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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

273 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.
PPSC preparation illustration
151

Which muscle separates the chest cavity from the abdominal cavity and assists in breathing?

  • ADiaphragm
  • BIntercostal muscles
  • CTrapezius
  • DBicep
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Correct Answer: Option A β€” Diaphragm
Explanation: The diaphragm is a dome shaped muscle that separates the chest cavity from the abdominal cavity and contracts and relaxes to facilitate inhalation and exhalation.
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152

Which flap of tissue prevents food from entering the trachea during swallowing?

  • ALarynx
  • BEpiglottis
  • CPharynx
  • DEsophagus
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Correct Answer: Option B β€” Epiglottis
Explanation: The epiglottis is a flap of tissue that folds over the trachea during swallowing preventing food and liquids from entering the airway and causing choking.
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153

Which structure in the throat is commonly known as the voice box and is responsible for sound production?

  • APharynx
  • BLarynx
  • CTrachea
  • DEpiglottis
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Correct Answer: Option B β€” Larynx
Explanation: The larynx commonly known as the voice box contains vocal cords that vibrate to produce sound and also helps protect the airway during swallowing.
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154

Which structure connects the throat to the lungs and branches into smaller airways within the chest?

  • AEsophagus
  • BTrachea
  • CLarynx
  • DPharynx
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Correct Answer: Option B β€” Trachea
Explanation: The trachea commonly known as the windpipe connects the throat to the lungs branching into smaller airways called bronchi that direct air into each lung.
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155

Which part of the human respiratory system is primarily responsible for warming and filtering incoming air?

  • ATrachea
  • BNasal cavity
  • CBronchi
  • DAlveoli
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Correct Answer: Option B β€” Nasal cavity
Explanation: The nasal cavity warms moistens and filters incoming air removing dust and pathogens before it travels further into the respiratory system for gas exchange.
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156

Which organ in the human body acts as a reservoir for blood and helps filter out old or damaged red blood cells?

  • ALiver
  • BSpleen
  • CPancreas
  • DKidney
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Correct Answer: Option B β€” Spleen
Explanation: The spleen acts as a reservoir for blood and filters out old or damaged red blood cells while also playing a role in immune system function within the body.
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157

Which organ produces insulin to regulate blood sugar levels in the body?

  • ALiver
  • BPancreas
  • CKidney
  • DSpleen
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Correct Answer: Option B β€” Pancreas
Explanation: The pancreas produces insulin a hormone that regulates blood sugar levels by allowing cells to absorb glucose from the bloodstream for energy or storage.
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158

Which organ stores bile produced by the liver until it is needed for digestion?

  • APancreas
  • BGallbladder
  • CStomach
  • DSpleen
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Correct Answer: Option B β€” Gallbladder
Explanation: The gallbladder stores and concentrates bile produced by the liver releasing it into the small intestine when needed to help digest fatty foods consumed during meals.
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159

Which organ produces bile that aids in the digestion of fats?

  • APancreas
  • BLiver
  • CGallbladder
  • DStomach
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Correct Answer: Option B β€” Liver
Explanation: The liver produces bile which is stored in the gallbladder and released into the small intestine to emulsify fats making them easier to digest and absorb.
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160

Which acid in the stomach helps in the digestion of food and kills harmful bacteria?

  • ASulfuric acid
  • BHydrochloric acid
  • CAcetic acid
  • DCitric acid
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Correct Answer: Option B β€” Hydrochloric acid
Explanation: Hydrochloric acid secreted by stomach glands helps digest food by activating pepsin and also kills many harmful bacteria that may be present in ingested food.
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