All Free Everyday Science MCQs with Answers

1221. The tread mills training is prescribed for the injured athlete for the purpose of improving his/her_________?

• A. Muscle strength
• B. Stability of the body
• C. Range of motion
• D. Muscle endurance

Explanation: Regular treadmill training mainly develops cardiovascular and muscle endurance because the muscles work continuously over an extended period. Strength, stability, and range of motion require more specific exercises.

1222. To which of the following chambers of the heart, is the aorta connected?

• A. Left ventricle
• B. Right ventricle
• C. Right auricle
• D. Left auricle

Explanation: The aorta leaves the left ventricle and carries oxygen-rich blood to the body. The right ventricle instead pumps deoxygenated blood toward the lungs through the pulmonary artery.

1223. Blood is cleaned by __________?

• A. Lungs
• B. Liver
• C. Heart
• D. Kidneys

Explanation: The kidneys clean the blood by filtering wastes, excess salts, and water to form urine. The liver also detoxifies substances, but routine filtration of blood is chiefly a kidney function.

1224. Vitamins were discovered by__________?

• A. Moesley
• B. Chadwick
• C. Frank Whittle
• D. Casimir Funk

Explanation: Casimir Funk isolated a substance associated with vitamin B1 and introduced the term “vitamine,” later shortened to “vitamin.” The other names are associated with nuclear science or aviation, not vitamin discovery.

1225. Any disease or infection that is naturally transmissible from vertebrate animals to humans is called?

• A. Zonoses
• B. Zoonoses
• C. Ananoses
• D. Chordnoses

Explanation: A zoonosis is an infection naturally transmitted from vertebrate animals to humans, such as rabies or some forms of influenza. “Zoonoses” is the plural form, but it is the intended option here.

1226. Ageusia is the loss of which sense?

• A. Taste
• B. Smell
• C. Memory
• D. Sight
• E. Listening

Explanation: Ageusia means loss or marked reduction of the sense of taste. Loss of smell is called anosmia, which is the likely source of confusion.

1227. Which of the following is used for hearing the sound of heart and lungs?

• A. Steroscope
• B. Stethoscope
• C. Oscillator
• D. Oncolator

Explanation: A stethoscope transmits and amplifies body sounds, allowing a doctor to hear the heart and lungs. The other listed terms are not instruments used for routine auscultation.

1228. Red blood cells are produced in_________?

• A. Liver
• B. Heart
• C. Spleen
• D. Bone-marrow

Explanation: In adults, red blood cells are formed mainly in the red bone marrow, where stem cells develop into blood cells. The liver and spleen help process or remove blood cells but are not the main production site.

1229. Who discovered the Polio Vaccine?

• A. Jonas Salk
• B. Jaber Ibn Hayan
• C. Selman Waksman
• D. None of these

Explanation: Jonas Salk developed the first successful widely used inactivated polio vaccine in the 1950s. Albert Sabin later developed the oral polio vaccine.

1230. Who was the surgeon who pioneered antiseptic surgery in 1865?

• A. Edward Jenner
• B. Joseph Lister
• C. Henry William
• D. John Sleeman

Explanation: Joseph Lister pioneered antiseptic surgery by applying germ theory and using antiseptic methods, including carbolic acid, to reduce infections. Edward Jenner is associated with the smallpox vaccine, not antiseptic surgery.