Is the official RBSE Senior Secondary (Class 12) Biology exam multiple-choice only?

No. Official RBSE papers mix objective and constructed-response tasks and may include practical/performance components. The 100 questions here are an English-language MCQ study adaptation for concept practice only.

What are full marks and duration for RBSE Biology?

Common scheme: Theory 56 + Sessional 14 = 70 and Practical 30 = 100; 3 hours 15 minutes (theory); practical duration as per subject scheme (commonly ~3–4 hours). Confirm the exact scheme for code 042 in the current RBSE syllabus PDF on rajeduboard.rajasthan.gov.in.

What is the passing score?

Minimum 33% marks in the subject as per RBSE examination regulations (confirm current session circulars). Where theory and practical are separate, candidates must pass each component as required by the subject scheme.

How much does the exam cost?

As per RBSE annual examination fee notification for school/private candidates (Senior Secondary / Class 12 full board form fee is notified each cycle on rajeduboard.rajasthan.gov.in — confirm the current circular; subject papers are not separately priced on the statistics page).

Where are official statistics and syllabus?

Subject-wise 2026 result statistics and board materials are published by RBSE at https://rajeduboard.rajasthan.gov.in/statistics2026.htm and syllabus PDFs under anudeshika / books sections of https://rajeduboard.rajasthan.gov.in. Prefer primary board PDFs over third-party summaries.

Is this bank an official RBSE translation?

No. OpenExamPrep publishes one English-language practice bank per exam ID. Target-language terms and texts may appear when they are integral to the skill, but stems, explanations, and SEO copy are English study adaptations — not official translations or language-environment simulations.

How should I use MCQs for a mixed written/practical paper?

Use MCQs for daily concept drills and self-check. Also practise full written answers from RBSE model papers under timed conditions and complete required practicals, projects, or performances.

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100+ Free RBSE SS Biology Practice Questions

Rajasthan RBSE Senior Secondary (Class 12) Biology — Code 042 practice questions are available now; exam metadata is being verified.

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See RBSE subject-wise statistics for the current cycle on statistics2026.htm. Pass Rate

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2026 Statistics

Key Facts: RBSE SS Biology Exam

042

RBSE subject code for Biology

RBSE 2026 subject-wise statistics

Theory 56 + Sessional 14

Typical full marks / assessment pattern

RBSE syllabus examination scheme

3 h 15 m

Typical theory paper duration (where applicable)

RBSE Class 12 / Praveshika schemes

33%

Common minimum pass threshold under RBSE regulations

RBSE examination regulations (confirm circular)

2026

Main examination cycle evidenced in official subject-wise statistics

rajeduboard.rajasthan.gov.in/statistics2026.htm

MCQ study aid

Local bank adapts knowledge to four-option MCQs; official paper is mixed/performance format

OpenExamPrep assessment-format policy

RBSE Senior Secondary (Class 12) Biology (code 042): Theory 56 + Sessional 14 = 70 and Practical 30 = 100; 3 hours 15 minutes (theory). Pass about 33% per RBSE rules (confirm circular). Fee as per board notification. Free English MCQ study aid — not a full official-format simulation.

Sample RBSE SS Biology Practice Questions

Try these sample questions to test your RBSE 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 male gametophyte is represented by the:

A.Embryo sac

B.Pollen grain

C.Ovule

D.Ovary wall

Explanation: The pollen grain is the male gametophyte. After germination it forms a pollen tube that delivers two male gametes to the embryo sac.

2Double fertilisation in flowering plants produces a zygote and a primary endosperm nucleus that is typically:

A.Haploid (n)

B.Diploid (2n)

C.Triploid (3n)

D.Tetraploid (4n)

Explanation: One male gamete fuses with the egg (syngamy → 2n zygote). The other fuses with the two polar nuclei (triple fusion → 3n primary endosperm nucleus).

3Which tissue nourishes developing pollen grains inside the anther?

A.Endothecium

B.Tapetum

C.Epidermis

D.Middle layer only

Explanation: The tapetum is the innermost anther wall layer and provides nutrition to developing microspores/pollen.

4In a typical angiosperm embryo sac (Polygonum type), how many nuclei are present at maturity before fertilisation?

A.Four

B.Six

C.Seven

D.Eight

Explanation: A mature monosporic embryo sac has 8 nuclei organised as 7 cells: 3 antipodals, 2 synergids, 1 egg, and a large central cell with 2 polar nuclei.

5Apomixis is best described as:

A.Formation of seeds without fertilisation

B.Transfer of pollen to stigma

C.Fusion of two male gametes with egg

D.Shedding of leaves without senescence

Explanation: Apomixis is asexual seed formation—embryos develop without fertilisation, so progeny are clones of the mother plant.

6Self-incompatibility in flowering plants primarily prevents:

A.Cross-pollination by insects

B.Self-pollen from fertilising the same flower or plant

C.Formation of endosperm

D.Meiosis in microspore mother cells

Explanation: Self-incompatibility is a genetic mechanism that rejects self-pollen, promoting outbreeding and genetic diversity.

7Which statement correctly distinguishes monocot and dicot seeds?

A.Monocot seeds always lack endosperm; dicot seeds always have endosperm

B.In maize (monocot), the large food-storage tissue is endosperm; in pea (dicot), food is stored mainly in cotyledons

C.All monocot embryos have two cotyledons

D.All dicot embryos have a single cotyledon

Explanation: Maize is albuminous: endosperm stores food. Pea is non-albuminous: cotyledons store food after endosperm is consumed during seed development.

8Spermatogenesis in humans occurs in the:

A.Epididymis

B.Seminal vesicles

C.Seminiferous tubules

D.Prostate gland

Explanation: Spermatogenesis takes place in the seminiferous tubules of the testes. Sperm then mature further in the epididymis.

9Which hormone primarily triggers ovulation in the human menstrual cycle?

A.FSH only

B.Progesterone

C.LH surge

D.Relaxin

Explanation: A mid-cycle LH surge induces rupture of the mature Graafian follicle and release of the secondary oocyte (ovulation).

10In humans, fertilisation normally occurs in the:

A.Uterus

B.Vagina

C.Ampulla of the fallopian tube

D.Cervix

Explanation: Sperm meet the ovum usually in the ampullary region of the oviduct (fallopian tube), where fertilisation occurs.

About the RBSE SS Biology Practice Questions

Verified exam format metadata for Rajasthan RBSE Senior Secondary (Class 12) Biology — Code 042 is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.

100+ Free RBSE SS Biology Practice Questions

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Key Facts: RBSE SS Biology Exam

Sample RBSE SS Biology Practice Questions

About the RBSE SS Biology Practice Questions