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Free Practice Questions for PSEB SS Biology

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Key Facts: PSEB SS Biology Exam

70 + 25 + 5

PSEB Senior Secondary Biology Theory + Practical + INA mark split

PSEB Class 12 Scheme of Studies / Biology syllabus

3 hours

Typical PSEB Senior Secondary Biology theory exam duration

Common Class 12 theory logistics / confirm on pseb.ac.in

33%

Separate pass floor in Theory, Practical, INA, and aggregate

PSEB Class 12 Scheme of Studies

Code 054

Biology subject code on PSEB Senior Secondary materials

PSEB Scheme of Studies / syllabus

English MCQ adaptation

This free local bank is not the official Senior Secondary paper format

OpenExamPrep practice policy

PSEB Senior Secondary Biology is a Class 12 public-exam subject with Theory 70 + Practical 25 + INA 05 (about 3 hours theory; code 054) and 33% pass separately in theory, practical, INA, and aggregate — not a pure MCQ board paper. This free 2026 bank is an English MCQ study adaptation for NCERT/PSEB-focused Class 12 Biology concepts and calculations.

Sample PSEB SS Biology Practice Questions

Try these sample questions to review concepts for the PSEB SS Biology exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In angiosperms, the mature male gametophyte is best represented by the:
A.Germinated pollen grain with two male gametes
B.Pollen mother cell
C.Microspore mother cell
D.Tapetal cell
Explanation: A mature pollen grain germinates to form a pollen tube carrying two male gametes (from the generative cell) and a vegetative nucleus — that structure is the male gametophyte.
2A typical mature embryo sac in flowering plants is:
A.8-celled, 7-nucleate
B.7-celled, 8-nucleate
C.6-celled, 8-nucleate
D.8-celled, 8-nucleate
Explanation: The Polygonum-type embryo sac has seven cells and eight nuclei: egg apparatus (egg + 2 synergids), three antipodals, and one central cell with two polar nuclei.
3Double fertilisation in angiosperms results in:
A.A diploid zygote only
B.A triploid endosperm only
C.A diploid zygote and a triploid endosperm
D.Two diploid zygotes
Explanation: One male gamete fuses with the egg (syngamy → diploid zygote); the other fuses with the two polar nuclei (triple fusion → triploid primary endosperm nucleus).
4Which anther wall layer nourishes developing pollen grains?
A.Epidermis
B.Endothecium
C.Middle layer only
D.Tapetum
Explanation: The tapetum is the innermost wall layer of the anther and provides nutrition to developing microspores/pollen.
5Apomixis is best defined as:
A.Seed formation without fertilisation
B.Fruit formation without seeds
C.Pollen transfer without pollinators
D.Embryo development only after double fertilisation
Explanation: Apomixis produces seeds asexually without fertilisation, so offspring are genetically identical to the maternal parent.
6In a typical flowering plant, the filiform apparatus is associated with:
A.Antipodal cells
B.Synergid cells
C.Central cell alone
D.Nucellus cells
Explanation: Synergids have a filiform apparatus that guides the pollen tube toward the egg apparatus for fertilisation.
7Self-incompatibility in flowering plants primarily prevents:
A.Cross-pollination
B.Seed dispersal
C.Self-pollen fertilisation
D.Fruit ripening
Explanation: Self-incompatibility is a genetic mechanism that prevents self-pollen from fertilising the ovule, promoting outbreeding.
8After triple fusion, the primary endosperm nucleus is typically:
A.Haploid (n)
B.Diploid (2n)
C.Tetraploid (4n)
D.Triploid (3n)
Explanation: Two polar nuclei (n + n) fuse with one male gamete (n) to form a triploid (3n) primary endosperm nucleus in most angiosperms.
9Polyembryony means:
A.Occurrence of more than one embryo in a seed
B.Formation of fruit without fertilisation
C.Development of embryo without endosperm
D.Production of unisexual flowers only
Explanation: Polyembryony is the presence of more than one embryo in a single seed (e.g., citrus nucellar embryos).
10A dicot seed in which food is stored mainly in cotyledons with scant endosperm is called:
A.Albuminous seed
B.Non-albuminous (exalbuminous) seed
C.Endospermic seed
D.Perispermic seed only
Explanation: Non-albuminous (exalbuminous) seeds have little or no residual endosperm because food was transferred to cotyledons (e.g., pea, bean).

About the PSEB SS Biology Exam

Punjab Senior Secondary Biology under PSEB covers Class 12 Biology aligned to the Board’s Senior Secondary syllabus and NCERT-style Class 12 Biology. Core theory units include sexual reproduction in flowering plants and humans, reproductive health, inheritance and molecular genetics, evolution, human health and diseases, microbes in human welfare, biotechnology principles and applications, and ecology (populations, ecosystems, biodiversity). Official assessment is Theory 70 + Practical 25 + INA 05 (subject code 054; theory about 3 hours). Pass requires 33% separately in Theory, Practical, and INA and 33% aggregate per the Scheme of Studies. This free local bank provides English four-option MCQs for revision; pair it with official syllabus PDFs, written/diagram practice, and practical/INA work via pseb.ac.in.

