All Free Everyday Science MCQs with Answers

1211. Accumulation of salts in kidneys results in_________?

• A. Diabetes
• B. Hypertension
• C. Cancer
• D. Kidney Stone

Explanation: When mineral salts crystallise and accumulate in the kidneys, they can form kidney stones. Diabetes and hypertension are different disorders and are not the direct result named here.

1212. The apart of neuron which receives message are__________?

• A. Cell Bodies
• B. Axons
• C. Nuclei
• D. Dendrites

Explanation: Dendrites are branched extensions that receive signals from other neurons or receptors and carry them toward the cell body. Axons usually transmit signals away from the cell body.

1213. Sensory neurons carry message towards ?

• A. Muscle
• B. Muscles and Glands
• C. Sense and Organs
• D. Brain and Spinal Cord Science

Explanation: Sensory neurons carry impulses from sense receptors toward the central nervous system, consisting of the brain and spinal cord. Motor neurons carry commands in the opposite direction to muscles or glands.

1214. What is the percentage of water present in our brain?

• A. 85%
• B. 95%
• C. 97%
• D. 73%Preparing For College Admissions Tests

Explanation: The brain is composed of roughly 73% water, although the exact percentage varies with the source and how it is measured. The much higher values of 85% to 97% are common overestimates.

1215. Inflammation of liver is caused by____________?

• A. Cholera
• B. Hepatitis
• C. Typhoid
• D. Jaundice

Explanation: Hepatitis means inflammation of the liver and is commonly caused by hepatitis viruses, though other causes also exist. Jaundice is a symptom that may result from liver disease, not the name of the inflammation itself.

1216. Milk contains water

• A. 70%
• B. 75%
• C. 87%
• D. 90%Exploring Educational Science Kits

Explanation: Milk is approximately 87% water, with the remainder consisting mainly of fats, proteins, lactose, minerals, and vitamins. The other percentages are too low for ordinary cow's milk.

1217. Which of the following disease affects the skin ?

• A. Rickets
• B. Osteoporosis
• C. Anemia
• D. Pellagra

Explanation: Pellagra, caused mainly by niacin deficiency, characteristically produces dermatitis, along with diarrhoea and mental changes. Rickets and osteoporosis affect bones, while anemia affects the blood.

1218. BCG vaccine is used to produce immunity against___________?

• A. Whooping cough
• B. Tuberculosis
• C. Virus fever
• D. Smallpox

Explanation: BCG, or Bacillus Calmette-Guérin, is a vaccine used primarily to protect against tuberculosis, especially severe childhood forms. It is not the vaccine for whooping cough or smallpox.

1219. How many teeth does a dog have?

• A. 42
• B. 45
• C. 46
• D. 47

Explanation: A typical adult dog has 42 permanent teeth: 12 incisors, 4 canines, 16 premolars, and 10 molars. Puppies have fewer temporary teeth, so the answer refers to an adult dog.

1220. Deficiency of vitamin C will cause:__________?

• A. Beri-Beri
• B. Architis
• C. Scurvy
• D. Night-blindness

Explanation: Vitamin C is needed for collagen formation and healthy connective tissue; its deficiency causes scurvy. Beri-beri results from vitamin B1 deficiency, while night-blindness is linked to vitamin A deficiency.