All Free Everyday Science MCQs with Answers

1281. Hepatitis C is a leading cause of_________?

• A. HIV
• B. Diabetes
• C. Chronic Liver disease
• D. AIDS

Explanation: Hepatitis C virus attacks the liver and can persist for years, causing chronic hepatitis, cirrhosis and liver cancer. It does not cause HIV, diabetes or AIDS.

1282. Which of the following is both endocrine and exocrine gland?

• A. thyroid
• B. pancreas
• C. parathyroid
• D. all of these

Explanation: The pancreas has an exocrine role, releasing digestive enzymes through a duct, and an endocrine role, releasing hormones such as insulin into the blood. The thyroid and parathyroid are endocrine glands only.

1283. All of the following organs in the human body are located both on the right and the left sides, except;_________?

• A. Lungs
• B. Kidneys
• C. Spleen
• D. Eyes

Explanation: The spleen is normally a single organ on the left side of the upper abdomen. The lungs, kidneys and eyes occur as paired organs on the right and left sides.

1284. Birth control pills contain synthetic________?

• A. Sugars
• B. Hormones
• C. Vitamins
• D. Minerals

Explanation: Birth-control pills contain synthetic versions of ovarian hormones, usually oestrogen, progestin or progestogen. These hormones suppress ovulation and make fertilisation less likely.

1285. What part of the brain controls thirst and hunger?

• A. Thalamus
• B. Hypothalamus
• C. Aymgdala
• D. None

Explanation: The hypothalamus monitors the body's fluid balance and energy needs, triggering thirst and hunger. The thalamus mainly relays sensory signals, while the amygdala is linked to emotion.

1286. Which waves are used in sonography?

• A. Ultrasonic waves
• B. Electromagnetic Waves
• C. Fundamentals of waves
• D. Transverse wave

Explanation: Sonography forms images by sending high-frequency sound waves into the body and recording their echoes. These inaudible sound waves are called ultrasonic waves, not electromagnetic waves.

1287. Which organ is considered as chemical factory of human body ?

• A. Stomach
• B. Intestine
• C. Liver
• D. Kidneys

Explanation: The liver is called the body's chemical factory because it carries out metabolism, detoxification, bile production and the processing of nutrients and medicines. The stomach and intestines mainly digest and absorb food, while the kidneys chiefly filter blood and form urine.

1288. Involuntary muscles in a human body are present in__________?

• A. Brain
• B. Tongue
• C. Digestive system
• D. Limbs

Explanation: The digestive system contains smooth muscle, which contracts automatically to move and mix food. These muscles are involuntary, unlike most muscles of the limbs that can be consciously controlled.

1289. Which of the following has not involuntary muscles?

• A. Bigestive System
• B. Blood Vessels
• C. Heart
• D. Brains

Explanation: The brain is nervous tissue and does not contain muscles, whereas the digestive tract, blood vessels and heart contain muscles that work involuntarily. “Bigestive System” is evidently a misspelling of digestive system.

1290. The contraction and expansion of the movement of the walls of the food pipe after entering the slightly digested food is known as ______ movement

• A. Gastric
• B. Diastolic
• C. Peristaltic
• D. Oscillatory

Explanation: Peristalsis is the wave-like contraction and relaxation of the alimentary canal that pushes food forward. Gastric refers to the stomach, while diastolic describes the relaxation phase of the heart.