PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free PSEB SS Biology Practice Questions

Punjab School Education Board (PSEB) Senior Secondary Biology (Class 12 — Biology, subject code 054) practice questions are available now; exam metadata is being verified.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Punjab PSEB Senior Secondary (Class 12) Subjects

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Punjab PSEB Senior Secondary Accountancy

Practice Questions

Punjab PSEB Senior Secondary Agriculture

Practice Questions

Punjab PSEB Senior Secondary Business Studies

Practice Questions

Punjab PSEB Senior Secondary Chemistry

Practice Questions

Punjab PSEB Senior Secondary Commercial Art

Practice Questions

Punjab PSEB Senior Secondary Computer Application

Practice Questions
2026 Statistics

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-aligned Class 12 Biology concepts and calculations.

Sample PSEB SS Biology Practice Questions

Try these sample questions to test your PSEB SS Biology exam readiness. 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 Practice Questions

Verified exam format metadata for Punjab School Education Board (PSEB) Senior Secondary Biology (Class 12 — Biology, subject code 054) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.