Biology MCQs

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Hemophilia A is characterized by a deficiency of the anti-hemophilia globulin factor.

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Optimum conditions for the catalyst is another important research area of biotechnology offers.

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Identification of drugs through genomic studies is called Pharmacogenomics. Pharmacogenomics may improve health care costs and efficiency.

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Vitamin C is quite unstable when cooked or stored improperly. It is very liable and easily destroyed during cooking as well as storage. It is a water-soluble and temperature-sensitive vitamin, so is easily degraded during cooking, and elevated temperatures and long cooking times have been found to cause particularly severe losses of vitamin C.

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Various components of blood are: Plasma, Erythrocytes (Red Blood Cells), Leucocytes (White Blood Cells) and Thrombocytes/Platelets. Monocytes, also known as macrophages, are the largest blood cells in most mammals, measuring 10-15 cm in diameter. They are leucocytes. Their nuclei are kidney-shaped and cytoplasm is abundant.

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In an autosomal dominant disorder, the mutated gene is a dominant gene located on one of the nonsex chromosomes (autosomes). The early-onset form of Alzheimer disease is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. In most cases, an affected person inherits the altered gene from one affected parent.

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Taxonomy is the academic discipline of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups. Each group (taxon) is given a rank and groups of a given rank can be aggregated to form a super group of higher rank and thus create a hierarchical classification. Carlous Linneaus is considered as father of taxonomy.

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Vitamin E refers to a group of eight fat-soluble compounds that include both tocopherols and tocotrienols. Numerous foods provide vitamin E. Nuts, seeds, and vegetable oils are among the best sources of alpha-tocopherol, and significant amounts are available in green leafy vegetables and fortified cereals.

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For keeping the stomata open a constant expenditure of energy is required. This is required for conversion of starch to sugar. The stomatal opening is, in turn, related to transpiration which is the evaporation of water from plants. It occurs chiefly at the leaves while their stomata are open for the passage of CO2 and O2 during photosynthesis.

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Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.