Biology MCQs

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The ringworm of Beard is also called Tinea barbae. This is a superficial fungal infection of the skin, hair, and hair follicles caused by dermatophytes.

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Compound manure is made of Rotted vegetables and animal refuse. A fertilizer that contains two or more nutrients and is also known as a multi-nutrient fertilizer is called Compound manure.

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GM rice is enriched with vitamins A. Genetically modified rice are strains of rice that have been genetically modified.

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The origin of replication is a sequence of DNA on which replication is initiated on a chromosome, plasmid or virus.

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Like all other insects, in a mosquito, the thorax is specialized for locomotion. Three pairs of jointed legs and a pair of wings are attached to the thorax. The insect wing is an outgrowth of the exoskeleton therefore analogous to winds of a birds.

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The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the opening. Guard cells are specialized cells in the epidermis of leaves, stems and other organs that are used to control gaseous exchange and rate of transpiration.

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Meibomian glands are the tiny oil glands which line the margin of the eyelids (the edges which touch when the eyelids are closed). These glands secrete oil which coats the surface of our eyes and keeps the water component of our tears away from evaporating (drying out). Together, the water and the oil layer make up the tear film.

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Insulin is a hormone secreted by the pancreas that is important for metabolism and utilization of energy from the ingested nutrients – especially glucose. It keeps our blood sugar level from getting too high (hyperglycemia) or too low(hypoglycemia). The pancreas is a glandular organ in the digestive system and endocrine system of vertebrates.

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Agar, one of the commercial products obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies. The gelling agent in agar is an unbranched polysaccharide obtained from the cell walls of Gelidium and Gracilaria. For commercial purposes, it is derived primarily from Gelidium amansii. In chemical terms, agar is a polymer made up of subunits of the sugar galactose.

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Mangifera indica is commonly known as mango. It is a species of flowering plant in the sumac and poison ivy family Anacardiaceae. It is found in the wild in Bangladesh, India and Pakistan where it is indigenous. It is the national fruit of India, Pakistan and the Philippines.