Biology MCQs

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Plasmodium, a tiny protozoan is responsible for malarial disease. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.

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Daltonism refers to the Colorblindness of the red-green type which is also known as deuteranopia or deuteranomaly.The term “Daltonism” is derived from the name of the chemist and physicist, John Dalton (1766-1844).

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Mitochondrion is essential for Cellular respiration. Mitochondria are also responsible for generating clusters of iron and sulphur. Iron and Sulphur are important cofactors of many enzymes.

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The pancreatic islets or islets of Langerhans are the regions of the pancreas that contain its endocrine which is also called as hormone-producing cells. They are also known as the insulin-producing tissue.

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Necrosis is the name of premature death of cells and living tissue. It refers to the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.

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“Pratham” the first animal born in 1990 by the IVF (In vitro Fertilization) at the National Dairy Research Institute, Karnal was a buffalo.

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Overdose of antibiotics will cause the suppression of synthesis biotin in human body. Biotin is also known as vitamin H, vitamin B₇ or vitamin B₈ and is involved in a wide range of metabolic processes, primarily related to the utilization of fats, carbohydrates, and amino acids.

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Urea is a nitrogenous waste that is produced in the liver; urine is produced in the kidney. We note here that Uric acid is excreted as a crystal to conserve water by many terrestrial animals. However, humans and earthworms release nitrogenous waste in the form of urea.

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Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain in 1915. It is a virus which parasitizes a bacterium by infecting it and reproducing inside it. Bacteriophages are much used in genetic research.

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Cells of the epidermis produce root hairs near the root apex. These cells are generally thin-walled, in contrast to the cells of the cortex, lying below the surface, which ultimately may become very thick-walled. The root hairs have fundamental importance in absorption of water and nutrients.