Most Repeated GK MCQs from Past Papers MCQs with Answers & Explanations (Page 164)

Collagen is the main structural protein in animal hides, and leather is made from these hides so collagen is the major ingredient that gives leather strength and flexibility.

Equal duration of day and night describes an equinox, when Earth's tilt places the Sun over the equator so daytime and nighttime are about the same length.

Virus is correct because H5N1 is a subtype of the influenza A virus, known for causing avian influenza infections.

Porous fits because sedimentary rocks form from deposited particles that leave pore spaces between grains, making them permeable and porous.

2.54 cm is correct because one international inch is defined as exactly 2.54 centimeters.

Eye is correct because myopia (nearsightedness) is a refractive error of the eye that causes distant objects to appear blurry.

M14 is correct because the Hakla - D.I. Khan Motorway has been designated and is commonly referred to as the M14 motorway.

Entomology is the scientific field that studies insects, so entomology is the correct name for the study of insects.

Bamboo is a type of grass, so it belongs to the grass family rather than being classified as an herb or weed.

Sunlight is made of 7 colours because white light splits into seven visible component colours when dispersed by a prism.

The medulla oblongata controls breathing and heartbeat as part of the brainstem that regulates vital autonomic functions.

Hertz is the unit of frequency, defined as one cycle per second.

A kilowatt is a unit of power equal to 1,000 watts, so kilowatt measures power.

Cellulose is a carbohydrate, specifically a polysaccharide made of glucose units that forms plant cell walls.

A lactometer measures milk by determining its specific gravity to assess milk quality and detect dilution.

Lack of insulin causes diabetes because insulin is the hormone that lets cells take up glucose and keeps blood sugar levels normal.

Venus rotates very slowly, so a single rotation (a Venus day) is extremely long and is nearly comparable to an Earth year.

The bacterial cell membrane is lipid-rich because it is primarily a phospholipid bilayer that surrounds and controls the cell interior.

Oxygen is the most abundant element in the Earth's crust, largely because it forms oxides and silicate minerals that dominate crustal rocks.

Saturn has a prominent ring system made of ice and rock particles that encircle the planet and make its rings visible.