All Free Everyday Science MCQs with Answers

1351. The toxicity of which of the following heavy metals leads to Liver cirrhosis?

• A. Copper
• B. Lead
• C. Mercury
• D. Zinc

Explanation: Excess copper accumulates in the liver in Wilson disease and can cause liver damage and cirrhosis. Lead and mercury are also toxic, but copper is the intended metal associated with this condition.

1352. Insufficient blood supply in human body is referred as___________?

• A. Ischemia
• B. Hyperemia
• C. Hemostasia
• D. Hemorrhage

Explanation: Ischemia means inadequate blood supply to a tissue, usually because of narrowed or blocked blood vessels. Hemorrhage is blood loss, whereas hyperemia means increased blood flow.

1353. Cell or Tissue death within a living body is called as__________?

• A. Neutrophilia
• B. Nephrosis
• C. Necrosis
• D. Neoplasia

Explanation: Necrosis is the death of cells or tissue within a living body, usually because of injury, infection, or loss of blood supply. Neoplasia means abnormal new tissue growth, not tissue death.

1354. The carbon dioxide content in the air that we exhale is about?

• A. 4%
• B. 9%
• C. 15%
• D. 16%Chemistry

Explanation: Exhaled air contains about 4% carbon dioxide because body cells produce CO2 during respiration and the blood carries it to the lungs. Inhaled air contains only about 0.04% CO2, so exhalation greatly increases its proportion.

1355. Tetanus is caused by____________?

• A. Clostridium
• B. Virus
• C. Bacteriophage
• D. Salmonella

Explanation: Tetanus is caused by the bacterium Clostridium tetani, whose spores can enter wounds and whose toxin causes severe muscle spasms. It is not caused by a virus or by Salmonella.

1356. A reptile with a four-chambered heart is______________?

• A. Snake
• B. Turtle
• C. Lizard
• D. Crocodile

Explanation: Crocodiles are the only living reptiles with a fully four-chambered heart, separating oxygenated and deoxygenated blood. Snakes, turtles and lizards generally have a three-chambered heart.

1357. Which creature is the symbol of Medicine?

• A. Cat
• B. Lizard
• C. Snake
• D. None of these

Explanation: The snake is associated with medicine through the Rod of Asclepius, a traditional medical symbol featuring one snake around a staff. The caduceus has two snakes and is often mistakenly used as a medical symbol.

1358. Ombrophobia is fear of____________?

• A. Rain
• B. Snow
• C. Smog
• D. None of these

Explanation: Ombrophobia combines ombro, meaning rain, with phobia, meaning an intense fear. It therefore refers to fear of rain, not snow or smog.

1359. The post-mortem examination of a body is called __________?

• A. Etymology
• B. autopsy
• C. Anatomy
• D. None of these

Explanation: An autopsy is the examination of a body after death to determine the cause and manner of death. Anatomy is the general study of body structure, while etymology studies word origins.

1360. Chemically finger nails are made up of ____________?

• A. Carbohydrate
• B. Fats
• C. protein
• D. Starch

Explanation: Fingernails are made mainly of keratin, a tough structural protein also found in hair and the outer layer of skin. They are not made of carbohydrate, fat or starch.