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۔
کون سا عضو ہاضمہ انزائم بنانے میں مدد کرتا ہے؟
Stomach
Pancreas
Liver
None of these
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Explanation
The pancreas is the enzyme “ powerhouse ” of digestion .
It produces the most important digestive enzymes,
which are those that break down carbohydrates, proteins, and fats.
the pancreas creates natural juices called pancreatic enzymes to break down foods.
تاج محل سے سنگ مرمر کینسر کس کی وجہ سے ہوتا ہے؟
Acid rain
Air pollution
Water pollution
None of these
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Explanation
Acid rain , caused by air pollution (sulfur dioxide and nitrogen oxides), reacts with marble, leading to corrosion and discoloration of the Taj Mahal.
This process, known as " marble cancer ," weakens the structure and turns the white marble yellowish over time.
Blood Issues
Dirty Water
Dirty environment
Mosquito
All of these
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Explanation
Malaria is caused by Plasmodium parasites .
The parasites are spread to people through the bites of infected female Anopheles mosquitoes , called "malaria vectors.
کس نے دریافت کیا کہ ملیریا مچھر سے پھیلتا ہے؟
Edward Jenner
Alexander Fleming
Louis Pasteur
Ronald Ross
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Explanation
Ronald Ross was a medical doctor who received the Nobel Prize for Physiology or Medicine in 1902 for his work on the transmission of malaria.
He belonged to the British .
Science of waves
Science of Sound
Science of light
Science of Electromagnetics Waves System
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Explanation
Acoustics is a branch of physics that deals with the study o f sound and its behavior.
It encompasses the generation, propagation, and effects of mechanical waves , including sound, ultrasound, and infrasound.
Colorimeter
Spectrophotometer
Chromatograph
Hygrometer
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Explanation
A spectrophotometer measures the amount of light absorbed by a substance at different wavelengths.
It is widely used in plant studies to analyze how leaves absorb specific wavelengths of light, which is crucial for understanding photosynthesis.
Oxygen
Nitrogen
Carbon
None of these
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Explanation
Cyanobacteria are the only diazotrophs (nitrogen-fixing organisms)
That produces oxygen as a by-product of the photosynthetic process, and which must negotiate the inevitable presence of molecular oxygen with an essentially anaerobic enzyme.
Vole
Porcupine
Pikas
Cocktail Rabbit
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Explanation
Pikas are small, mountain-dwelling mammals found in cold regions.
Unlike many other animals in such environments, they do not hibernate
Instead, they collect and store food during the summer to survive the harsh winters.
Placoderm
Archeopteryx
Therapsids
All of these
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Explanation
Placoderms, Archeopteryx, and Therapsids are true fossils representing extinct organisms.
**Placoderms:** Ancient armored fish from the Devonian period, well-known for their fossilized remains.
**Archeopteryx:** A transitional fossil that shows characteristics of both dinosaurs and birds, marking a key step in avian evolution.
**Therapsids:** Synapsids from the Permian and Triassic periods, regarded as ancestors to mammals.
Release harmful gases in environment
Used oxygen in burning
Release of Carbon Dioxide
All of these
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Explanation
The burning of fossil fuels has several disadvantages:
A. Release of Harmful Gases: It emits pollutants like carbon monoxide, sulfur dioxide, nitrogen oxides, and particulate matter, contributing to air pollution and health issues.
B. Oxygen Consumption: Combustion requires oxygen, as fossil fuels react with it to produce energy and byproducts.
C. Carbon Dioxide Emission: It releases significant amounts of carbon dioxide, a major greenhouse gas driving climate change and global warming.
