Biology MCQs

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Lactic Acid is a common end product of Anaerobic Respiration. Anaerobic respiration is the type of respiration through which cells can breakdown sugars to generate energy in the absence of oxygen.

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The zebrafish is a freshwater fish belonging to the minnow family. It is native to South Asia, it is a popular aquarium fish, frequently sold under the trade name zebra danio. It belongs to India and Sri Lanka.

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There are no antigens present in Blood group O. It has both anti-A and anti-B antibodies in the plasma and also some special “anti-A,B” antibodies. Blood group AB has both A and B antigens, but no antibodies.

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Kala Azar is also known as Dum dum fever and Visceral leishmaniasis . Its caused by protozoa of Leishmania genus, vector is sandfly

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Pearls are composed primarily of calcium carbonate, which is what gives them their unique luster. They are formed within the shell of certain mollusks as a defense mechanism against a potentially threatening irritant, such as a parasite. Over time, the mollusk continually deposits layers of calcium carbonate, which eventually forms a smooth, hard pearl. This process can take up to eight years.

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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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The breathing rate is controlled by the medulla in the brain, which is primarily sensitive to CO₂ levels in the blood.

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The pituitary gland is a small pea-sized gland that plays a major role in regulating vital body functions and general wellbeing. Through secretion of its hormones, the pituitary gland controls metabolism, growth, sexual maturation, reproduction, blood pressure and many other vital physical functions and processes.

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The term ‘living fossil’ represents the organisms that have survived major extinction events, with little evolutionary change for hundreds of millions of years. Ginkgo is one such example. Ginkgos are native to China and are virtually unchanged for over 200 million years. The water and pest resistant nature, coupled with an ability to cope with pollution, aids in their longevity. The plant is predominantly used for medicinal purposes, particularly in Traditional Chinese Medicine.

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The guinea pig or domestic guinea pig also known as cavy or domestic cavy, is a species of rodent belonging to the family Caviidae and the genus Cavia.