Everyday Science 2131 MCQs [All-Courses]

Sheep (Dolly was the world's first mammal cloned from an adult cell, created in 1996 in Scotland using somatic cell nuclear transfer at the Roslin Institute.)

• Ptyalin is also called salivary amylase.
• It is secreted by the salivary glands in the mouth.
• Its main function is to digest starch.
• Ptyalin converts starch into maltose and dextrin.

• When a ball is thrown vertically upward, gravity acts downward, slowing the ball.
• As the ball goes up, its velocity decreases continuously.
• At the highest point, the ball stops for an instant before coming down.
• At that instant, the velocity becomes zero (but acceleration due to gravity is still present).

• Wind is the movement of air from high-pressure areas to low-pressure areas.
• When atmospheric pressure decreases in a region, it creates a low-pressure area.
• Air from surrounding high-pressure areas rushes toward the low-pressure area.
• This horizontal movement of air is called wind.

• A false ceiling is a secondary ceiling hung below the main roof/ceiling.
• It is used for thermal insulation (heat control).
• Also provides sound insulation.

• The Muslim scientist is Ibn al-Nafis.
• He is credited with explaining the pulmonary circulation of blood and recognizing the contagious nature of diseases, centuries before these ideas became known in Europe.

• An earthquake is measured using a seismograph (also called a seismometer).
• It records the vibrations of the Earth caused by seismic waves during an earthquake.

• The pancreas is a gland located behind the stomach.
• It produces insulin and other hormones to regulate blood sugar and enzymes to help digest food.
• The pancreas plays a key role in both the digestive and endocrine systems.

• The mosquito carries the Plasmodium parasite, which enters the human bloodstream during a bite.
• Malaria cannot spread directly from person to person without a mosquito vector.

• Blood flows very slowly in capillaries to allow efficient exchange of oxygen, nutrients, and waste between blood and tissues.
• This slow speed is essential for proper functioning of the body’s cells.