Free Practice Questions for Karnataka II PUC Biology (KSEAB)

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Key Facts: Karnataka II PUC Biology (KSEAB) Exam

Karnataka II PUC Biology subject code

KSEAB / DPUE Biology blueprint references

~70 / ~30

Typical theory-to-practical marks split for II PUC Biology

Karnataka II PUC science practical-subject scheme (confirm current circular)

NCERT Class 12 Biology rationalised chapter units covered in this bank

NCERT Class 12 Biology rationalisation / Karnataka PU adoption

100

Free OpenExamPrep English practice MCQs (not official item count)

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FREE 2026 KSEAB II PUC Biology (code 36) English MCQ practice for Karnataka Class 12 students covering NCERT rationalised units from flowering-plant reproduction through biodiversity, with official assessment as theory (~70) plus practical (~30).

Sample Karnataka II PUC Biology (KSEAB) Practice Questions

Try these sample questions to review concepts for the Karnataka II PUC Biology (KSEAB) exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In flowering plants, the male gametophyte is represented by the:

A.Embryo sac

B.Pollen grain

C.Ovule

D.Ovary

Explanation: The mature pollen grain is the male gametophyte of angiosperms. After germination it forms a pollen tube that delivers male gametes. The embryo sac is the female gametophyte; ovule and ovary are sporophytic structures.

2Double fertilization in angiosperms produces:

A.Two zygotes

B.A zygote and a primary endosperm nucleus

C.Only endosperm

D.Only a diploid embryo sac

Explanation: One male gamete fuses with the egg (syngamy) to form a diploid zygote; the other fuses with two polar nuclei (triple fusion) to form the triploid primary endosperm nucleus. Together this is double fertilization.

3The mature embryo sac of a typical angiosperm is usually:

A.4-nucleate, 4-celled

B.7-celled, 8-nucleate

C.8-celled, 7-nucleate

D.2-celled, 2-nucleate

Explanation: A typical Polygonum-type embryo sac is 7-celled and 8-nucleate: egg apparatus (egg + two synergids), three antipodals, and a central cell with two polar nuclei.

4Transfer of pollen grains from anther to stigma of the same flower is called:

A.Xenogamy

B.Geitonogamy

C.Autogamy

D.Cleistogamy only

Explanation: Autogamy is self-pollination within the same flower. Geitonogamy is transfer between different flowers of the same plant; xenogamy is between flowers of different plants. Cleistogamy ensures autogamy in closed flowers but is not the general name for all same-flower transfer.

5Which statement about endosperm in angiosperms is correct?

A.It is always diploid and nutritive for the seed coat only

B.It is typically triploid and nourishes the developing embryo

C.It forms before the zygote and is always free-nuclear forever

D.It is haploid tissue derived only from the egg

Explanation: Primary endosperm nucleus is usually triploid (two polar nuclei + one male gamete) and develops into endosperm that nourishes the embryo.

6Apomixis refers to:

A.Formation of seeds without fertilization

B.Fusion of two male gametes only

C.Self-incompatibility preventing fruit set

D.Polyembryony exclusively from nucellus always

Explanation: Apomixis is asexual production of seeds without fertilization, so offspring are maternal clones. It is agriculturally important for fixing hybrid vigor.

7In a typical anther, microspore mother cells are located in the:

A.Epidermis

B.Endothecium

C.Pollen chambers (microsporangia)

D.Tapetum only as mature pollen

Explanation: Each anther lobe usually has two microsporangia (pollen sacs) where microspore mother cells undergo meiosis to form microspores/pollen.

8Filiform apparatus of synergids is important because it:

A.Produces antipodal cells after fertilization

B.Guides the pollen tube into the synergid/egg apparatus region

C.Converts the ovary into fruit without pollination

D.Forms the seed coat from integuments directly

Explanation: The filiform apparatus at the micropylar end of synergids helps guide the pollen tube toward the egg apparatus for successful discharge of male gametes.

9A dicot embryo with two cotyledons typically shows which axial parts at the mature embryo stage?

