PPSC Everyday Science Past Paper 2020 Solved MCQs with Answers
Solved Everyday Science MCQs from the PPSC 2020 past paper, each with the correct answer and a clear explanation. Ideal practice for PPSC, FPSC, NTS, CSS and PMS. All questions are extracted from the actual 2020 paper and verified before publication.
Hormones produced by ovaries:
The ovaries produce oestrogen and progesterone.
Largest gland in the human body:
The liver is the largest gland in the body, and also its largest internal organ.
Functional unit of kidney:
The nephron is the functional unit of the kidney, filtering the blood and forming urine.
First organ to be transplanted (1954):
The kidney was the first organ successfully transplanted, in Boston in 1954, between identical twins.
Bile is produced by ___ and stored in ___:
Bile is made by the liver and stored in the gall bladder until food reaches the intestine.
Most digestion & absorption happens in:
Most digestion and nearly all absorption take place in the small intestine, whose lining is folded into villi to enlarge the surface.
Heart is covered by a membrane called:
The heart is enclosed in the pericardium. The pleura covers the lungs.
Graveyard of RBCs:
The spleen is called the graveyard of red blood cells, since it breaks down the worn out ones.
Retina of the eye acts like:
The retina acts as the film of a camera, receiving the image formed by the lens.
Powerhouse of the cell:
Mitochondria are the powerhouse of the cell, releasing energy as ATP.
Brain of the cell:
The nucleus is the brain of the cell, holding the DNA that directs its activity.
In metabolism, enzymes act as:
Enzymes are biological catalysts, speeding a reaction without being consumed by it.
Fertilization in humans occurs in:
Fertilisation normally occurs in the fallopian tube, not the uterus.
Allergy is caused due to:
An allergy is an antigen-antibody reaction, the immune system overreacting to a harmless substance.
Hookworm enters the body through:
Hookworm larvae bore through the skin of the soles, which is why the infection is common where people walk barefoot.
Number of permanent teeth in adult:
An adult has 32 permanent teeth. A child has 20 milk teeth.
Normal human body temperature:
Normal body temperature is 98.6 degrees Fahrenheit, that is 37 degrees Celsius.
Normal blood pressure (mmHg):
Normal blood pressure is about 120 over 80 mmHg.
Normal pH range of human blood:
Blood is slightly alkaline, with a pH of 7.35 to 7.45.
Approximate iodine in adult body:
The adult body holds about 15 to 20 mg of iodine, most of it in the thyroid.
Skin makes up ___ of body weight:
Skin makes up about 16 per cent of body weight, and is the largest organ of the body.
Which is NOT a cranial bone?
The mandible, the lower jaw, is a facial bone and the only movable bone of the skull. Frontal, parietal and occipital are cranial bones.
Glucose is the primary energy source for:
Glucose is the primary fuel of every cell in the body, and the only one the brain normally uses.
Telephone was invented by:
Alexander Graham Bell patented the telephone in 1876.
Light bulb was invented by:
Thomas Edison produced the first commercially practical light bulb in 1879.
Television was invented by:
John Logie Baird demonstrated the first working television in 1926.
Airplane was invented by:
The Wright brothers made the first powered flight in 1903.
Steam engine (with condenser) was improved by:
James Watt added the separate condenser in 1765, which made the steam engine efficient enough to drive the industrial revolution.
Periodic table was developed by:
Dmitri Mendeleev published the periodic table in 1869, and left gaps for elements not yet found.
Dynamite was invented by:
Alfred Nobel invented dynamite in 1867, and left his fortune to fund the Nobel Prizes.
Diesel engine was invented by:
Rudolf Diesel invented the compression ignition engine that bears his name.
Battery (electric) was invented by:
Alessandro Volta built the first electric battery, the voltaic pile, in 1800.
Dynamo was invented by:
Michael Faraday built the first dynamo, after discovering electromagnetic induction in 1831.
AC motor was invented by:
Nikola Tesla invented the alternating current induction motor.
Cinema (motion film) was invented by:
Motion pictures grew from the work of Edison in America and the Lumiere brothers in France.
Cell phone was invented by:
Martin Cooper of Motorola made the first handheld mobile phone call in 1973.
Computer mouse was invented by:
Douglas Engelbart invented the computer mouse in 1964.
Printing press (movable) was invented by:
Johannes Gutenberg introduced movable type printing in Europe about 1440.
Microscope (compound) was invented by:
Zacharias Janssen is credited with the compound microscope, about 1590.
Telescope was first invented by:
Hans Lippershey filed the first telescope patent in 1608. Galileo built his own the next year and turned it on the sky.
Thermometer was invented by:
Galileo built the first thermoscope, the forerunner of the thermometer, about 1593.
Mercury thermometer was invented by:
Daniel Fahrenheit made the first mercury thermometer in 1714.
Centigrade thermometer was invented by:
Anders Celsius devised the centigrade scale in 1742.
Barometer was invented by:
Evangelista Torricelli invented the barometer in 1643.
Pneumatic tyres invented by:
John Boyd Dunlop developed the practical pneumatic tyre in 1888.
Vulcanised rubber was developed by:
Charles Goodyear discovered vulcanisation in 1839, which made rubber usable in heat and cold alike.
Jet engine was invented by:
Frank Whittle patented the jet engine in 1930.
About the PPSC Everyday Science Past Paper 2020
Every MCQ above is taken from the Punjab Public Service Commission (PPSC) Everyday Science papers held in 2020, with the correct answer and a written explanation for each. Past-paper practice is the most dependable way to prepare for PPSC, FPSC, NTS, CSS and PMS, because these papers repeat their themes, and often the questions themselves, from one year to the next.
Questions were checked against reliable sources before publication. Where a circulating source sheet carried a factual or wording error, we corrected it rather than reproducing the mistake. For chapter-wise preparation, work through our Everyday Science MCQs hub, which also lists every other year’s paper. Further reading: Pakistan Movement and the PPSC official website.
How to Use This Paper
Attempt the full quiz before looking at any answer, then read the explanation for every question you got wrong, including those you guessed correctly. A past paper is only useful if you close the gaps it exposes. Pro members can download the complete paper as a PDF with all answers and explanations for offline revision.