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Free Practice Questions for Kerala Plus Two Biology (DHSE)

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Exam Review

Key Facts: Kerala Plus Two Biology (DHSE) Exam

Botany + Zoology

Combined Plus Two Biology paper under DHSE Kerala

DHSE Higher Secondary Biology subject structure

TE + CE + Practical

Typical assessment components for Kerala Plus Two Biology

DHSE Kerala HSE evaluation scheme (confirm current circular)

~2.5 h

Common theory (TE) duration for Plus Two Biology written paper

DHSE exam timetable practice (confirm current year)

100

Free OpenExamPrep English practice MCQs (not official item count)

OpenExamPrep

FREE 2026 DHSE Kerala Plus Two Biology English MCQ practice for Class 12 students covering NCERT units from flowering-plant reproduction through biodiversity (Botany + Zoology), with official assessment as TE theory (~2.5 h) plus CE and practical.

Sample Kerala Plus Two Biology (DHSE) Practice Questions

Try these sample questions to review concepts for the Kerala Plus Two Biology (DHSE) exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In angiosperms, the nutritive tissue surrounding microspore mother cells inside the anther is the:
A.Tapetum
B.Epidermis
C.Endosperm
D.Nucellus
Explanation: Tapetum is the innermost wall layer of the microsporangium and nourishes developing microspore mother cells and pollen grains. Epidermis is outer wall; endosperm nourishes the embryo in seeds; nucellus is ovule tissue.
2How many functional megaspores typically remain after megasporogenesis in a Polygonum-type embryo sac?
A.Four functional megaspores
B.One functional megaspore
C.Two functional megaspores
D.Three functional megaspores
Explanation: In the monosporic Polygonum type, the megaspore mother cell undergoes meiosis to form a linear tetrad; usually only the chalazal megaspore remains functional while the other three degenerate.
3Triple fusion in flowering plants involves fusion of:
A.Egg and one male gamete only
B.Two male gametes with two eggs
C.One male gamete with two polar nuclei
D.Synergid with antipodal cells
Explanation: Triple fusion is fusion of one male gamete with the two polar nuclei in the central cell, producing the typically triploid primary endosperm nucleus. Syngamy is separate (egg + other male gamete).
4Geitonogamy differs from xenogamy because in geitonogamy pollen is transferred:
A.Between flowers of different species
B.Within the same closed flower only
C.From stigma to anther of the same flower
D.Between different flowers of the same plant
Explanation: Geitonogamy is pollination between different flowers of the same plant (genetically like selfing). Xenogamy is between flowers of different plants (true cross-pollination).
5Which wall layer of the anther helps in dehiscence by developing fibrous thickenings?
A.Endothecium
B.Tapetum
C.Middle layers only
D.Nucellus
Explanation: Endothecium develops fibrous bands that aid anther dehiscence, releasing pollen. Tapetum is nutritive; middle layers often degenerate; nucellus is ovular.
6Polyembryony means:
A.Formation of multiple fruits from one flower always
B.Occurrence of more than one embryo in a seed
C.Fusion of many pollen tubes only
D.Absence of endosperm in all seeds
Explanation: Polyembryony is the presence of more than one embryo in a seed (e.g., nucellar embryos in citrus). It is not defined as multiple fruits or pollen-tube fusion.
7After fertilization in angiosperms, the ovary wall develops into the:
A.Seed coat
B.Endosperm
C.Pericarp (fruit wall)
D.Plumule
Explanation: The ovary wall becomes the pericarp (fruit wall). Integuments form the seed coat; endosperm nourishes the embryo; plumule is the embryonic shoot.
8Self-incompatibility in flowering plants primarily prevents:
A.Fruit ripening after fertilization
B.Formation of endosperm in all seeds
C.Pollinator attraction by nectar
D.Germination or growth of self-pollen on a genetically related stigma
Explanation: Self-incompatibility is a genetic mechanism that prevents self-pollen from fertilizing ovules of the same plant (or closely related genotypes), promoting outbreeding.
9In a typical dicot ovule, the micropyle is the:
A.Opening through which the pollen tube usually enters
B.Scar where the seed attaches to the fruit
C.Chalazal junction of funicle and nucellus only
D.Layer of endosperm surrounding the embryo sac
Explanation: The micropyle is a small opening in the integuments through which the pollen tube typically enters. The hilum is the seed scar; chalaza is the basal region opposite the micropyle.
10Albuminous seeds are those that:
A.Always lack cotyledons
B.Retain endosperm as a food store in the mature seed
C.Have no embryo axis
D.Form only after apomixis
Explanation: Albuminous (endospermic) seeds retain endosperm as a major food reserve at maturity (e.g., castor, cereals). Exalbuminous seeds store food mainly in cotyledons.

