Explanation

• Microtubules are cytoskeletal filaments responsible for movement inside cells.
• They help in transporting organelles within the cell.
• They also play a key role in cell division.
• They act as “tracks” for intracellular movement.

Last verified on 04-06-2026

Explanation

• Glass snake is actually not a true snake.
• It is a legless lizard that resembles a snake.
• Coral snake → True snake
• Sea snake → True snake
• Rattlesnake → True snake

Last verified on 04-06-2026

Explanation

• H. J. Muller was the first scientist to induce mutations using X-rays in fruit flies (Drosophila).
• His groundbreaking experiments were conducted in 1927.
• He demonstrated that X-rays can cause genetic changes (mutations).
• This discovery greatly advanced the field of genetics.

Last verified on 04-06-2026

Explanation

• Cell specialization (differentiation) occurs when cells perform specific functions.
• Specialized cells have the same DNA but use different genes.
• Different genes are turned on or off according to the cell's role.
• This process allows the formation of tissues and organs.

Last verified on 04-06-2026

Explanation

• A Barr body is a densely staining structure found in the nuclei of female somatic cells.
• It represents an inactive X chromosome.
• It is visible during the interphase stage of the cell cycle.
• It helps in dosage compensation between males and females.

Last verified on 04-06-2026

Explanation

• DNA stands for Deoxyribonucleic Acid.
• DNA is a biological molecule found in all living cells.
• It carries genetic information from parents to offspring.
• It controls growth, development, and body functions.
• DNA is present in the nucleus of cells (mainly in chromosomes).
• It is made of nucleotides arranged in a double helix structure.
• It was discovered by James Watson and Francis Crick (1953 structure model).

Last verified on 01-06-2026

Explanation

• Cinchona bark contains quinine, which is used to treat malaria.
• Quinine is also used in tonic water.
• It belongs to the family Rubiaceae.
• Cinchona is also called the “fever tree”.

Last verified on 31-05-2026

Explanation

• Milk, butter, and ghee are rich in fat-soluble vitamins, especially A and D.
• These vitamins help in vision, bone strength, and calcium absorption.
• They are considered energy-giving and body-building foods.

Last verified on 30-05-2026

Explanation

• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• The nucleus contains DNA (genetic material).
• It controls all cellular activities like growth, division, and protein synthesis.
• That is why it is called the control center of the cell.

Last verified on 25-05-2026