All Free Everyday Science MCQs with Answers

1341. The average human body contains how many pints of blood?

• A. 3 to 5 pints
• B. 5 to 7 pints
• C. 7 to 8 pints
• D. 9 to 12 pints

Explanation: An average adult has roughly 4.5 to 6 litres of blood, which is about 9 to 12 US pints. The exact amount varies with body size, so option d gives the suitable range.

1342. What is the medical term for low blood sugar?

• A. Hypoglycemia
• B. Lymphoblastic leukemia
• C. Pulmonary edema
• D. Diabetes mellitus

Explanation: Hypoglycemia means an abnormally low level of glucose in the blood, with symptoms such as sweating, shakiness and confusion. Diabetes mellitus usually refers to persistently high blood glucose rather than low blood sugar.

1343. The protein content in wheat is approximately?

• A. 8%
• B. 6%
• C. 13%
• D. 17%

Explanation: Wheat grain commonly contains about 10 to 15 percent protein, with approximately 13 percent used as a standard estimate. The exact value changes among wheat varieties and growing conditions.

1344. Tooth decay is caused by?

• A. Salt
• B. Sugar
• C. Calcium
• D. Formalin

Explanation: Sugar feeds oral bacteria, which produce acids that dissolve tooth enamel and begin decay. Sugar is therefore the relevant option, although bacteria and their acids are the direct agents of damage.

1345. Who is considered the "father of psychoanalysis?

• A. Sigmund Frend
• B. Galileo
• C. Aristotle
• D. Fabrica

Explanation: Sigmund Freud is called the father of psychoanalysis, a method focused on unconscious motives and mental processes. Galileo and Aristotle were major thinkers but are not founders of psychoanalysis.

1346. 'Satiety' is the condition in which patient lacks?

• A. Talk
• B. Eat
• C. Sleep
• D. Walk

Explanation: Satiety is the feeling of fullness after eating, so a satiated person lacks the desire or appetite to eat more. It is the opposite of hunger.

1347. Scientific Name of Human is____________?

• A. Homo sapiens
• B. Mono sapiens
• C. Bio sapiens
• D. Cosmopolitan

Explanation: The scientific name of modern humans is Homo sapiens, meaning wise human. Homo is the genus and sapiens is the species name.

1348. The brain of human adult weighs about_________?

• A. 1200 - 1300 gm
• B. 1600 - 2000 gm
• C. 500 - 800 gm
• D. 100 - 200 gm

Explanation: An adult human brain weighs about 1.2 to 1.4 kilograms, although the exact value varies with sex and body size. Therefore, 1200-1300 grams is the closest listed range.

1349. What happens to a person who receives the wrong type of blood?

• A. All the arteries constrict
• B. All the arteries dialates
• C. The RBCs agglutinate
• D. The spleen and lymphnodes deteriorate

Explanation: Antibodies in incompatible blood react with antigens on the transfused red blood cells, causing the cells to clump, or agglutinate, and possibly rupture. This can block small blood vessels and cause a dangerous transfusion reaction.

1350. EEG records the activity of__________?

• A. Heart
• B. Lungs
• C. Brain
• D. Muscles

Explanation: An electroencephalogram, or EEG, detects the brain's electrical activity through electrodes placed on the scalp. Heart activity is recorded by an ECG, not an EEG.