Biology MCQs

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Dr. Joseph Lister was a British surgeon and a pioneer of the antiseptic surgery. His research into bacteriology and infection in wounds, raised his skillful operative technique, that was similar to his peers.

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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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Dengue which is found in tropical and subtropical regions around the world is a mosquito borne disease and caused by a virus. Symptoms typically begin to appear three to fourteen days after infection.

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The pancreatic islets or islets of Langerhans are the regions of the pancreas that contain its endocrine which is also called as hormone-producing cells. They are also known as the insulin-producing tissue.

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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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Vitamin C is a water-soluble vitamin. Scurvy is caused by the deficiency of Vitamin C. Human body cannot produce vitamin C hence it is taken externally. Vitamin C is not a hormone.

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This is a unique example of convergent evolution in which organs can serve similar purposes but originate from very different original structures. Wings of a bat and bird serve the same purpose, flight, yet they have different underlying structures, resulting from a different evolutionary path.

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Algae is an informal term for a large, diverse group of photosynthetic eukaryotic organisms that are not necessarily closely related, and is thus polyphyletic.

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Any legume plants will help in nitrogen fixation. Beans contain symbiotic bacteria called Rhizobia within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants and this helps to fertilize the soil.

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Double-cross hybrid is the type of hybrid that is produced when two different single-cross hybrids are cross-pollinated.