All Free Everyday Science MCQs with Answers

1201. Diabetes could be classified into______ types.

• A. Two types
• B. Three types
• C. Four types
• D. None of these

Explanation: Basic medical classification commonly identifies type 1 diabetes, type 2 diabetes, and gestational diabetes. Other specific forms exist, but these are the three major categories expected in elementary MCQs.

1202. Which of the following is caused by bacteria?

• A. Malaria
• B. Tetanus
• C. Cancer
• D. None of these

Explanation: Tetanus is caused by the bacterium Clostridium tetani, whose toxin affects the nervous system. Malaria is caused by a Plasmodium parasite transmitted by mosquitoes, not by bacteria.

1203. Which component of diet helps in preventing constipation ?

• A. Proteins
• B. Fats
• C. Fiber
• D. Carbohydrates

Explanation: Dietary fiber adds bulk and retains water in the stool, helping it pass through the intestine more easily. Low fiber intake is therefore a common contributor to constipation.

1204. The size of Covid-19 virus is______?

• A. 25-30KB
• B. 28-30KB
• C. 29-30KB
• D. None of these

Explanation: The SARS-CoV-2 genome is about 30 kilobases long, approximately 29.9 kb. Kilobases describe the length of its genetic material, not the physical diameter of the virus particle.

1205. Which Part of Human Eye can be donated?

• A. Conjunctiva
• B. Iris
• C. Pupil
• D. Cornea

Explanation: The cornea is the transparent front covering of the eye and can be donated for corneal transplantation. The iris, pupil and conjunctiva are not the standard transplantable eye tissue referred to here.

1206. How many milky teeth or primary teeth does a human have?

• A. 33
• B. 20
• C. 15
• D. 32

Explanation: Children normally have 20 primary teeth, also called milk or deciduous teeth. They are later replaced by the permanent dentition, which normally contains 32 teeth.

1207. ___________ is a mammal who fly?

• A. Ostrich
• B. Bat
• C. Peacock
• D. None of these

Explanation: A bat is a mammal because it has hair and nurses its young with milk, although it can fly. Ostrich and peacock are birds, not mammals.

1208. Vitamin C is essential for___________?

• A. Appetite
• B. Growth & repairing of tissues
• C. Muscles
• D. Brain

Explanation: Vitamin C is needed for collagen formation, which supports the growth and repair of skin, blood vessels and other tissues. Severe deficiency causes scurvy and poor wound healing.

1209. Human eye is how many Megapixels?

• A. 1080 MP
• B. 720 MP
• C. 576 MP
• D. 570 MP

Explanation: The human eye is often estimated to have a resolving capacity of about 576 megapixels, although comparing an eye directly with a camera sensor is only an approximation. This estimate refers to visual detail across the field of view, not a literal digital image.

1210. Medium sized kidney stones are removed by__________?

• A. Dialysis
• B. Lithotripsy
• C. Excretion
• D. Laser

Explanation: Lithotripsy uses focused shock waves to break a medium-sized kidney stone into smaller pieces that can pass through the urinary tract. Dialysis treats kidney failure, not stones.