Explanation

• Taq polymerase is an enzyme extracted from the bacterium Thermus aquaticus.
• It is heat-stable, allowing DNA amplification at high temperatures in PCR (Polymerase Chain Reaction).
• Crucial for modern molecular biology and genetic research.

Last verified on 03-02-2026

Explanation

• Recombinant DNA is formed by combining DNA from two different sources.
• This technology allows insertion of a gene from one organism into another.
• Used in medicine, agriculture, and biotechnology for desired traits.

Last verified on 03-02-2026

Explanation

• Refrigerants are gases used in refrigerators to absorb heat and provide cooling.
• Freon (CFCs) and ammonia are commonly used in domestic and commercial refrigeration.
• They evaporate at low temperatures, absorbing heat from the fridge interior.
  

Last verified on 03-02-2026

Explanation

• Location: Upper limbs / shoulder girdle
• Common Name: Shoulder blade
• Number: 2 scapula bones (left & right)
• Connected Bones: Clavicle and humerus
• Function: Supports shoulder & arm movement

Last verified on 03-02-2026

Explanation

• In the human digestive system, food is broken down into nutrients through chemical and mechanical processes.
• Mouth, small intestine, and large intestine play roles in digestion.
• But the esophagus only transports food from mouth to stomach and does not digest it.

Last verified on 02-02-2026

Explanation

• Maltose is broken down by the enzyme maltase into glucose in the small intestine.
• This glucose is then absorbed into the bloodstream for energy.

Last verified on 02-02-2026

Explanation

• Human body cells renew at different rates depending on function and wear.
• Gut cells (intestinal epithelial cells) are the most rapidly replacing cells, regenerating every 2–5 days.

Last verified on 01-02-2026

Explanation

• Electrical conductivity measures how easily a material allows electric current to pass.
• Silver is the best conductor of electricity due to its high number of free electrons.

Last verified on 01-02-2026

Explanation

Explanation

• Citrus fruits are rich in Vitamin C, which is essential for immunity.
• Vitamin C also helps in wound healing, collagen formation, and iron absorption.
• Citrus fruits include oranges, lemons, limes, and grapefruits.

Last verified on 25-01-2026