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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

1,262 Questions
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How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
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151
Biology Medium

Which scientist developed the modern system of classification for organisms?

  • ACarl Linnaeus
  • BCharles Darwin
  • CGregor Mendel
  • DLouis Pasteur
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Correct Answer: Option A — Carl Linnaeus
Explanation: Carl Linnaeus developed the modern system of biological classification and binomial nomenclature in the 18th century providing a universal system for naming and organising living organisms.
Submitted by: PaperMCQs
152
Biology Medium

What is the two-part Latin naming system for organisms called?

  • APhylogenetic classification
  • BBinomial nomenclature
  • CCladistics
  • DLinnaean classification
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Correct Answer: Option B — Binomial nomenclature
Explanation: Binomial nomenclature is the formal system of naming organisms using two Latin words the genus name and the species name developed by Carl Linnaeus in the 18th century.
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153
Biology Medium

What is the scientific name for the study of classification of organisms?

  • AMorphology
  • BEcology
  • CTaxonomy
  • DPhysiology
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Correct Answer: Option C — Taxonomy
Explanation: Taxonomy is the branch of biology dealing with the classification identification and naming of organisms into a hierarchical system of kingdoms phyla classes orders families genera and species.
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154
Biology Easy

What is the term for organisms that eat both plants and animals?

  • AHerbivores
  • BOmnivores
  • CCarnivores
  • DDetritivores
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Correct Answer: Option B — Omnivores
Explanation: Omnivores are organisms that consume both plant material and other animals obtaining energy and nutrients from a variety of food sources examples include humans bears and pigs.
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155
Biology Easy

Which type of organisms break down dead organic matter into simpler inorganic substances?

  • AProducers
  • BDecomposers
  • CConsumers
  • DOmnivores
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Correct Answer: Option B — Decomposers
Explanation: Decomposers such as bacteria and fungi break down dead organic matter into simpler inorganic substances recycling nutrients back into the ecosystem for use by producers.
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156
Biology Medium

What is the term for the gradual process of change in the species composition of an ecosystem over time?

  • AEvolution
  • BAdaptation
  • CMigration
  • DEcological succession
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Correct Answer: Option D — Ecological succession
Explanation: Ecological succession is the gradual and predictable process of change in species composition and community structure in an ecosystem over time toward a stable climax community.
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157
Biology Medium

What is the term for the variety of different species present in a given habitat?

  • AGenetic diversity
  • BSpecies diversity
  • CEcosystem diversity
  • DBiodiversity
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Correct Answer: Option B — Species diversity
Explanation: Species diversity refers to the number and relative abundance of different species present in a given habitat and is an important measure of the biodiversity of an ecosystem.
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158
Biology Easy

Which type of reproduction in bacteria involves the cell splitting into two equal daughter cells?

  • ABudding
  • BBinary fission
  • CFragmentation
  • DSporulation
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Correct Answer: Option B — Binary fission
Explanation: Binary fission is the primary method of asexual reproduction in bacteria where a single cell replicates its DNA and divides into two genetically identical daughter cells.
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159
Biology Medium

What is the function of lysosomes in animal cells?

  • AProtein synthesis
  • BDigestion of waste materials and cellular debris
  • CEnergy production
  • DDNA storage
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Correct Answer: Option B — Digestion of waste materials and cellular debris
Explanation: Lysosomes are membrane-bound organelles containing digestive enzymes that break down waste materials damaged organelles and foreign substances through a process called autophagy.
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160
Biology Medium

What is the function of the Golgi apparatus in a cell?

  • AEnergy production
  • BProtein synthesis
  • CDNA replication
  • DModifying packaging and dispatching proteins
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Correct Answer: Option D — Modifying packaging and dispatching proteins
Explanation: The Golgi apparatus modifies sorts and packages proteins and lipids received from the endoplasmic reticulum and dispatches them to their correct destinations inside or outside the cell.
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