Biology MCQs

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In liver Simple sugars (monosaccharides) which are in excess are converted into complex polysaccharides like glycogen

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Malaria (It is a disease caused by Protozoa Plasmodium family)

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Meningitis is a disease which is characterized by inflammation of meninges, the covering that lie over the brain and spinal chord is caused by bacteria. The meninges are the three membranes that cover the brain and spinal cord.

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Sugar, Amino Acids, & Nucleotides are constituents of respectively Polysaccharides, Proteins and Nucleic Acids. Nucleotides are organic molecules which are the building blocks of nucleic acids.

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RSV Virus (respiratory syncytial virus) is also called as “Hit & Hide” virus. It causes infections of the lungs and respiratory tract. It is a major cause of lower respiratory tract infections.

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The human body needs red blood cells and platelets to remain healthy. But in Leukemia increased white blood cells crowd out the red blood cells and platelets. Leukemia is a blood cancer caused by a rise in the number of white blood cells in your body.

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As cells develop some genes are turned off permanently. All of the cells within a complex multicellular organism such as a human being contain the same DNA; however, the body of such an organism is clearly composed of many different types of cells. What, then, makes a liver cell different from a skin or muscle cell? The answer lies in the way each cell deploys its genome. In other words, the particular combination of genes that are turned on (expressed) or turned off (repressed) dictates cellular morphology (shape) and function. This process of gene expression is regulated by cues from both within and outside cells, and the interplay between these cues and the genome affects essentially all processes that occur during embryonic development and adult life. This means that cells become specialized because the genes that are not required are switched off. Only the genes needed to make a particular type of cell work are switched on. So muscle cells only have the genes needed to make muscle cell proteins switched on. All the other genes, such as those needed to make blood cell proteins and nerve cell proteins, are switched off. But the stem cells are unspecialized and can develop into various tissues.

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Snakes have the maximum number of ribs. On an average they have 200 to 400 bones (Vertibrae ) and each have a pair of ribs on either side.

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The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.

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Malaria is a life-threatening disease. It’s typically transmitted through the bite of an infected Anopheles mosquito. Infected mosquitoes carry the Plasmodium parasite. When this mosquito bites you, the parasite is released into your bloodstream.