A.Plumule and radicle only, with no hypocotyl region ever

B.Epicotyl, hypocotyl, plumule, and radicle associated with cotyledons

C.Only endosperm and no embryonic axis

D.Coleoptile and coleorhiza as in all dicots

Explanation: A typical dicot embryo has an embryonal axis with plumule, epicotyl, hypocotyl, and radicle, plus two cotyledons. Coleoptile and coleorhiza are monocot embryo sheaths, not universal dicot features.

10Which pollination type is genetically equivalent to autogamy (same plant genotype) but involves different flowers?

A.Xenogamy

B.Geitonogamy

C.Cleistogamy

D.Hydrophily only

Explanation: Geitonogamy transfers pollen between flowers of the same plant, so genetically it is like self-pollination, though it still requires pollinating agents. Xenogamy is true cross-pollination between different plants.

About the Karnataka II PUC Biology (KSEAB) Exam

The Karnataka II PUC Biology examination (subject code 36) evaluates Class 12 Pre-University Science students on the NCERT Class 12 Biology rationalised syllabus used by Karnataka DPUE / KSEAB: sexual reproduction in flowering plants; human reproduction; reproductive health; principles of inheritance and variation; molecular basis of inheritance; evolution; human health and disease; microbes in human welfare; biotechnology principles and processes; biotechnology applications; organisms and populations; ecosystem; and biodiversity and conservation. Official assessment is theory plus practical under KSEAB. Use this free 2026 English MCQ bank to strengthen concept recall before board writing and practicals—it is a study adaptation, not an official-format simulation.

Exam sponsor: Karnataka School Examination and Assessment Board (KSEAB). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

II PUC Biology is assessed as theory (commonly 70 marks, about 3 hours) plus practical (commonly 30 marks). Theory follows the KSEAB / DPUE blueprint for subject code 36 (mixed objective-style and constructed-response sections with internal choice). Practical covers experiments, slide work, spotting, records, and viva as notified. Official papers are not pure English MCQ; this free bank is an English-language MCQ study adaptation for NCERT-focused concept practice only.

Time Limit

About 3 hours for theory; practical assessed separately (confirm current timetable)

Passing Score

Minimum marks in theory and practical as notified by KSEAB for the year (science practical subjects commonly cited near 21/70 theory plus practical rules); always confirm the current circular

Exam / Certification Fees

II PUC examination fee collected through affiliated PU colleges / KSEAB registration as notified for the session

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Karnataka School Examination and Assessment Board (KSEAB): official exam information

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

10%

Sexual Reproduction in Flowering Plants

Flower structure, microsporogenesis and megasporogenesis, pollination, double fertilization, endosperm, embryo, seed and fruit, apomixis and polyembryony.

10%

Human Reproduction

Male and female reproductive systems, gametogenesis, menstrual cycle, fertilization, implantation, pregnancy, placenta, parturition, and lactation.

Reproductive Health

Reproductive health problems, contraception, medical termination of pregnancy, STIs, infertility, and assisted reproductive technologies.

12%

Principles of Inheritance and Variation

Mendelian inheritance, incomplete dominance, co-dominance, multiple alleles, polygenic traits, chromosomal theory, linkage, sex determination, mutation, and genetic disorders.

12%

Molecular Basis of Inheritance

DNA and RNA structure, replication, transcription, genetic code, translation, regulation of gene expression, Human Genome Project, and DNA fingerprinting.

Evolution

Origin of life, evidence of evolution, adaptive radiation, natural selection, Hardy–Weinberg principle, and human evolution.

10%

Human Health and Disease

Pathogens and parasites, immunity, vaccines, AIDS, cancer, and common drugs and alcohol abuse.

Microbes in Human Welfare

Microbes in household products, industrial products, sewage treatment, biogas, biocontrol agents, and biofertilizers.

Biotechnology: Principles and Processes

Principles of biotechnology, tools of recombinant DNA technology, processes of rDNA technology, PCR, and bioreactors.

