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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

94 Questions
Exam Preparation Guide

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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All Subjects Biology Chemistry Computer Science Current Affairs English Everyday Science General Knowledge Islamic Studies Mathematics Pakistan Studies Physics
51
Biology Medium

What is the deficiency disease caused by lack of Vitamin C?

  • ABeriberi
  • BPellagra
  • CScurvy
  • DRickets
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Correct Answer: Option C — Scurvy
Explanation: Scurvy is caused by Vitamin C deficiency resulting in impaired collagen synthesis which leads to bleeding gums joint pain poor wound healing and weakness.
Submitted by: PaperMCQs
52
Biology Medium

What is the deficiency disease caused by lack of Vitamin D in children?

  • AScurvy
  • BRickets
  • CBeriberi
  • DPellagra
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Correct Answer: Option B — Rickets
Explanation: Rickets is caused by Vitamin D deficiency in children leading to impaired calcium and phosphorus absorption resulting in weak soft and deformed bones.
Submitted by: PaperMCQs
53
Biology Medium

Which vitamin is essential for the formation of collagen and acts as an antioxidant?

  • AVitamin A
  • BVitamin C
  • CVitamin D
  • DVitamin K
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Correct Answer: Option B — Vitamin C
Explanation: Vitamin C is essential for collagen synthesis acting as a cofactor for enzymes that stabilise the collagen triple helix and its deficiency causes scurvy.
Submitted by: PaperMCQs
54
Biology Medium

What is the term for proteins produced by B lymphocytes in response to specific antigens?

  • AAntigens
  • BEnzymes
  • CHormones
  • DAntibodies
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Correct Answer: Option D — Antibodies
Explanation: Antibodies also called immunoglobulins are Y-shaped proteins produced by B lymphocytes that specifically bind to antigens neutralising pathogens and marking them for destruction.
Submitted by: PaperMCQs
55
Biology Medium

What is the term for a substance that triggers an immune response in the body?

  • AAntibody
  • BEnzyme
  • CAntigen
  • DHormone
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Correct Answer: Option C — Antigen
Explanation: An antigen is any substance usually a protein on the surface of a pathogen that is recognised as foreign by the immune system and triggers the production of specific antibodies.
Submitted by: PaperMCQs
56
Biology Hard

Which type of white blood cell produces antibodies against specific pathogens?

  • ANeutrophils
  • BB lymphocytes
  • CMonocytes
  • DEosinophils
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Correct Answer: Option B — B lymphocytes
Explanation: B lymphocytes or B cells are white blood cells that produce specific antibodies when activated by an antigen providing targeted humoral immunity against pathogens.
Submitted by: PaperMCQs
57
Biology Medium

What is the process by which white blood cells engulf and digest bacteria and foreign particles?

  • APhagocytosis
  • BEndocytosis
  • COsmosis
  • DPinocytosis
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Correct Answer: Option A — Phagocytosis
Explanation: Phagocytosis is the process by which phagocytes such as neutrophils and macrophages engulf and digest bacteria foreign particles and dead cells protecting the body from infection.
Submitted by: PaperMCQs
58
Biology Medium

Which type of immunity is present from birth and provides a non-specific first line of defence?

  • AAcquired immunity
  • BActive immunity
  • CPassive immunity
  • DInnate immunity
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Correct Answer: Option D — Innate immunity
Explanation: Innate immunity is the non-specific immune response present from birth providing the first line of defence through physical barriers inflammation and phagocytes against all pathogens.
Submitted by: PaperMCQs
59
Biology Medium

What is the term for the symbiotic relationship where one organism benefits and the other is neither helped nor harmed?

  • AMutualism
  • BParasitism
  • CAmensalism
  • DCommensalism
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Correct Answer: Option D — Commensalism
Explanation: Commensalism is a symbiotic relationship where one organism benefits while the other is neither harmed nor helped such as barnacles attaching to whales for transport.
Submitted by: PaperMCQs
60
Biology Medium

What is the term for the symbiotic relationship where one organism benefits and the other is harmed?

  • AMutualism
  • BCommensalism
  • CAmensalism
  • DParasitism
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Correct Answer: Option D — Parasitism
Explanation: Parasitism is a symbiotic relationship where one organism the parasite benefits at the expense of the other the host causing it harm such as tapeworms in the intestines.
Submitted by: PaperMCQs
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