Exam sponsor: Punjab School Education Board (PSEB). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

PSEB Senior Secondary Biology is a Class 12 subject under the Senior Secondary Certificate Examination (subject code 054) with Theory 70 + Practical 25 + INA 05 = 100. Official logistics describe about 3 hours of theory work. Syllabus is PSEB/NCERT Class 12 Biology-aligned: Unit I Reproduction (16 marks), Unit II Genetics and Evolution (18), Unit III Biology and Human Welfare (12), Unit IV Biotechnology and its Applications (10), and Unit V Ecology and Environment (14). English, Punjabi, and Hindi media may be available; this practice bank is an English-language MCQ study adaptation. Confirm the current syllabus PDF, Scheme of Studies, and circulars on pseb.ac.in.

Time Limit

3 hours

Passing Score

33% separately in Theory, Practical, and INA, and 33% in aggregate

Exam / Certification Fees

As notified by PSEB and paid through affiliated schools for regular and compartment/improvement sittings (no single fixed public subject fee for all categories).

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.

~23% of this local bank

Reproduction (Unit I)

Flowering plants, human reproduction, and reproductive health.

~26% of this local bank

Genetics and Evolution (Unit II)

Mendelian genetics, molecular inheritance, and evolution.

~17% of this local bank

Biology and Human Welfare (Unit III)

Human health and diseases; microbes in human welfare.

~14% of this local bank

Biotechnology (Unit IV)

rDNA principles/processes and biotech applications.

~20% of this local bank

Ecology and Environment (Unit V)

Populations, ecosystems, and biodiversity conservation.

Preparing for the PSEB SS Biology Exam

What You Need to Know

  • Passing score: 33% separately in Theory, Practical, and INA, and 33% in aggregate
  • Assessment: PSEB Senior Secondary Biology is a Class 12 subject under the Senior Secondary Certificate Examination (subject code 054) with Theory 70 + Practical 25 + INA 05 = 100. Official logistics describe about 3 hours of theory work. Syllabus is PSEB/NCERT Class 12 Biology-aligned: Unit I Reproduction (16 marks), Unit II Genetics and Evolution (18), Unit III Biology and Human Welfare (12), Unit IV Biotechnology and its Applications (10), and Unit V Ecology and Environment (14). English, Punjabi, and Hindi media may be available; this practice bank is an English-language MCQ study adaptation. Confirm the current syllabus PDF, Scheme of Studies, and circulars on pseb.ac.in.
  • Time limit: 3 hours
  • Exam / certification fees: As notified by PSEB and paid through affiliated schools for regular and compartment/improvement sittings (no single fixed public subject fee for all categories). 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

PSEB SS Biology: Suggested Study Strategy

1Redraw standard diagrams (embryo sac, T.S. of anther, sperm/ovum, DNA replication fork, lac operon outline, ecological pyramids) after each MCQ set.
2For genetics numericals, write genotype/phenotype tables and ratios before selecting options; check for incomplete dominance and sex linkage traps.
3Hardy–Weinberg: practice p² + 2pq + q² = 1 with allele frequency first, then genotype frequencies.
4Link biotech tools to purpose: restriction enzymes cut, ligase joins, vectors carry, PCR amplifies — common objective discriminators.
5Do not neglect Practical (25) and INA (5) — pass requires 33% in each component as well as aggregate.
6Use current PSEB Class 12 Biology syllabus and Scheme of Studies materials from pseb.ac.in to allocate revision time among the five theory units and practicals.

Frequently Asked Questions

How is PSEB Senior Secondary Biology officially examined?

Biology is examined under the Punjab Senior Secondary Certificate Examination as a Class 12 subject with Theory 70 marks, Practical 25 marks, and INA 05 marks (total 100). Subject code is 054. Confirm the year’s syllabus PDF, Scheme of Studies, date sheet, and circulars on pseb.ac.in.

Is this practice bank the same format as the official Senior Secondary Biology paper?

No. Official PSEB Class 12 Biology theory papers mix objective and subjective (short/long, diagram, reasoning) sections, plus a separate practical exam and INA. This bank is an English-language multiple-choice study adaptation for concepts and numericals only — not an official translation, blueprint replica, or full written-paper simulation.

What syllabus does this bank follow?

It covers topics from PSEB Senior Secondary (Class 12) Biology / NCERT Class 12 Biology style scope: Unit I Reproduction, Unit II Genetics and Evolution, Unit III Biology and Human Welfare, Unit IV Biotechnology and its Applications, and Unit V Ecology and Environment, using the official unit mark weights as a distribution guide for this bank.

What is the pass mark for PSEB Senior Secondary Biology?

Per the PSEB Class 12 Scheme of Studies, candidates must secure 33% separately in Theory, Practical, and INA (project/internal), and 33% in the aggregate. Always verify the current PSEB Senior Secondary notification for exact criteria for your sitting.

Where should I check official syllabus and date sheets?

Use the Punjab School Education Board website at pseb.ac.in for Class 12 syllabus entries (including Biology code 054), Scheme of Studies, date sheets, and exam circulars. Biology syllabus PDFs are published under PSEB static media for the session.

What languages are used for PSEB Class 12 Biology?

PSEB may offer English, Punjabi, and Hindi media depending on school offerings. This free practice bank is an English-language MCQ study adaptation only.