NEET 2026 Biology: Top 50 Most Expected Questions with Solutions – Download PDF

NEET 2026 Biology 50 Most Expected Questions with Solutions

Some Biology NEET important questions are given below for practise:

Ques 1: Which of the following is the correct unit of productivity in an ecosystem?

A. (KCal m⁻²) yr⁻¹

B. gm⁻²

C. KCal m⁻²

D. KCal m⁻³

Correct Answer: A

Explanation:

Productivity is measured as the rate of energy production per unit area per unit time, hence expressed as KCal m⁻² yr⁻¹.

Ques 2: The first occurrence of menstruation in females is known as:

A. Ovulation

B. Menopause

C. Menarche

D. Diapause

Correct Answer: C

Explanation:

Menarche marks the beginning of the menstrual cycle in females, indicating reproductive maturity.

Ques 3: Genes R and Y assort independently. If RRYY produces round yellow seeds and rryy produces wrinkled green seeds, what is the phenotypic ratio in the F₂ generation?

A. 9:7

B. 1:2:1

C. 3:1

D. 9:3:3:1

Correct Answer: D

Explanation:

This is a classic dihybrid cross showing independent assortment, resulting in a 9:3:3:1 phenotypic ratio.

Ques 4: What is the main function of spindle fibres during mitosis?

A. Regulate cell growth

B. Separate chromosomes

C. Synthesise DNA

D. Repair DNA

Correct Answer: B

Explanation:

Spindle fibres attach to centromeres and pull sister chromatids apart during cell division.

Ques 5: How many meiotic and mitotic divisions are required to form a mature female gametophyte from a megaspore mother cell in angiosperms?

A. No meiosis and 2 mitosis

B. 2 meiosis and 3 mitosis

C. 1 meiosis and 2 mitosis

D. 1 meiosis and 3 mitosis

Correct Answer: D

Explanation:

One meiosis produces four megaspores, followed by three mitotic divisions to form the embryo sac.

Ques 6: Which of the following statements about antibody structure is NOT correct?

A. Constant regions are at C-terminal

B. Two heavy and two light chains are present

C. Chains are linked by disulfide bonds

D. Antigen binding site is at C-terminal

Correct Answer: D

Explanation:

The antigen-binding site is located at the variable (N-terminal) region, not the C-terminal.

Ques 7: Assertion (A): Tapetum cells have dense cytoplasm and are often multinucleate. Reason (R): Multiple nuclei increase efficiency in nourishing developing pollen.

A. A false, R true

B. Both true, R explains A

C. Both true, R doesn’t explain A

D. A true, R false

Correct Answer: D

Explanation: Tapetum cells are multinucleate (true), but the reason is not the correct explanation given in the NCERT.

Ques 8: In bryophytes, gemmae are involved in:

A. Gaseous exchange

B. Sexual reproduction

C. Asexual reproduction

D. Nutrient absorption

Correct Answer: C

Explanation: Gemmae are vegetative propagules that help in asexual reproduction.

Ques 9: Who proposed that the genetic code consists of triplet nucleotides?

A. Franklin Stahl

B. George Gamow

C. Francis Crick

D. Jacques Monod

Correct Answer: B

Explanation: George Gamow suggested that codons are made of three nucleotides.

Ques 10: Sweet potato (root) and potato (stem) represent which type of evolution?

A. Analogy, divergent

B. Analogy, convergent

C. Homology, divergent

D. Homology, convergent

Correct Answer: B

Explanation: They perform similar functions but have different origins, showing convergent evolution (analogy).

Ques 11: Histone proteins are rich in:

A. Phenylalanine and Arginine

B. Lysine and Arginine

C. Leucine and Lysine

D. Phenylalanine and Leucine

Correct Answer: B

Explanation: Histones are basic proteins rich in lysine and arginine, aiding DNA binding.

Ques 12: Which equation represents logistic population growth?

A. dN/dt = N(r–K/K)

B. dN/dt = r(K–N/K)

C. dN/dt = rN(K–N/K)

D. dN/dt = rN(N–K/N)

Correct Answer: C

Explanation: The logistic growth equation is dN/dt = rN(K–N/K), representing growth with carrying capacity.

Ques 13: Which statement about RuBisCO is correct?

A. Catalyzes carboxylation of RuBP

B. Active only in the dark

C. Higher affinity for oxygen

D. Involved in photolysis

Correct Answer: A

Explanation: RuBisCO catalyzes CO₂ fixation in the Calvin cycle.

Ques 14: The protein part of an enzyme is called:

A. Prosthetic group

B. Cofactor

C. Coenzyme

D. Apoenzyme

Correct Answer: D

Explanation: Apoenzyme is the protein portion; cofactor is the non-protein component.

Ques 15: Which factor is responsible for termination of transcription?

A. Gamma (γ)

B. Alpha (α)

C. Sigma (σ)

D. Rho (ρ)

Correct Answer: D

Explanation:

Rho factor helps terminate transcription in prokaryotes.

Ques 16: Which hormone is released by the pituitary but synthesised in the hypothalamus?

A. ACTH

B. LH

C. ADH

D. FSH

Correct Answer: C

Explanation:

ADH is synthesised in the hypothalamus and stored/released by the posterior pituitary.

Ques 17: Why is insulin not given orally?

A. Increases bioavailability

B. Causes immune response

C. Digested in GI tract

D. Structural variation

Correct Answer: C

Explanation:

Being a protein, insulin gets digested in the digestive tract if taken orally.

Ques 18: RNA interference (RNAi) works due to:

A. Non-complementary ssRNA

B. Complementary dsRNA

C. Inhibitory ssRNA

D. Complementary tRNA

Correct Answer: B

Explanation:

Double-stranded RNA triggers degradation of specific mRNA.

