All Free Everyday Science MCQs with Answers

1311. The only living cells in the body without blood supply is___________?

• A. Pupil
• B. Nail
• C. Cornea
• D. Hair

Explanation: The cornea is living tissue but has no blood vessels, so it receives oxygen mainly from tears and the surrounding air. Hair and nails are largely dead keratin structures rather than living cells.

1312. A common skin condition that causes skin redness and irritation is known as_________?

• A. Psoriasis
• B. Hypermetropia
• C. Leukoderma
• D. Diphtheria

Explanation: Psoriasis commonly produces red, inflamed and irritated patches of skin, often covered with silvery scales. Hypermetropia is a vision defect, while leukoderma involves loss of skin pigment.

1313. A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?

• A. Glaucoma
• B. Hemophilia
• C. Cataract
• D. Diphtheria

Explanation: A cataract is clouding of the eye's lens, preventing light from passing clearly to the retina. Glaucoma is mainly associated with optic-nerve damage, often linked to raised eye pressure.

1314. The blind spot is located at the ___________ of the eye ?

• A. pupil
• B. vitreous humor
• C. aqueous humor
• D. optic disc

Explanation: The blind spot is at the optic disc, where the optic nerve leaves the eye and no light-sensitive photoreceptors are present. The pupil and eye fluids do not form the blind spot.

1315. The hormone that increases the rate of heart beat and blood pressure after shock in a person is___________?

• A. Adrenalin
• B. Gastrin
• C. Thyroxin
• D. Pancreatic

Explanation: Adrenalin, also called epinephrine, prepares the body for emergency action by increasing heart rate and blood pressure. Gastrin acts mainly on the stomach, while thyroxine regulates metabolic rate more broadly.

1316. Being Myopic means you have problem in seeing ______________?

• A. Distant objects clearly
• B. Close objects clearly
• C. Both A and B
• D. Distant and close objects look unclear

Explanation: Myopia, or short-sightedness, occurs when the eye focuses distant images in front of the retina, so nearby objects are clearer while distant objects look blurred.

1317. Which process includes all of the other processes listed?

• A. Absorption
• B. Assimilation
• C. Secretion
• D. Metabolism

Explanation: Metabolism is the complete set of chemical reactions in the body and includes the processes that build, break down, absorb, and use substances. Absorption, assimilation, and secretion are narrower physiological processes.

1318. Which animal has no vocal chords ?

• A. Lion
• B. Zebra
• C. Dolphin
• D. Giraffes

Explanation: Giraffes are commonly described as having no vocal cords and communicate using low-frequency sounds, including sounds below the range of human hearing. The other listed animals produce ordinary vocal sounds.

1319. Stripes on each side of "Grévy's Zebra" is about_________?

• A. 20+
• B. 30+
• C. 80+
• D. 36+Standardized & Admissions Tests

Explanation: Grevy's zebra has a particularly large number of narrow stripes, commonly stated as more than 80 on each side. This distinguishes it from the less finely striped plains zebra.

1320. Age of the lion is determined through?

• A. Nose Colour
• B. Length of the tail
• C. Length of Nails
• D. Hair Colour

Explanation: A lion's age can be estimated from changes in its nose colour: the nose develops darker spots as the lion grows older. Tail length, nail length, and hair colour are not reliable standard indicators.