All Free Everyday Science MCQs with Answers

1151. Who discovered the blood group of man?

• A. Edward Jenner
• B. Laren
• C. Karl Landsteiner
• D. William Harvey

Explanation: Karl Landsteiner discovered the ABO blood-group system in 1900. Edward Jenner is associated with the smallpox vaccine, while William Harvey described blood circulation.

1152. All of the following foods lack vitamin C, except

• A. Cheese
• B. Milk
• C. Rice
• D. None of these

Explanation: Milk contains a small amount of vitamin C, whereas ordinary cheese and polished rice provide little or none. Thus milk is the exception among the listed foods.

1153. Which chamber of human heart pumps fully oxygenated blood to aorta and hence to the body:

• A. Right Auricle
• B. Left Auricle
• C. Right Ventricle
• D. Left Ventricle

Explanation: The left ventricle receives oxygenated blood from the left atrium and forcefully pumps it through the aorta to the body. The right ventricle sends deoxygenated blood to the lungs.

1154. In bacteria mesosomes take the place of which one of the following?

• A. Ribosome
• B. Mitochondria
• C. Golgi bodies
• D. None of these

Explanation: Mesosomes were traditionally described as membrane infoldings in bacteria that perform some functions compared with mitochondria, such as supporting respiration. Modern biology generally regards them as artifacts of chemical fixation.

1155. A blood alcohol level above ________ will often result in death:

• A. 0.10
• B. 0.20
• C. 0.30
• D. 0.41Chemistry

Explanation: A blood alcohol concentration around 0.40 or higher can suppress breathing and is frequently fatal, so 0.41 is the closest listed level. Individual tolerance and medical circumstances can change the outcome.

1156. Chromosomes first become visible during which phases of mitosis:

• A. Prometaphase
• B. Telophase
• C. Prophase
• D. Metaphase

Explanation: Chromatin condenses into visibly distinct chromosomes during prophase, the first stage of mitosis. They become most clearly aligned and visible later at metaphase.

1157. Study of culture is called?

• A. Odology
• B. Anthropology
• C. Ornithology
• D. Psychology

Explanation: Anthropology studies human beings, including their cultures, societies and development. Ornithology concerns birds, while psychology focuses mainly on behaviour and mental processes.

1158. A disease always has a______?

• A. Cure
• B. Germs
• C. Cause
• D. Patient

Explanation: Every disease has a cause, such as an infection, genetic change, environmental exposure or abnormal body process. A disease does not always have a cure or identifiable germs.

1159. An Average Hummingbird's heart rate per minute is __________.

• A. 500 times
• B. 1000 times
• C. more than 1000 times
• D. more than 1200 times

Explanation: A hummingbird's heart can beat at about 1,200 times per minute during intense activity, far faster than the human heart. Its rate varies with rest, flight and exertion.

1160. Smallpox was eradicated in 1970s. What was the 'great pox' which remains active?

• A. Bubonic plague
• B. Syphilis
• C. Measles
• D. None

Explanation: Syphilis is historically called the great pox, while smallpox was called the small pox. Syphilis is caused by the bacterium Treponema pallidum.