Biology MCQs

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Animal cells do not have cell walls. Cell walls are found in plant cells. Other given organelles like Mitochondria, Ribosome and Cytoplasm are present in animal cells.

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The calorie is a unit of energy widely used in nutrition. The small calorie or gram calorie is the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius.

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Cervical vertebrae are found in neck. The cervical vertebrae of the spine is consisted of seven bony rings that reside in the neck between the base of the skull and the thoracic vertebrae in the trunk.

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Hargobind Khurana’s work on the interpretation of the genetic code and its function in protein synthesis, showing how the order of nucleotides in nucleic acids, which carry the genetic code of the cell, encode the proteins synthesized by the cell . They established the biological language or genetic code common to all living organisms, is spelled out in three-letter words: each set of three nucleotides codes for a specific amino acid.

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Hydrogen in the human body / organ makes the main basis of working of the MRI (Magnetic resonance imaging). It is a medical imaging technique which is used in radiology to form pictures of the anatomy and the physiological processes of the body.

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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 useful part of Zingiber officinale is rhizome. It is a flowering plant whose rhizome, ginger root or ginger, is widely used as a spice and also as a medicine. It is a herbaceous perennial plant.

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The Plasmodium parasite that causes malaria is neither a virus nor a bacterium – it is a single-celled parasite that multiplies in red blood cells of humans as well as in the mosquito intestine. When the female mosquito feeds on an infected person, male and female forms of the parasite are ingested from human blood.

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Most salmon are anadromous fish which means that they are born in freshwater (rivers or streams), and travel to and live much of their lives in salt water and return to freshwater during reproduction and spawning. After spawning, all Pacific salmon and up to 50% of other species die within a few weeks.

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Water hyacinth, an aquatic plant of the genus Eichhornia of the pickerelweed family, consisting of about five species is native primarily to tropical America. Some species float in shallow water; others are rooted in muddy stream banks and lakeshores.