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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

1,259 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
741
Everyday Science Easy

Which gas makes up the highest percentage of exhaled human breath besides nitrogen?

  • AOxygen
  • BCarbon dioxide
  • CHydrogen
  • DHelium
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Correct Answer: Option B — Carbon dioxide
Explanation: Exhaled human breath contains a higher concentration of carbon dioxide than inhaled air because cellular respiration produces carbon dioxide as a metabolic waste product that the lungs expel.
Submitted by: PaperMCQs
742
Computer Science Medium

What is the default port number for HTTPS?

  • A21
  • B25
  • C80
  • D443
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Correct Answer: Option D — 443
Explanation: HTTPS (HyperText Transfer Protocol Secure) uses port 443 by default to provide secure communication over the Internet. It encrypts data using SSL/TLS protocols, protecting sensitive information such as passwords, banking details, and personal data from attackers
Submitted by: PaperMCQs
743
Everyday Science Medium

Which type of immunity is passed from mother to infant through breast milk or placental transfer?

  • AActive immunity
  • BPassive immunity
  • CInnate immunity
  • DAcquired immunity through vaccination
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Correct Answer: Option B — Passive immunity
Explanation: Passive immunity is passed from mother to infant through breast milk or placental transfer providing temporary protection against infections during the early stages of an infant's life.
Submitted by: PaperMCQs
744
Everyday Science Medium

Which type of immunity is gained through vaccination by introducing a weakened or inactivated pathogen?

  • ANatural immunity
  • BAcquired active immunity
  • CPassive immunity
  • DInnate immunity
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Correct Answer: Option B — Acquired active immunity
Explanation: Acquired active immunity is gained through vaccination by introducing a weakened or inactivated pathogen which stimulates the immune system to produce specific antibodies for future protection.
Submitted by: PaperMCQs
745
Everyday Science Medium

Which common food item is fortified with iodine in many countries to prevent deficiency related disorders?

  • ATable salt
  • BSugar
  • CCooking oil
  • DFlour
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Correct Answer: Option A — Table salt
Explanation: Table salt is commonly fortified with iodine in many countries as a public health measure to prevent iodine deficiency disorders such as goiter and developmental issues in children.
Submitted by: PaperMCQs
746
Everyday Science Medium

Which mineral deficiency is commonly associated with goiter due to impaired thyroid hormone production?

  • AIron deficiency
  • BIodine deficiency
  • CCalcium deficiency
  • DZinc deficiency
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Correct Answer: Option B — Iodine deficiency
Explanation: Iodine deficiency impairs thyroid hormone production leading to goiter an enlargement of the thyroid gland as the body attempts to compensate for insufficient hormone synthesis.
Submitted by: PaperMCQs
747
Everyday Science Easy

Which essential mineral is critical for oxygen transport in the blood as a key component of hemoglobin?

  • ACalcium
  • BIron
  • CZinc
  • DMagnesium
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Correct Answer: Option B — Iron
Explanation: Iron is a critical component of hemoglobin the protein in red blood cells responsible for transporting oxygen throughout the body and its deficiency commonly causes anemia.
Submitted by: PaperMCQs
748
Everyday Science Easy

Which essential mineral is critical for maintaining strong bones and teeth in the human body?

  • AIron
  • BCalcium
  • CPotassium
  • DZinc
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Correct Answer: Option B — Calcium
Explanation: Calcium is an essential mineral critical for maintaining strong bones and teeth as well as supporting muscle function nerve transmission and proper blood clotting in the body.
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749
Everyday Science Easy

Which common preventive health practice helps reduce the transmission of airborne respiratory infections?

  • AWearing masks
  • BEating more fruit
  • CDrinking more water
  • DSleeping longer
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Correct Answer: Option A — Wearing masks
Explanation: Wearing masks helps reduce the transmission of airborne respiratory infections by blocking respiratory droplets that carry viruses or bacteria from spreading between individuals.
Submitted by: PaperMCQs
750
Everyday Science Medium

Which common food borne bacterial disease causes prolonged fever and is transmitted through contaminated food and water?

  • ACholera
  • BTyphoid
  • CMalaria
  • DDengue
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Correct Answer: Option B — Typhoid
Explanation: Typhoid fever is a bacterial disease caused by Salmonella typhi transmitted through contaminated food and water leading to prolonged fever abdominal pain and other systemic symptoms.
Submitted by: PaperMCQs
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