About the Kerala Plus Two Biology (DHSE) Exam

The Kerala Plus Two Biology examination evaluates Higher Secondary Second Year Science students on the NCERT Class 12 Biology syllabus used for DHSE Kerala combined Botany + Zoology: 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, with Class 11 foundations as needed. Official assessment is TE theory plus CE and practical under DHSE. 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: Directorate of Higher Secondary Education (DHSE), Kerala. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Plus Two Biology is assessed as Terminal Evaluation theory (combined Botany + Zoology written paper, commonly about 2.5 hours), Continuous Evaluation (CE), and practical work as notified by DHSE Kerala. Theory follows the year’s scheme of short and long constructed responses with internal choice as applicable. 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 2.5 hours for theory (TE); practical and CE assessed separately (confirm current timetable)

Passing Score

Minimum grade/marks as notified by DHSE Kerala (commonly described near D+ / about 30% under grade rules); always confirm the current circular for TE, CE, and practical requirements

Exam / Certification Fees

HSE / Plus Two examination fee collected through affiliated Higher Secondary schools / DHSE 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.

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.

6%

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.

7%

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.

7%

Microbes in Human Welfare

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

7%

Biotechnology: Principles and Processes

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

6%

Biotechnology and its Applications

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

6%

Organisms and Populations

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

3%

Ecosystem

Ecosystem structure, productivity, decomposition, energy flow, and ecological pyramids.

4%

Biodiversity and Conservation

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

Preparing for the Kerala Plus Two Biology (DHSE) Exam

What You Need to Know

  • Passing score: Minimum grade/marks as notified by DHSE Kerala (commonly described near D+ / about 30% under grade rules); always confirm the current circular for TE, CE, and practical requirements
  • Assessment: Plus Two Biology is assessed as Terminal Evaluation theory (combined Botany + Zoology written paper, commonly about 2.5 hours), Continuous Evaluation (CE), and practical work as notified by DHSE Kerala. Theory follows the year’s scheme of short and long constructed responses with internal choice as applicable. 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 2.5 hours for theory (TE); practical and CE assessed separately (confirm current timetable)
  • Exam / certification fees: HSE / Plus Two examination fee collected through affiliated Higher Secondary schools / DHSE registration as notified for the session Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Kerala Plus Two Biology (DHSE): 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).
2Balance Botany and Zoology revision—DHSE assesses them as one combined Biology paper, so do not over-specialize in only plant or only animal chapters.
3Drill 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.
4Treat practical skills separately: flower dissection, pollen germination, mitosis stages, spotting, physiology experiments, records, and viva still need school lab practice and CE completion.
5Use official DHSE schemes and previous papers for descriptive answer style; use this FREE English MCQ bank for rapid concept checks and weak-unit repair.

Frequently Asked Questions

What does Kerala Plus Two Biology (DHSE) cover?

It follows the NCERT Class 12 Biology units used for Kerala Higher Secondary Biology as a combined Botany + Zoology subject: 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, with Class 11 foundations as needed.

What is the official TE, CE, and practical format?

Biology is assessed as Terminal Evaluation (TE) theory (combined Botany + Zoology written paper, commonly about 2.5 hours), Continuous Evaluation (CE), and practical work. Always verify the current DHSE Kerala circular and scheme of examination for marks split and internal choice.

Is the official exam pure multiple choice?

No. The official paper is a mixed written theory exam with short and long answers plus CE and practical components. 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?

DHSE Kerala does not publish a permanent pure-MCQ item total for Plus Two Biology. Scheme 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 Directorate of Higher Secondary Education (DHSE), Kerala, under the Directorate of General Education, Government of Kerala, conducts Higher Secondary (Plus Two) public examinations.

Where can I find official notifications and schemes?

Check beta.hseportal.kerala.gov.in and related DHSE / Directorate of General Education Kerala portals for the current year’s Biology scheme, timetable, practical guidelines, and result notifications.