Biology MCQs

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The most important role played by Ribosome in the cells is the synthesis of proteins. Ribosomes are composed of special proteins and nucleic acids.

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Hemodialysis is a procedure where a dialysis machine and a special filter called an artificial kidney, or a dialyzer, are used to clean your blood. It works on the principles of Diffusion & osmosis.

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The human musculoskeletal system consists of human skeleton, bones attached to other bones with joints and skeletal muscle attached to the skeleton by tendons. It permits movement of the body, maintains posture and circulates blood throughout the body.

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Liquorice root, or Mulethi, is a potent expectorant that has been utilized in Ayurvedic medicine since ancient times. The powdered root is used in “Jastimadhu” tooth powder. Many cough syrups incorporate Liquorice as one of their components. It is also used to treat mouth and peptic ulcers, attesting to its versatile medicinal properties. Liquorice root is well-regarded for its numerous health benefits apart from its sweet flavour.

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For reasons of safe transportation of fruits, mangoes, bananas etc are picked before they ripen fully. Slightly green harvested mangoes are subjected to small containers of calcium carbide (CaC2) with a plastic covering. CaC2 reacts with the moisture in the air to release acetylene (or ethyne) gas as follows:
CaC2 + 2 H2O – C2H2 + Ca(OH)2
This option may give you slightest confusion if you don’t know the difference between Ethylene and Ethyne (Acetylene). Both are chemical substances produced by fruits to accelerate the normal process of fruit maturation — is a ripening hormone. Ethylene is C2H4 and has a carbon-carbon double bond. Acetylene is C2H2 and has a carbon-carbon triple bind. Acetylene contains more energy and burns hotter than ethylene. Ethylene is a gaseous compound , Acetylene is the chemical compound , which is the simplest alkyne and is also a hydrocarbon while Ethylene is the simplest alkene and classified as an unsaturated hydrocarbon. I hope you will never forget it now.

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Saffron is a spice derived from the flower of Crocus sativus, commonly known as the “saffron crocus”. It is mainly grown in cold regions. Saffron’ is obtained from the stigma of the plant.

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All of the three –Herpetology, Ophiology and Serpentology are associated to the study of snakes.While Saurology is associated to the study of Lizards. Thus Option [D] is correct.

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Entomology is the scientific study of insects, a branch of zoology. In the past the term “insect” was more vague, and historically the definition of entomology included the study of terrestrial animals in other arthropod groups or other phyla, such as arachnids, myriapods, earthworms, land snails, and slugs.

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Photosynthesis, process by which green plants and certain other organisms use the chlorophyll and energy of sunlight to convert carbon dioxide and water into the simple sugar glucose.

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Turmeric is the rhizome or underground stem of a ginger-like plant. It is usually available under ground, as a bright yellow, fine powder.