Biology MCQs

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Bulbs like garlic and onion store food in the form of sugar (sucrose) rather than starch. . This is also true of sugar beet, sugarcane, etc. In onions, the food is stored in its scale leaves.

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Chocolate production starts with harvesting cocoa in a forest. Cocoa comes from tropical evergreen Cocoa trees, such as Theobroma Cocoa which are small trees. These trees live in the understory of tropical forests and require other, taller trees to shelter them from wind and sun.

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Animal and vegetable fats serve as a concentrated energy source and are the highest energy sources in feedstuffs. Dietary fats and oils are a concentrated source of energy when compared to carbohydrate and protein, having over twice the amount of calories per gram.  Fats contain 2.25 times the calories per gram than protein or carbohydrates. Fats contain 9 calories/gm while protein and carbohydrates contain 4 calories per gram.

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Thymus gland also called a degenerating gland as it starts its degeneration form an age of 17-18 years onward is the site of lymphocytes called Tlymphocytes to provide defense to body. A lymphocyte is a type of white blood cell that is part of the immune system. There are two main types of lymphocytes: B cells and T cells. The B cells produce antibodies that are used to attack invading bacteria, viruses, and toxins.

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Nitrosomonas is a genus comprising rod shaped chemoautotrophic bacteria. These rare bacteria oxidize ammonia into nitrite as a metabolic process. Nitrosomonas are useful in treatment of industrial and sewage waste and in the process of bioremediation.

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To prepare the cotton fabric for dyeing, printing and finishing process, scouring and bleaching is the fundamental step. After scouring and bleaching, cotton is 99% cellulose. Cellulose is a macromolecule- a polymer made up of a long chain of glucose molecules linked by C-1 to C-4 oxygen bridges with elimination of water (glycoside bonds).

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Fertilization is the process of fusion of the male and the female gametes. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female. Humans provide an example of the former whereas seahorse reproduction is an example of the latter.

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Bt Brinjal is a genetically modified (GM) crop created by inserting Cry 1Ac gene from the soil bacterium Bacillus thuringiensis into Brinjal. The insertion of the gene gives Brinjal plant resistance against lepidopteron pets/insects like the Brinjal Fruit and Shoot Borer (Leucinodes orbonalis) and Fruit Borer (Helicoverpa armigera).

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The photosynthetic efficiency is the fraction of light energy converted into chemical energy during photosynthesis in plants and algae. Approximately two thirds of the net global photosynthetic productivity worldwide is of terrestrial green plant origin. The remainder is produced mainly by phytoplankton (microalgae) in the oceans. Approximately 114 kilocalories of free energy are stored in plant biomass for every mole of CO2 fixed during photosynthesis.

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Mumps is an infection caused by a virus and spread human-to-human via direct contact or by airborne droplets. It is sometimes called infectious parotitis, and it primarily affects the salivary glands. Mumps is generally a mild childhood disease, most often affecting children between five and nine years old.