NCERT Exemplar Class 12th Biology Problem Solution PDF

For Class 12 students who find Biology heavy with diagrams and concepts, the NCERT Exemplar acts as a strong support tool. It helps them move beyond memorization and understand biological ideas in a more connected and meaningful way.

The NCERT Exemplar Class 12 Biology is aligned with the CBSE exam pattern and focuses on application and reasoning-based questions. It helps build conceptual clarity and exam readiness, with chapter-wise PDFs, solved questions, and a simple way to use it effectively.

Download Class 12 NCERT Biology PDF

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NCERT Exemplar Class 12 Biology Overview

The NCERT Exemplar Class 12 Biology is a powerful companion that helps students move from basic understanding to deeper conceptual clarity. While the NCERT textbook builds the foundation, the example strengthens it through application-based questions.

As per the latest CBSE curriculum, it focuses on key areas like Genetics, Biotechnology, Human Physiology, and Ecology, helping students prepare for both board and competitive exams with better confidence.

Key highlights of the NCERT Class 12 Biology Exemplar:

• Complete coverage of the latest NCERT Class 12 Biology syllabus across all chapters
• Mix of MCQs, assertion–reason, case-based, and descriptive questions for varied practice
• Strong focus on concept clarity with diagram-based and process-oriented learning
• Builds analytical thinking and scientific reasoning skills
• Encourages deeper understanding of biological systems and real-life applications
• Useful for strengthening preparation for both CBSE board exams and competitive exams

NCERT Exemplar Biology vs NCERT Biology Textbook

To understand how NCERT Exemplar Biology differs from the NCERT textbook, it’s important to see how each supports learning. While the textbook builds strong basics, the Exemplar focuses on application and deeper understanding.

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Chapter-wise Biology Exemplar Questions

The NCERT Class 12 Biology Exemplar focuses on understanding processes and concepts, not just memorizing facts. Let’s look at a few sample questions to get a feel of it:

Chapter 1: Reproduction in Organisms

Q1. Which of the following statements is incorrect?

A) Asexual reproduction produces genetically identical offspring
B) Sexual reproduction involves fusion of gametes
C) Offspring in sexual reproduction are always identical to parents
D) Variation is more common in sexual reproduction

Answer: C

Q2. Organisms reproducing by fragmentation include:

A) Hydra
B) Spirogyra
C) Yeast
D) Amoeba

Answer: B

Chapter 2: Sexual Reproduction in Flowering Plants

Q1. Double fertilization involves:

A) One male gamete
B) Two female gametes
C) Two male gametes
D) Three male gametes

Answer: C

Q2. The structure that develops into fruit is:

A) Ovule
B) Ovary
C) Embryo sac
D) Endosperm

Answer: B

Chapter 3: Human Reproduction

Q1. Capacitation of sperm occurs in:

A) Testis
B) Epididymis
C) Female reproductive tract
D) Vas deferens

Answer: C

Q2. Which hormone is responsible for ovulation?

A) FSH
B) LH
C) Estrogen
D) Progesterone

Answer: B

Chapter 4: Reproductive Health

Q1. Which contraceptive method prevents implantation?

A) Condoms
B) Oral pills
C) IUDs
D) Vasectomy

Answer: C

Q2. MTP is generally considered safe during:

A) First trimester
B) Second trimester
C) Third trimester
D) After birth

Answer: A

Chapter 5: Principles of Inheritance and Variation

Q1. A cross AaBb × AaBb produces how many phenotypes?

A) 2
B) 4
C) 9
D) 16

Answer: B

Q2. Incomplete dominance results in:

A) One phenotype
B) Two phenotypes
C) Three phenotypes
D) Four phenotypes

Answer: C

Chapter 6: Molecular Basis of Inheritance

Q1. Which enzyme synthesizes RNA primer?

A) DNA polymerase
B) Primase
C) Ligase
D) Helicase

Answer: B

Q2. The lagging strand is synthesized:

A) Continuously
B) Discontinuously
C) Randomly
D) Bidirectionally

Answer: B

Chapter 7: Evolution

Q1. Analogous organs are a result of:

A) Divergent evolution
B) Convergent evolution
C) Adaptive radiation
D) Mutation

Answer: B

Q2. Hardy-Weinberg equilibrium is disturbed by:

A) Random mating
B) Large population
C) Gene migration
D) No mutation

Answer: C

Chapter 8: Human Health and Disease

Q1. Interferons are produced in response to:

A) Bacteria
B) Viruses
C) Fungi
D) Protozoa

Answer: B

Q2. Which cell type is affected by HIV?

A) RBC
B) B lymphocytes
C) T helper cells
D) Platelets

Answer: C

Chapter 9: Strategies for Enhancement in Food Production

Q1. Hybrid vigor is known as:

A) Mutation
B) Heterosis
C) Inbreeding
D) Selection

Answer: B

Q2. Which organism is used in single-cell protein?

