Assertion (A): Lysosomes are often referred to as polymorphic organelles.Reason (R): They exist in different forms (primary, secondary, residual bodies, and autophagic vacuoles) depending on their functional state in the cell.

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): Bryophytes are called the amphibians of the plant kingdom.Reason (R): They live in soil but depend on water for sexual reproduction as their male gametes are motile.

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

Which of the following is a primary characteristic feature of all Chordates at some stage of their life cycle?

Presence of a ventral solid nerve cord

Assertion (A): The human AB blood group is a classic example of co-dominance.Reason (R): In the AB blood group, both the IA and IB alleles are fully expressed, producing both A and B antigens on the RBC 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

Assertion (A): During DNA replication, synthesis is continuous on the leading strand but discontinuous on the lagging strand.Reason (R): DNA polymerase can only add nucleotides in the 5' to 3' direction.

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 is often described as a "necessary evil" for plants.Reason (R): While it causes a massive loss of water, it creates the transpiration pull required for the absorption and upward movement of water and minerals.

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 rate at which consumers convert the chemical energy of their food into their own new biomass is known as:

Gross Primary Productivity (GPP)

Assertion (A): Food chains in nature are generally short, rarely exceeding 4 or 5 trophic levels.Reason (R): According to the 10% law, 90% of energy is lost as heat at each trophic level, leaving insufficient energy to support higher levels.

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): The wall of the left ventricle of the human heart is much thicker than that of the right ventricle.Reason (R): The left ventricle has to pump blood at a much higher pressure to all body parts, whereas the right ventricle only pumps blood to the nearby lungs.

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): C4 plants are more photosynthetically efficient than C3 plants under high temperatures and drought.Reason (R): C4 plants lack photorespiration due to the efficient concentration of CO2 in bundle sheath cells by the Hatch-Slack pathway.

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): Plasmids are ideal vectors for gene cloning in recombinant DNA technology.Reason (R): Plasmids can replicate autonomously independently of the chromosomal DNA within a bacterial host cell.

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

What is the functional role of the "Eustachian tube" in the human ear?

To equalize air pressure on both sides of the eardrum

To maintain body balance and posture

To convert sound waves into nerve impulses

Assertion (A): Amniocentesis is a legally ban-able technique if misused for sex determination.Reason (R): Amniocentesis involves sampling amniotic fluid to detect genetic disorders like Down syndrome in the fetus, but it is frequently abused for female foeticide.

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 3

Prakash Joshi August 17, 202630 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 Full length Mock Test – Set 3 (100 Questions) Biology Domain

Prepare with another Premium Full-Length Mock Test for the UKSSSC Pashudhan Prasar Adhikari examination. This set contains 100 objective questions in English & Hindi, covering both the common section and the Graduation-level Biology Stream.

Choose Your Graduation Domain: In Part B, candidates have to attempt one subject according to their graduation-level domain. Set 3 is designed for Biology Stream candidates and focuses on graduation-level Biology concepts.

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 Pattern

Set 3 includes different levels of questions to help you test both basic knowledge and deeper understanding.

Direct Concept MCQs: Important facts, terms, concepts, and definitions.
Match the Following: Questions based on classification, relationships, and connected concepts.
Assertion-Reason: Questions that test conceptual understanding and logical reasoning.

Premium Practice for Better Preparation

Attempt the test in a proper exam-like environment and check the explanations after submission. Use your result to find weak topics and focus your revision on areas where you need more practice.

Note: This is a Biology Stream test for Part B. Candidates who are preparing for the Agriculture Stream should choose 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 2

Uttarakhand Agriculture and Animal Husbandry Practice Test – #1 ➡️