Biology MCQs

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Opium is dried latex which is obtained from the seed capsules of the opium poppy Papaver somniferum.

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The corpus callosum is a large, C-shaped nerve fiber bundle which is found beneath the cerebral cortex. It stretches across the midline of the brain. IT connects the left and right cerebral hemispheres.

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When the body’s immune system cells destroy the insulin producing beta cells of the pancreas is termed as Type 1 diabetes. Symptoms may include increased thirst, frequent urination, hunger, fatigue and blurred vision.

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In Ginger the part that we eat is actually the root which is also called as Rhizome of the plant. A rhizome is a modified stem that grows horizontally underground.

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Christian Gottfried Ehrenberg was a was one of the most famous and productive scientists of his time. He was a German naturalist, zoologist, comparative anatomist, geologist, and microscopist. He coined the term Bacterium.

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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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In mammals and the more complex life forms, the two lungs are located near the backbone on either side of the heart.Mammalian lungs have an enormous number of minute alveoli (air sacs).

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The target of antidiuretic hormone is the collecting duct of the nephron. If ADH is released, less urine is excreted.

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First statement is incorrect because secretion of hormones is absent in large intestine. Small intestine secretes hormones. Other three statements are correct.

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A viral disease (or viral infection or infectious disease), occurs when an organism’s body is invaded by pathogenic virus, and infectious virus particles (virions) attach to and enter susceptible cells.