy, PCR and ELISA.

• Transgenic Animals and Their Uses in Research, Medicine and Agriculture.

• Ethical issues of biotechnology include biopiracy, biosafety, and patents.

Most Important Biotechnology Topics for NEET 2027

Biotechnology is a high-scoring unit in NEET, with several concepts being tested repeatedly over the years. The table below highlights the most important topics that candidates should prioritise while preparing for NEET 2027.

Biotechnology NEET Weightage Analysis (2021–2026)

The table given below gives NEET weightage analysis of questions from the two chapters of the unit Biotechnology from 2021 to 2026:

According to the above table, the contribution of the Biotechnology chapter is between 6 to 11 questions per year, and the average number of questions is 8–9 per year, with a total weightage of 32-36 marks in the NEET Biology question paper. Thus, Biotechnology is considered to be one of the chapters that carry high weightage, around 9%, of the NEET Biology syllabus.

How to Prepare Biotechnology for NEET 2027?

The chapter Biotechnology is one of the most scoring chapters and easy if the right approach is followed. Below are some effective NEET preparation tips for the topic Biotechnology.

Understanding NCERT Thoroughly

Each NEET question either directly or indirectly is derived from the NCERT text or diagram. Thus, it is imperative to first start with understanding the NCERT textbook line by line, highlighting the most significant points and definitions.

Using Flowcharts and Concept Maps

Flowcharts and concept maps are an excellent way to understand processes. For instance, processes like the steps of recombinant DNA technology, the steps of PCR, ELISA and insulin synthesis.

Using Mnemonics

Mnemonics are great ways to remember things easily and interestingly. Processes that involve multiple steps can be learned in minutes, such as the steps of rDNA technology or PCR.

Solving PYQs and Concept-based MCQs

Most of the MCQs related to biotechnology are conceptual in nature. Thus, it becomes highly necessary to solve NEET MCQs. Solving PYQs gives you an edge.

Common Mistakes to Avoid in Biotechnology Preparation

Common mistakes that students make in Biotechnology are due to a lack of concept, NCERT information, and process flow.

• Memorisation of enzyme names without their function

• Confusion between restriction enzymes and DNA ligases

• Confusion in steps of PCR

• Not remembering the use of selectable markers

• Confusion between Bt toxin and Bt protoxin

• Confusion between RNA interference and gene therapy

• Memorising the application of biotechnology without knowing the organism/application

• Ignoring NCERT diagrams and process flow

• Focusing only on important sections of the syllabus

Are Biotechnology PYQs Enough for NEET 2027?

No. PYQs help to understand the question trends, but they must be accompanied by NCERT studies, concept revisions, and MCQs. The subject of biotechnology contains many facts and processes; thus, it is better to revise all NCERT material than to revise only the concepts that have been asked repeatedly in previous years.