Is the official RBSE Senior Secondary (Class 12) Agricultural 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 Agricultural 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 039 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 Agricultural Biology Practice Questions

Rajasthan RBSE Senior Secondary (Class 12) Agricultural Biology — Code 039 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 Agricultural Biology Exam

039

RBSE subject code for Agricultural 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) Agricultural Biology (code 039): 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 Agricultural Biology Practice Questions

Try these sample questions to test your RBSE SS Agricultural Biology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1The primary objective of plant breeding is to:

A.Reduce genetic diversity intentionally without purpose

B.Develop improved cultivars with higher yield, quality, and stress resistance

C.Eliminate all sexual reproduction in crops

D.Convert all crops into pure animals

Explanation: Plant breeding creates improved varieties combining higher yield, better quality, pest/disease resistance, and adaptation.

2Pure-line selection is most applicable to which type of crop?

A.Highly cross-pollinated crops only without selfing

B.Self-pollinated crops where homozygous lines can be selected

C.Animals exclusively

D.Bacteria without genomes

Explanation: Pure-line selection isolates superior homozygous plants in self-pollinated crops and multiplies them true-to-type.

3Mass selection differs from pure-line selection mainly because mass selection:

A.Always produces a single homozygous genotype only

B.Selects and bulks many desirable plants, retaining more heterogeneity

C.Uses only molecular markers without phenotypes

D.Requires double haploids exclusively

Explanation: Mass selection saves seed from many selected plants, so the variety remains a mixture of genotypes (more variable than a pure line).

4Hybrid vigor (heterosis) is best defined as:

A.Inferior performance of F1 compared with parents

B.Superior performance of F1 hybrids relative to the parental lines

C.Complete sterility of all hybrids always

D.Absence of any genetic difference between parents

Explanation: Heterosis is the superiority of the hybrid over its parents in yield, vigor, or other traits.

5Emasculation in plant hybridization means:

A.Removing female organs before pollination

B.Removing male reproductive parts (anthers) from the flower to prevent self-pollination

C.Killing the entire plant

D.Applying herbicide to the roots only

Explanation: Emasculation removes anthers from the female parent flower so controlled cross-pollination can be done without selfing.

6A clone in plant propagation is:

A.A sexually produced segregating progeny

B.A vegetatively propagated individual genetically identical to the parent

C.A randomly mated bulk population only

D.A mutagenized seed lot always

Explanation: Clones arise by asexual means (cuttings, tubers, tissue culture) and are genetically identical (barring mutation).

7Backcross breeding is especially useful for:

A.Transferring one or a few desirable genes (e.g., disease resistance) into an elite recurrent parent

B.Creating maximum random polyploidy only

C.Eliminating all selection forever

D.Measuring soil EC only

Explanation: Backcrossing repeatedly crosses progeny to the elite parent while selecting for a target gene from the donor.

8Inbreeding depression is most severe in which mating system historically?

A.Highly self-pollinated crops already homozygous

B.Cross-pollinated crops that are suddenly selfed

C.Apomictic clones that never recombine

D.Vegetatively propagated true clones without seed

Explanation: Cross-pollinated species hide deleterious recessives in heterozygous state; forced selfing exposes them, causing depression.

9The Green Revolution in wheat and rice largely depended on breeding for:

A.Only ornamental flower color without yield

B.Semi-dwarf, fertilizer-responsive, high-yielding varieties

C.Complete elimination of irrigation need forever

D.Removal of all disease resistance genes

Explanation: Semi-dwarf HYVs with stiff straw responded to fertilizer and irrigation, raising cereal yields dramatically.

10Polyploidy breeding has been important in crops such as:

A.Only haploid bacteria

B.Many crops including bread wheat (allohexaploid) and some fruit/forage species

C.Mammals exclusively

D.Viruses without DNA/RNA

Explanation: Polyploid crops (e.g., wheat 6x, potato 4x, many fruits) exploit genome duplication/hybridization for traits and fertility systems.

About the RBSE SS Agricultural Biology Practice Questions

Verified exam format metadata for Rajasthan RBSE Senior Secondary (Class 12) Agricultural Biology — Code 039 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 Agricultural Biology Practice Questions

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Key Facts: RBSE SS Agricultural Biology Exam

Sample RBSE SS Agricultural Biology Practice Questions

About the RBSE SS Agricultural Biology Practice Questions