Biotechnology and its Applications

Biotechnological applications in agriculture and medicine, transgenic organisms, gene therapy, molecular diagnosis, and ethical issues.

Organisms and Populations

Population attributes, population growth, life-history variation, and population interactions (rationalised NCERT focus).

Ecosystem

Ecosystem structure, productivity, decomposition, energy flow, and ecological pyramids (rationalised NCERT focus).

Biodiversity and Conservation

Biodiversity patterns and importance, loss of biodiversity, and in-situ and ex-situ conservation strategies.

Preparing for the Karnataka II PUC Biology (KSEAB) Exam

What You Need to Know

Passing score: Minimum marks in theory and practical as notified by KSEAB for the year (science practical subjects commonly cited near 21/70 theory plus practical rules); always confirm the current circular
Assessment: II PUC Biology is assessed as theory (commonly 70 marks, about 3 hours) plus practical (commonly 30 marks). Theory follows the KSEAB / DPUE blueprint for subject code 36 (mixed objective-style and constructed-response sections with internal choice). Practical covers experiments, slide work, spotting, records, and viva as notified. Official papers are not pure English MCQ; this free bank is an English-language MCQ study adaptation for NCERT-focused concept practice only.
Time limit: About 3 hours for theory; practical assessed separately (confirm current timetable)
Exam / certification fees: II PUC examination fee collected through affiliated PU colleges / KSEAB registration as notified for the session Official sources

Using Our Practice Resources

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Karnataka II PUC Biology (KSEAB): Suggested Study Strategy

1Map every miss back to the matching NCERT Class 12 chapter and redraw key diagrams (embryo sac, male/female reproductive systems, DNA replication, lac operon, pyramids of energy).

2Drill high-yield numbers: monohybrid 3:1, dihybrid 9:3:3:1, test-cross 1:1:1:1, codon triplets, Hardy–Weinberg p² + 2pq + q² = 1, and 10% energy transfer.

3Practice both LOTS recall and HOTS application items—the official blueprint mixes 1-mark through 5-mark constructed responses.

4Treat practical skills separately: pollen germination, mitosis stages, spotting, physiology experiments, records, and viva still need college lab practice.

5Use official KSEAB model papers for descriptive answer style; use this FREE English MCQ bank for rapid concept checks and weak-unit repair.

Frequently Asked Questions

What does Karnataka II PUC Biology (KSEAB code 36) cover?

It follows the NCERT Class 12 Biology rationalised units used for Karnataka II PUC: sexual reproduction in flowering plants; human reproduction; reproductive health; inheritance and variation; molecular basis of inheritance; evolution; human health and disease; microbes in human welfare; biotechnology principles and applications; organisms and populations; ecosystem; and biodiversity and conservation.

What is the official theory and practical format?

Biology is commonly assessed as about 70 marks theory (about 3 hours, mixed 1-/2-/3-/5-mark items with choice as per the blueprint) plus about 30 marks practical. Always verify the current KSEAB/DPUE circular and model paper for the exact scheme.

Is the official exam pure multiple choice?

No. The official paper is a mixed written theory exam with short and long answers plus a practical component. This free bank is an English-language MCQ study adaptation for concept practice only—not an official-format simulation or translation of the board paper.

Why does examQuestions say not-published?

KSEAB does not publish a permanent pure-MCQ item total for II PUC Biology. Blueprint section marks and internal choice change how many items candidates attempt. This practice bank therefore uses examQuestions not-published and provides 100 free MCQs for revision only.

Who administers the exam?

The Karnataka School Examination and Assessment Board (KSEAB) conducts II PUC public examinations. Syllabus and textbooks for Pre-University subjects are coordinated with the Department of Pre-University Education (DPUE), Karnataka.

Where can I find official model papers and blueprints?

Check kseab.karnataka.gov.in and Department of Pre-University Education / related exam portals (including notices often linked from pue.karnataka.gov.in and dpue-exam.karnataka.gov.in) for the current year’s Biology (36) model papers, blueprints, and practical schemes.

Free Practice Questions for Karnataka II PUC Biology (KSEAB)

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