Ques 19: Which enzyme contains haem as a prosthetic group?

A. Catalase

B. RuBisCO

C. Carbonic anhydrase

D. Succinate dehydrogenase

Correct Answer: A

Explanation:

Catalase contains haem and helps in breakdown of hydrogen peroxide.

Ques 20: Which organism was used by Eli Lilly to produce human insulin?

A. Phage

B. Bacterium

C. Yeast

D. Virus

Correct Answer: B

Explanation:

Genetically engineered bacteria (like E. coli) were used to produce human insulin.

NEET 2026 Biology 50 Most Expected Questions PDF with Solutions

To make your Biology preparation for the exam more efficient, we have prepared a PDF that contains the most important NEET questions from the past few years, i.e., from 2023 to 2025. This will make your NEET 2026 preparation efficient, help in revising the key concepts, and other relevant information while preparing for the exams.

Why NEET Biology 50 Most Expected Questions Are Important?

Studying NEET 2026 Biology 50 Most Expected Questions has a number of advantages over simply studying for your exams through regular means:

1. Understanding NEET Exam Pattern

NEET Biology will help you understand how questions are framed and how difficult a question can get in an actual exam.

• Familiarise yourself with high-accuracy types of questions asked (Statement-based, Match the following, etc.)

• Get a fair idea of the importance of various chapters

• Get more confident for your actual exam

2. Revisiting NEET Repeated Chapters

You will notice that concepts from units such as Genetics, Human Physiology, Ecology, and Plant Physiology are repeatedly asked in NEET.

• Easily identify frequently asked chapters

• Focus more on the high-weightage NEET Biology chapters

• Save your time by avoiding chapters you know aren’t important

3. Improving NCERT Concepts

Most of your NEET Biology questions will come from the NCERT. So, it will help you improve your concepts by revising important lines.

• Revise important NCERT statements and diagrams

• Improve your concepts

• Relate your questions to the NCERT

4. Improving Accuracy and Speed

Studying through 50 Most Expected Questions for biology will improve your accuracy and speed, helping you manage your time better for your actual exam.

• Answer your questions quickly

• Avoid negative markings

How to Use NEET Biology 50 Most Expected Questions Effectively?

To score the highest in NEET Biology, you should follow these strategies:

1. Solve NEET Biology 50 most expected questions after completing the NCERT

• You should start practising NEET previous year questions only after completing a chapter from the NCERT book.

• This way, you can directly apply the concepts and get a clear idea of how questions are being framed for a particular topic.

2. Revise incorrect questions and weak topics

• Always analyse your mistakes.

• You should keep a separate book for incorrect questions and revise them regularly to avoid repeating the same mistakes.

3. NCERT diagrams, tables, and examples

• Many questions in the NEET Biology exam are being asked from the diagrams and small points mentioned in the NCERT book.

• Practice the top 100 NCERT based questions for NEET 2026.

• You should focus on diagrams, tables, and points mentioned in the book.

4. Practice Biology most expected questions multiple times before attempting full-length mock tests

• You should not practice most expected questions only once.

• Practice NEET 2026 most expected questions multiple times before moving on to mock tests.

5. Use NEET most expected questions with solutions along with mock tests and revision notes

• Use these questions along with NEET mock tests to get exam temperament.

• Aspirants should revise their short notes daily to improve speed.

30-Day Strategy to Master Most Expected Questions for NEET Biology 2026

If you want to score 320+ or even 340+ in NEET Biology, the last 30 days should be focused on NCERT revision + NEET Biology 2026 most expected questions with solutions. This plan is designed to help you revise efficiently, improve accuracy, and maximise retention.

Week 1 (Days 1–7): Build Strong NCERT + Question Practice Foundation

Focus on completing high-weightage chapters with their most expected questions.

• Revise 2-3 chapters every day from the NCERT text (line by line).

• Solve chapter-wise NEET biology previous year questions immediately after revising chapters.

• Highlight important lines in the NCERT text and frequently asked concepts.

• Focus on units like Human Physiology, Genetics, and Ecology.

• Keep a notebook to write down mistakes and tricky questions.

Week 2 (Days 8-14): Intensive Expected Questions Practice + Concept Clarity

Now, let’s move a step further into deeper practice and weaker areas of understanding.

• Daily practice of mixed expected Questions from all chapters (80-100 questions)

• Study each question carefully. The focus here is not only on the correct solution of the question, but also on the concepts behind it.

• Revise the weaker topics from the NCERT again

• Daily practice of NCERT Biology diagrams and tables

Week 3 (Days 15–21): Full-Length Practice + Revision

This is an important part of preparing for the exam.

• Take full-length NEET Biology mock tests regularly

• Revise all short notes and previously answered Most expected questions.

• Focus on frequently repeating NEET Biology questions

• Work on time management and question selection

• Avoid learning new things. Only focus on revising

Week 4 (Days 22–30): Final Revision + Expected Questions Mastery

The final part of your preparation should be focused on building confidence and maximising your ability to retain things.

• Revise only NCERT, Expected questions and short notes

• Re-solve previously wrong questions

• Focus on high-yield questions and the most repeated questions in NEET exam

• Take light mock tests

• Keep revising light and easy

• Keep revising relaxed and tension-free

Final Preparation Tips for NEET Biology 2026

• Stick to NCERT and avoid unnecessary resources

• Revise Biology daily to retain factual information

• Practice at least 50-100 NEET NCERT-based Biology MCQs daily, including Biology most expected questions.

• Analyse mistakes and avoid repeating them

• Focus more on accuracy than attempting too many questions

Consistency and smart practice using important NEET 2026 Biology 50 most expected questions with solutions can help you achieve a top score.