PPSC PAST PAPERS ALL MCQS 2025 OF EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
ڈی این اے سے آر این اے انو کے ترکیبوں کو _______ کہا جاتا ہے؟
- Transition
- Andora
- Transcription
- None of these
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Explanation
Transcription is the process where an RNA molecule is synthesized using DNA as a template.This is the first step in gene expression before translation into proteins.
رفتار کی ایس آئی یونٹ کیا ہے؟
- m²-sec
- m/s
- m·s⁻¹
- Both B and C
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Explanation
Velocity SI units: meters per second (m/s or m·s⁻¹).
This unit is derived from the SI units for displacement (meter) and time (second),
Velocity is defined as the rate of change of displacement over time (displacement/time).
مچھلیوں میں بنیادی خارج ہونے والا عضو _____ ہے؟
- Skin
- Gills
- Kidney
- All of these
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Explanation
The kidney is the primary excretory organ in fishes, responsible for osmoregulation and excretion of nitrogenous wastes.
However, gills and skin also play minor roles in excretion.
ریڑھ کی ہڈی میں کتنے جوڑے ریڑھ کی ہڈی میں ہیں؟
- 31 pairs
- 24 pairs
- 36 pairs
- None of these
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Explanation
There are 31 pairs of spinal nerves (62 nerves) that originate from the spinal cord.These include 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal nerve pairs.
چٹان اور معدنیات کی بڑی مقدار میں کون سا عنصر موجود ہے؟
- Carbon
- Silicon
- Hydrogen
- Mineral
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Explanation
Silicon is the second most abundant element in the Earth's crust,
Making up a large portion of most rocks and minerals, particularly silicates, which are composed of silicon and oxygen.
Earth's Crust Elements
1 Oxygen (O) 46.1%
2 Silicon (Si) 28.2%
3 Aluminum (Al) 8.2%
4 Iron (Fe) 5.6%
خلیے میں پروٹین کی ترکیب کس عضیے میں ہوتی ہے؟
- Mitochondria
- Ribosome
- Golgi apparatus
- None of these
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Explanation
Ribosomes are the site of protein synthesis.They join amino acids to form proteins.Ribosomes can be free or attached to the rough ER.They are found free in the cytoplasm or attached to the rough endoplasmic reticulum (RER).
تمام تیزابوں میں عام عنصر _____ ہے؟
- Sulphur
- Oxygen
- Hydrogen
- None of these
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Explanation
All acids contain hydrogen (H⁺) ions, which are responsible for their acidic properties.When dissolved in water, acids release H⁺ ions, making the solution acidic.
مادے کی چوتھی حالت ___ ہے؟
- Plasma
- Steam
- Gas
- Matteroid
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Explanation
Plasma is the fourth state of matter, following:
- Solids
- Liquids
- Gases
It consists of ionized gases with equal numbers of positively and negatively charged particles.
ایک سیارے کے گرد گھومنے والا آسمانی جسم کیا کہلاتا ہے
- Cornets
- Meteors
- Moon
- Asteroids
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Explanation
A celestial body that revolves around a planet is known as a satellite
Which can be natural (like the Moon) or artificial (like the International Space Station).
A celestial body that revolves around a planet is known as a moon.
Moons are natural satellites orbiting planets and can vary in size and composition.
ممکنہ توانائی اور حرکی توانائی توانائی کی کس قسم کی اقسام ہیں؟
- Chemical energy
- Thermal energy
- Mechanical energy
- Nuclear energy
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Explanation
Potential energy and kinetic energy are types of mechanical energy.
Mechanical energy encompasses both potential energy (stored energy due to position) and kinetic energy (energy of motion).
