Biology MCQs

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Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells of almost all vertebrates as well as the tissues of some invertebrates. Haemoglobin in the blood carries oxygen from the lungs or gills to the rest of the body.

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A noncommunicable disease (NCD) is a medical condition or disease that is by definition non-infectious and non-transmissible among people. Eg. Cancer which is also called malignancy, is an abnormal growth of cells.

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Natural Pearls are formed when an irritant usually a parasite works its way into an oyster, mussel, or clam. As a defense mechanism, a fluid is used to coat the irritant. Layer upon layer of this coating, called nacre, is deposited until a lustrous pearl is formed.

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It is a member of the group of diseases known as tinea. Athlete’s foot is caused by a number of different fungi, including species of Trichophyton, Epidermophyton, and Microsporum. The condition is typically acquired by coming into contact with infected skin, or fungus in the environment.

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Heart has four chambers, left & right ventricles and left & right atria which are synchronized to act together. A condition in which synchronizm does not take place is know as fibrillation. Fibrillation of atrial muscles is called as atrial fibrillation, fibrillation of the ventricular muscles is termed as ventricular fibrillation. In atrial fibrillation the ventricles functions normally, but respond with an irregular rhythm. In atrial fibrillations circulation is maintained, although not as efficiently. Ventricular fibrillation is more dangerous, as the ventricle are unable to pump the blood. There are many methods of correcting fibrillation mechanically, includingA.C. defibrillation & D.C. defibrillation. (Source: The Hindu Speaks on Science). Kindly read about working of Human Heart, particularly, how blood passes in 4 different parts of Human heart.

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The study of cell or cell biology is called cytology. The initial phase of cytology began with the English scientist Robert Hooke’s microscopic examination of cork in 1665. He observed dead cork cells and introduced the word “cell” to describe them.

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Ethnobotany is the study of the plants of an area and their practical uses through the traditional knowledge of a local culture and people.

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Mycology is the branch of biology that deals with the study of fungi, including their genetic and biochemical properties.

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The plant kingdom consists of 390,000 species known till date. The plant kingdom is divided into five major groups: Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms.

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Diatoms are unique among microorganisms in that they have rigid cell walls made of silica, called frustules. These frustules are intricately patterned and provide protection to the diatom cell. The silica frustules are durable and resist decomposition, which helps diatoms to maintain their structural integrity and avoid rapid decay.