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CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,939 Questions
Exam Preparation Guide

How to prepare for CSS

CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.

Pakistan AffairsCurrent AffairsEnglishEveryday Science
Combine daily MCQ practice with analytical reading, vocabulary building and regular revision of national and international affairs.
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881
Biology Hard Uploaded: 06 Aug 2026

Which part of a plant is primarily responsible for absorbing water from the soil?

  • AStem
  • BLeaf
  • CRoot
  • DFlower
882
Biology Easy Uploaded: 06 Aug 2026

What is the term for the loss of biodiversity due to species dying out completely?

  • AMigration
  • BExtinction
  • CAdaptation
  • DHibernation
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Biology Medium Uploaded: 06 Aug 2026

Which process converts atmospheric nitrogen into a usable form for plants?

  • APhotosynthesis
  • BRespiration
  • CNitrogen fixation
  • DTranspiration
884
Biology Medium Uploaded: 06 Aug 2026

What is the term for a change in the DNA sequence of an organism?

  • AReplication
  • BTranscription
  • CMutation
  • DTranslation
885
Biology Hard Uploaded: 06 Aug 2026

Which enzyme in saliva begins the digestion of starch?

  • APepsin
  • BAmylase
  • CLipase
  • DTrypsin
886
Biology Easy Uploaded: 06 Aug 2026

What is the term for an organism's habitat and role within an ecosystem?

  • AHabitat
  • BNiche
  • CPopulation
  • DBiome
887
Biology Medium Uploaded: 06 Aug 2026

Which human organ is primarily responsible for filtering blood and producing urine?

  • ALiver
  • BSpleen
  • CPancreas
  • DKidney
888
Biology Medium Uploaded: 06 Aug 2026

What type of bond holds the two strands of DNA together?

  • AIonic bond
  • BCovalent bond
  • CHydrogen bond
  • DMetallic bond
889
Biology Medium Uploaded: 06 Aug 2026

Which vitamin is produced when human skin is exposed to sunlight?

  • AVitamin A
  • BVitamin C
  • CVitamin D
  • DVitamin K
890
Biology Easy Uploaded: 06 Aug 2026

Which molecule carries genetic information in most organisms?

  • ARNA
  • BProtein
  • CLipid
  • DDNA