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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

1,262 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
181
Biology Easy

What is the term for the movement of substances from high concentration to low concentration without energy?

  • AActive transport
  • BOsmosis
  • CEndocytosis
  • DDiffusion
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Correct Answer: Option D — Diffusion
Explanation: Diffusion is the passive movement of particles from a region of high concentration to low concentration down a concentration gradient without requiring cellular energy.
Submitted by: PaperMCQs
182
Biology Medium

What is the term for the movement of water from a region of high water concentration to low concentration through a semipermeable membrane?

  • ADiffusion
  • BOsmosis
  • CActive transport
  • DEndocytosis
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Correct Answer: Option B — Osmosis
Explanation: Osmosis is the movement of water molecules through a semipermeable membrane from a region of high water potential to low water potential without requiring energy.
Submitted by: PaperMCQs
183
Biology Medium

What is the term for the process by which plants lose water vapour through their leaves?

  • APhotosynthesis
  • BOsmosis
  • CTranspiration
  • DRespiration
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Correct Answer: Option C — Transpiration
Explanation: Transpiration is the process by which plants lose water vapour through stomata in their leaves creating a suction force that draws water and minerals up from the roots.
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184
Biology Easy

How many chambers does the human heart have?

  • ATwo
  • BThree
  • CFour
  • DFive
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Correct Answer: Option C — Four
Explanation: The human heart has four chambers two upper atria that receive blood and two lower ventricles that pump blood ensuring separation of oxygenated and deoxygenated blood.
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185
Biology Easy

What is the name of the pigment in red blood cells that carries oxygen?

  • AMelanin
  • BChlorophyll
  • CHaemoglobin
  • DMyoglobin
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Correct Answer: Option C — Haemoglobin
Explanation: Haemoglobin is the iron-containing protein in red blood cells that binds to oxygen in the lungs and transports it to tissues throughout the body for cellular respiration.
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186
Biology Medium

What is the functional unit of the kidney responsible for filtration of blood?

  • AGlomerulus
  • BLoop of Henle
  • CBowman's capsule
  • DNephron
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Correct Answer: Option D — Nephron
Explanation: The nephron is the basic structural and functional unit of the kidney responsible for filtering blood regulating water and electrolyte balance and producing urine.
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187
Biology Medium

Which disease is caused by the deficiency of Vitamin B1 affecting the nervous and cardiovascular systems?

  • ABeriberi
  • BScurvy
  • CPellagra
  • DRickets
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Correct Answer: Option A — Beriberi
Explanation: Beriberi is caused by Vitamin B1 or thiamine deficiency and affects the nervous and cardiovascular systems causing muscle weakness nerve damage and heart problems.
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188
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
189
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.
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190
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.
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