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100+ Free Karnataka II PUC Biology (KSEAB) Practice Questions

Karnataka School Examination and Assessment Board (KSEAB) II PUC Biology Examination (Subject Code 36) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Karnataka II PUC Biology (KSEAB) Exam

36

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)

13

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)

OpenExamPrep

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 test your Karnataka II PUC Biology (KSEAB) exam readiness. 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) Practice Questions

Verified exam format metadata for Karnataka School Examination and Assessment Board (KSEAB) II PUC Biology Examination (Subject Code 36) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.