Biology MCQs

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Auxins are a class of plant hormones with some morphogen-like characteristics. Auxin is basically a Weak Organic Acid and It is produced in the stem tip that promotes the elongation in the cells.

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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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The pituitary gland or hypophysis is located in one of the bones at the base of the skull. It has two portions viz. anterior hypophysis and posterior hypophysis.
The anterior part produces two hormones that work directly viz. growth hormone (GH) and prolactin; and four tropic hormones {tropic hormones regulate the other endocrine glands} viz. adrenocorticotropic hormone (ACTH), thyroid-stimulating hormone (TSH), luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
The posterior part releases two hormones produced in the hypothalamus viz. oxytocin and antidiuretic hormone (ADH or vasopressin).

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The name of Karl Landsteiner is associated with the discovery of Human Blood Groups. He was given the Nobel Prize for Physiology or Medicine in 1930 for his discovery in 1901 of, and outstanding work on, the blood groups.

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Japanese encephalitis is caused by virus from the family Flaviviridae. It’s a Mosquito Borne Disease

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Made up of 47 million nucleotides, Chromosome 21 is the smallest Human Chromosome.

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Gout is caused by deposition of uric acid crystals in the joint, causing inflammation. There is also an uncommon form of gouty arthritis caused by the formation of rhomboid crystals of calcium pyrophosphate known as pseudogout. In the early stages, the gouty arthritis usually occur in one joint, but with time, it can occur in many joints and be quite crippling. The joints in gout can often become swollen and lose function.

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Pigeons have become useful bioindicators for lead pollution due to their widespread presence in cities and their ability to accumulate and retain heavy metals, including lead, in their tissues. Researchers have found that the feathers, blood, and tissues of pigeons can provide valuable information about the levels of lead exposure in the environment.

Lead pollution in cities can come from various sources, including lead-based paints, industrial emissions, and traffic-related sources. Pigeons, being urban birds, are exposed to these sources and can accumulate lead over time. By studying lead levels in pigeon populations, scientists can gain insights into the extent of lead pollution in a city and assess its potential risks to both wildlife and humans.

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Deoxyribose is a Monosaccharide sugar.

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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.