All Free Everyday Science MCQs with Answers

1081. An average human heart beats about time in a minute?

• A. 72 times
• B. 85 times
• C. 90 times
• D. 120 times

Explanation: A resting adult heart beats roughly 60 to 100 times per minute, with about 72 beats per minute used as the traditional average. Exercise, age and health can change the rate.

1082. the delicate lungs are protected by a cage that is called ______?

• A. luvcage
• B. Ribcage
• C. both A & B
• D. None of these

Explanation: The ribs and breastbone form the rib cage, which protects the delicate lungs and heart. “Luvcage” is simply a misspelling and is not an anatomical term.

1083. An adult have permanent teeth?

• A. 30
• B. 40
• C. 50
• D. 32Biological Sciences

Explanation: A complete adult dentition normally has 32 permanent teeth, including four wisdom teeth. If wisdom teeth are absent or removed, the functional total may be 28.

1084. A three year child has _______ teeth?

• A. 20
• B. 30
• C. 10
• D. None of these

Explanation: By about three years of age, children normally have all 20 primary, or milk, teeth. Permanent teeth begin replacing them later in childhood.

1085. The stomach is the shape like bag?

• A. J Shape
• B. E shape
• C. T shape
• D. None of these

Explanation: The stomach is a muscular, J-shaped sac between the oesophagus and small intestine. Its curved shape allows it to store and mix food.

1086. New Born Baby Brain weight is about________?

• A. 300 grams
• B. 400 grams
• C. 250 grams
• D. None of these

Explanation: A newborn baby's brain weighs roughly 300 to 400 grams, so about 400 grams is the closest listed value. The adult brain is much heavier, at approximately 1.3 to 1.4 kilograms.

1087. Leprosy is the oldest disease in the world caused by which microorganism?

• A. Virus
• B. Fungi
• C. Bacteria
• D. None

Explanation: Leprosy is caused by the bacterium Mycobacterium leprae, which primarily affects the skin and peripheral nerves. It is therefore bacterial, not viral or fungal.

1088. Which of the following vitamin is known as folate?

• A. B-9
• B. B-1
• C. B-6
• D. vitamin-D

Explanation: Folate is vitamin B9, a water-soluble vitamin needed for DNA synthesis and normal red-blood-cell formation. Its deficiency is especially important during pregnancy because it can cause neural-tube defects.

1089. The _______ test is a color perception test for red-green color deficiencies.

• A. Hemiplegia
• B. Ishihara
• C. Lalopathy
• D. None of the above

Explanation: The Ishihara test uses coloured-dot plates to detect red-green colour-vision deficiencies. The other options are not standard colour-perception tests.

1090. What cells are involved in bone remodeling?

• A. Osteoblasts
• B. Osteoclasts
• C. Osteocytes
• D. All of these

Explanation: Bone remodeling requires osteoclasts to remove old bone, osteoblasts to form new bone, and osteocytes to sense and regulate bone maintenance. Therefore, all three cell types participate.