Biology MCQs

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Liver produces bile which is stored in the gall bladder. Liver is the largest gland in the body. Bite contains bite pigments and bite salts i.e. sodium and potassium glycocholates.

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The bark of the common Willow tree is the source of a wide range of phenolic glycosides, of which the most important is salicin. Salicin is metabolized into salicylic acid in the human body, and is a precursor of aspirin. It is used as a fever reducer, a mild pain reliever, and an anti-inflammatory.

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In human males, the sperms produced in testes are carried by a duct called vas deferens. The vas deferens unites with urethra coming from the urinary bladder. The urethra forms a common passage for both the sperm and urine as it is just one tube that connects both the glands– urinary bladder and vas deferens.

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Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).

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Kwashiorkor is a form of severe protein–energy malnutrition. It is characterized by edema, irritability, anorexia, ulcerating dermatoses, and an enlarged liver with fatty infiltrates. Sufficient calorie intake, but with insufficient protein consumption, distinguishes it from marasmus.

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Lichen is a symbiotic life form, that grows on the bark of tree as colored patches.It is an association between blue green algae and fungi. The combined lichen has properties different from those of its component organisms.

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The Annelida, also known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including ragworms, earthworms, and leeches. The fundamental characteristic of the phylum is the division of the body into a linear series of cylindrical segments, or metameres. Each metamere consists of a section of the body wall and a compartment of the body cavity with its internal organs.

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Ultrastrong spider silk is one of the toughest natural fibres known in nature. The light, flexible fibre is five times stronger by weight than high-grade steel and extremely stretchy, enlarging to snag incoming insects and other prey.

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In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

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Lysosomes are known as digestive bag because it digest every foreign material as well as worn out cell organelles. They contain powerful digestive enzymes which are capable of breaking down all organic materials.