All Free Everyday Science MCQs with Answers

1131. A healthy man consumes maximum calories while playing?

• A. Cricket
• B. Golf
• C. Billiards
• D. Football

Explanation: Football generally involves continuous running, sprinting, and movement, so it uses more energy than the mostly stationary activities listed. Actual calorie expenditure still varies with playing time and intensity.

1132. Which of following contains cobalt?

• A. Vitamin K
• B. Chlorophyll
• C. Vitamin B12
• D. Haemoglobin

Explanation: Vitamin B12 contains cobalt at the centre of its corrin ring, which is why it is also called cobalamin. Chlorophyll contains magnesium, while haemoglobin contains iron.

1133. The most abundant element in human body is __________?

• A. Hydrogen
• B. Blood
• C. Oxygen
• D. Protein

Explanation: Oxygen is the most abundant element in the human body by mass, largely because water and many organic compounds contain oxygen. Blood and protein are substances, not chemical elements.

1134. "Plague" is a disease, spread by?

• A. Cow
• B. Cat
• C. Rat
• D. Dog

Explanation: Plague is caused by the bacterium Yersinia pestis and is classically transmitted to humans by fleas carried by infected rats. The rat is therefore the expected source in this question, although fleas are the immediate vectors.

1135. A colour blind person cannot distinguish between _________?

• A. White & Yellow
• B. Red & Green
• C. Red & Black
• D. Green & Black

Explanation: The common form of red-green colour blindness makes red and green hues difficult to distinguish because the relevant cone pigments are absent or abnormal. Other colour-vision defects exist, but red-green deficiency is the standard answer.

1136. Study of joints called:

• A. Esthesiology
• B. Splanchnology
• C. Arthrology
• D. Anthropology

Explanation: Arthrology is the branch of anatomy concerned with joints and their articulations. Splanchnology studies the internal organs, while anthropology studies humans and cultures.

1137. Retinol is the chemical name of?

• A. Vitamin A
• B. Vitamin B
• C. Vitamin C
• D. Vitamin K

Explanation: Retinol is the alcohol form of vitamin A and is important for vision, epithelial tissues, and growth. Vitamins B, C, and K have different chemical forms and functions.

1138. Virus was discovered by?

• A. Dmitry Ivanovsky
• B. Robert hook
• C. Antony
• D. Brown

Explanation: Dmitry Ivanovsky provided the first evidence of viruses in 1892 while studying tobacco mosaic disease, whose infectious agent passed through bacteria-blocking filters. The other names listed are associated with microscopy or other discoveries.

1139. Which blood cells are called 'Soldiers' of the body ?

• A. WBC
• B. Platelets
• C. RBC
• D. All of the above

Explanation: White blood cells are called the body's soldiers because they identify and attack pathogens, providing immune defense. Red blood cells carry oxygen, while platelets help blood clot.

1140. In thrombocytopenia condition, bone marrow makes?

• A. Too few platelets
• B. Normal platelets
• C. Too many platelets
• D. Does not effect

Explanation: Thrombocytopenia means an abnormally low platelet count, usually because platelet production is reduced, destruction is increased, or both occur. Platelets are needed for normal blood clotting.