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PPSC MCQs

Punjab Public Service Commission — 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.

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

271

Everyday Science Easy

Which blood component is primarily responsible for clotting?

ARed blood cells
BWhite blood cells
CPlatelets
DPlasma

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Correct Answer: Option C — Platelets

Explanation: Platelets are small cell fragments in the blood that clump together at injury sites to form clots preventing excessive bleeding and initiating the wound healing process.

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272

Everyday Science Easy

Which part of the human eye controls the amount of light entering it?

ARetina
BCornea
CIris
DLens

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Correct Answer: Option C — Iris

Explanation: The iris is the colored muscular structure that controls pupil size thereby regulating the amount of light entering the eye to ensure clear vision under varying light conditions.

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273

Everyday Science Easy

Which gas is most abundant in the Earth's atmosphere?

AOxygen
BNitrogen
CCarbon dioxide
DArgon

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Correct Answer: Option B — Nitrogen

Explanation: Nitrogen makes up about 78 percent of the Earth's atmosphere by volume making it the most abundant atmospheric gas far exceeding oxygen which constitutes roughly 21 percent.

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