Biology MCQs

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Sushruta practiced during the 5th century B.C. many of his contributions to medicine and surgery preceded similar discoveries in the Western world. He is known as the ‘Father of Surgery’.

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Blood plasma is the liquid component of whole blood, and makes up approximately 55% of the total blood volume. It is composed primarily of water with small amounts of minerals, salts, ions, nutrients, and proteins in solution. In whole blood, red blood cells, leukocytes, and platelets are suspended within the plasma.

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99% of body’s calcium is stored in Bones and teeth. The remainder of the calcium is present in blood, extracellular fluid, muscle, and other tissues. It plays a role in mediating vascular contraction and vasodilation, muscle contraction, nerve transmission, and glandular secretion.

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Hodophobia is the fear of travel. It is also referred to as travel phobia or fear of travel. Acute anxiety which is provoked by travel can be treated with anti-anxiety medication.

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Dr. Robert Koch was a German (Prussian) physician. In 1877 he isolated Bacillus anthracis (causative agent of Anthrax) . He also isolated Tuberculosis bacillus (Causative agent of TB) and Vibrio cholera (causative agent of Cholera). He is also known to develop Koch’s postulates, the four criteria designed to establish a causal relationship between a causative microbe and a disease. He was awarded the Nobel Prize in Physiology or Medicine for his tuberculosis findings in 1905.

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Corals and sea anemones both belong to Phylum Cnidaria, sharing similar evolutionary lineages as simple, radially symmetrical, aquatic invertebrates. Sea cow (mammal), sea horse (fish), and sea lion (mammal) are distantly related and do not share this close evolutionary relationship with corals. Hence, option 4 is correct.

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Bacterium contain no membrane bound nucleus and rarely contain membrane bound organelles. Simply, most don’t have any large organelles with their own membranes; this means no nucleus, no mitochondria and no chloroplast. Even if a bacteria wanted to have mitochondria , it is couldn’t.

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The connective tissues include several types of fibrous tissue that vary only in their density and cellularity, as well as the more specialized and recognizable variants—bone, ligaments, tendons, cartilage, and adipose tissue. Skin is not a connective tissue. It is the body’s largest organ and consists of multiple layers, including the epidermis (outermost layer) and the dermis (deeper layer). Skin primarily serves as a protective barrier and regulates temperature, but it is mainly classified as an epithelial tissue due to its structure and function.

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Adrenaline, also known as epinephrine, is a hormone, neurotransmitter, and medication. Adrenaline is normally produced by both the adrenal glands and certain neurons.

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The annelids (Annelida, from Latin anellus, “little ring”), also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.