Biology Quiz 5

Ascorbic acid – Vitamin-C, Chlorophyll – Photosynthetic pigment, Carotenoid – Quencher, Superoxide dismutase – Enzyme. Superoxide dismutase (SOD) is an enzyme found in all living cells.

A diuretic, also called water pill, is a medicine which promotes the secretion of urine. It is a medication designed to increase the amount of water and salt expelled from the body as urine.

Tissue culture (micropropagation) is the growth of tissues or cells in an artificial medium separate from the parent organism. It is a technique in which fragments of plants are cultured and grown in a labouratory.

Seasickness is a result of a conflict in the inner ear, where the human balance mechanism resides, and is caused by a vessel's erratic motion on the water.

Keratin is a type of structural protein which makes the skin layer impervious to water. It is found on epithelial cells, which line the inside and outside surfaces of the body. Keratins help form the tissues of the hair, nails, and the outer layer of the skin.

The adult human brain weighs about 1200–1400 gm which is about 2% of the total body weight. The weight of an average human brain is about 1.36 kg.

There is no life on Moon because it has no water. Water is essential to life because all life forms are dependent on it. Life began in the presence of water. Almost all the reactions of a cell occur in the presence of water.

The human skeleton of an adult consists of around 206 bones. There are typically around 270 bones in human infants, which fuse to become 206 to 213 bones in the human adult.

Biome is the total interaction between animals and plants in any well-defined area. It refers to the community of plants and animals that occur naturally in an area, often sharing common characteristics specific to that area.

Animal protein is called first-class protein because it is rich in essential amino acids. It is superior to plant protein because animal proteins contain a broad spectrum of amino acids with more vitamins and minerals than plant proteins.