Assertion (A): Gymnosperms do not produce fruits.Reason (R): In gymnosperms, the ovules are not enclosed by an ovary wall and remain exposed both before and after fertilization.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Assertion (A): Chondrichthyes (cartilaginous fishes) have to swim constantly to avoid sinking.Reason (R): They lack an air bladder, which is responsible for regulating buoyancy.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

The phenomenon of Incomplete Dominance was first discovered in which plant?

Mirabilis jalapa (Four o’clock plant)

Assertion (A): In birds, the sex of the offspring is determined by the female.Reason (R): Birds possess a ZW-ZZ sex determination system where females are heterogametic (ZW) and males are homogametic (ZZ).

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

In DNA packaging, the nucleosome core particle consists of an octamer of which proteins?

Non-histone chromosomal proteins

Assertion (A): The genetic code is degenerate.Reason (R): A single amino acid can be coded for by more than one codon.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Assertion (A): Transpiration helps in the ascent of sap in tall trees.Reason (R): Evaporation of water from leaves creates a negative hydrostatic pressure (transpiration pull) in the xylem.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Assertion (A): Two closely related species competing for the same identical resources cannot coexist indefinitely.Reason (R): This is explained by Gause’s Competitive Exclusion Principle.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Assertion (A): During muscle contraction, the length of the A-band remains constant.Reason (R): According to the Sliding Filament Theory, actin filaments slide over the myosin filaments, reducing the H-zone without shortening the myosin (A-band).

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Assertion (A): Agrobacterium tumefaciens is widely used as a vector in plant genetic engineering.Reason (R): It naturally infects dicot plants and transfers a piece of its Ti plasmid (T-DNA) into the plant genome.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

In the Hardy-Weinberg equation (p² + 2pq + q² = 1), what does the term "2pq" represent?

Frequency of heterozygous individuals

Frequency of homozygous dominant individuals

Frequency of homozygous recessive individuals

Assertion (A): Analogous organs show convergent evolution.Reason (R): They are anatomically similar and have the same developmental origin but perform different functions.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

The "Bohr Effect" describes the shift of the Oxygen-Hemoglobin dissociation curve to the right due to:

High carbon dioxide concentration and low pH

In the human nephron, the "Loop of Henle" primarily functions to:

Concentrate the urine by conserving water

Assertion (A): Blood group O is considered the Universal Donor.Reason (R): Red blood cells of individuals with O blood group do not have A or B antigens on their surface.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

UKSSSC PPA (LEO) – Biology Domain | Mock Test Set 2

Prakash Joshi August 17, 202624 views 100 Questions

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UKSSSC Pashudhan Prasar Adhikari (Livestock Extension officer) 2026

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About this Assessment

UKSSSC Pashudhan Prasar Adhikari Premium Mock Test – Set 2 (100 Questions) for Biology Domain

This is a Premium Full-Length Mock Test for the UKSSSC Pashudhan Prasar Adhikari examination. Set 2 contains 100 objective questions in both English & Hindi, with clear explanations to help you understand the concepts and improve your exam preparation.

Premium Biology Stream: In Part B of the examination, candidates have to attempt one subject based on their graduation-level domain. This test is specially designed for candidates who are preparing for the Biology Stream.

Test Structure

The mock test contains the following two sections:

Section A: General Biology & Environment (30 Questions)
- Level: Senior Secondary (Class 12)
- Coverage: Cell Biology, Biomolecules, Taxonomy, Plant Anatomy, Plant Physiology, Plant Reproduction, Ecology & Environmental Science, including cell structure and division, proteins, carbohydrates and fats, Five Kingdom Classification, angiosperm families, monocot and dicot anatomy, photosynthesis, respiration, transpiration, plant hormones, pollination, double fertilization, seed and fruit development, apomixis, parthenocarpy, polyembryony, pollution, biomagnification, eutrophication, ozone depletion, greenhouse effect, acid rain, Green Revolution, nitrogen cycle, apiculture, sericulture, crop pest management, and microbes in human welfare.
Section B: Biology (70 Questions)
- Level: Graduation
- Stream: Biology
- Coverage: Cell Biology, Genetics, Molecular Biology, Plant Physiology, Human Physiology, Ecology, Taxonomy, Evolution, Biotechnology, DNA Replication, Transcription, C3 and C4 Photosynthesis, Plant Hormones, and other important graduation-level Biology topics.

Question Types

The mock test includes a mix of Easy, Moderate, and Hard questions to provide realistic exam practice.

Concept-Based MCQs: Questions based on important concepts, facts, and definitions.
Match the Following: Questions that test your ability to connect related concepts and information.
Assertion-Reason: Questions designed to test your understanding of concepts and their relationships.

Why Attempt This Premium Test?

This test is designed for serious exam preparation and gives you additional practice beyond the basic test series. Read the explanations after the test to identify your weak areas, revise important concepts, and improve your performance.

Note: This is a Biology Stream test for Part B. Candidates preparing for the Agriculture Stream should attempt the Agriculture-based test.

Written & Verified by Prakash Joshi

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Subject Matter Expert & Content Creator at Solotutes. Dedicated to providing highly accurate and syllabus-oriented study materials for your exam preparation.

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⬅️ UKSSSC PPA (LEO) – Biology Domain | Mock Test Set 1

UKSSSC PPA (LEO) – Biology Domain | Mock Test Set 3 ➡️