A) Rhizobium
B) Spirulina
C) Penicillium
D) Lactobacillus

Answer: B

Chapter 10: Microbes in Human Welfare

Q1. Antibiotics are effective against:

A) Viruses
B) Bacteria
C) Protozoa
D) Algae

Answer: B

Q2. Methanogens are found in:

A) Soil
B) Rumen
C) Water
D) Air

Answer: B

Chapter 11: Biotechnology: Principles and Processes

Q1. Restriction enzymes cut DNA at:

A) Random sites
B) Specific sequences
C) Start codon
D) Stop codon

Answer: B

Q2. Vector used in gene cloning:

A) Ribosome
B) Plasmid
C) mRNA
D) tRNA

Answer: B

Chapter 12: Biotechnology and its Applications

Q1. RNA interference is used to:

A) Increase gene expression
B) Silence gene expression
C) Replicate DNA
D) Repair genes

Answer: B

Q2. Golden rice is rich in:

A) Iron
B) Vitamin A
C) Protein
D) Vitamin C

Answer: B

Chapter 13: Organisms and Populations

Q1. Logistic growth occurs when:

A) Resources are unlimited
B) Carrying capacity exists
C) No competition
D) No death rate

Answer: B

Q2. Competition leads to:

A) Cooperation
B) Extinction
C) Mutualism
D) Parasitism

Answer: B

Chapter 14: Ecosystem

Q1. Pyramid of energy is always:

A) Inverted
B) Upright
C) Linear
D) Circular

Answer: B

Q2. 10% law is related to:

A) Population growth
B) Energy transfer
C) Mutation
D) Evolution

Answer: B

Chapter 15: Biodiversity and Conservation

Q1. Endemic species are:

A) Found everywhere
B) Restricted to a region
C) Migratory
D) Extinct

Answer: B

Q2. Red Data Book contains:

A) Economic data
B) Endangered species
C) Climate data
D) Soil data

Answer: B

Chapter 16: Environmental Issues

Q1. Biomagnification affects:

A) Producers
B) Top consumers
C) Decomposers
D) All equally

Answer: B

Q2. Eutrophication is caused by:

A) Air pollution
B) Nutrient enrichment
C) Noise pollution
D) Radiation

Answer: B

How to Make the Best Use of Biology NCERT Exemplar

The NCERT Exemplar is most effective when used as a practice tool after building a clear understanding from the NCERT textbook. It is not about rushing through questions, but about strengthening concepts step by step and improving how biology is understood and applied in different situations.

• Start only after finishing the NCERT textbook once, so concepts are already familiar.
• Don’t try to solve everything in one go. Focus on one chapter at a time for better clarity.
• While solving, keep NCERT open to quickly revise related diagrams and processes.
• Mark questions that feel confusing instead of skipping them, and revisit them after revision.
• Try to understand why an answer is correct, not just what the answer is.
• Use wrong answers as clues as they show exactly which concept is still weak.
• Practice writing answers in steps, especially for long and reasoning-based questions.
• Revisit the same chapter after a few days to check if concepts are still clear.
• Combine Exemplar practice with diagram revision, since Biology questions often depend on visuals.
• Treat it like a thinking exercise, not a test as this builds real understanding over time.

Benefits of Using NCERT Biology Exemplar

Don’t treat it like a regular question bank. Use it in a way that slowly builds your thinking ability, not just practice.

• Don’t solve it immediately after reading. First, quickly scan questions and predict what concept they are testing.
• Read options carefully and try to eliminate wrong choices before finding the correct one.
• Pause after each question and think: “Where have I seen this idea in NCERT?” This builds strong linkage.
• Try answering in your mind first before checking NCERT or notes as this improves recall speed.
• Notice diagram-based questions separately and connect them with the exact NCERT figure or flowchart.
• After solving, rewrite only the logic of the answer in 2-3 lines instead of full solutions.
• Group similar mistakes together (like confusion in terms, cycles, or processes) instead of treating them separately.
• Revisit only wrong questions after a gap, not the full set. This saves time and improves weak areas faster.
• Mix chapters while revising Exemplar so your brain learns to switch topics quickly like in exams.
• Treat each question as a “mini concept check” instead of a test question. This reduces pressure and improves clarity.

FAQs

Q1. What is NCERT Exemplar for Class 12 Biology?

Ans. It is a supplementary book with advanced, application-based questions that improve conceptual understanding.

Q2. Are NCERT Exemplar questions important for exams?

Ans. Yes, they help develop analytical thinking and closely match board exam patterns.

Q3. Is the NCERT Class 12 Biology Exemplar available chapter-wise?

Ans. Yes, you can access it as a full PDF or chapter-wise.

Q4. Are exemplar questions tougher than NCERT textbook questions?

Ans. Yes, they are more application-based and require deeper understanding.

Q5. When should students solve NCERT Exemplar Biology?

Ans. Ideally, right after completing each chapter from the NCERT textbook.