General Science Questions (MCQs) for Competitive Examinations

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The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud chewing animals; still they do not develop diabetes.

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Phototropism is the growth of organisms in response to light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light.

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Dermatitis, also known as?eczema, is a group of diseases that results ininflammationof the?skin. These diseases are characterized by?itchiness, red skin, and a rash. Itai-Itai is caused by cadmium poisoning and Minamata due to mercury poisoning.

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The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. i.e. in maintaining and coordinating body posture at different times of the day/night.

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Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.

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A webbed neck, or pterygium colli deformity, is a congenital skin fold that runs along the sides of the neck down to the shoulders. It is a feature of Turner syndrome and Noonan syndrome, as well as the rarer Klippel-Feil syndrome. Turner Syndrome (TS) is a condition in which a female is partly or completely missing an X chromosome.

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Fermentation is the process by which complex organic compounds, such as glucose, are broken down by the action of enzymes into simpler compounds in the absence of oxygen (anaerobic). Yeasts can convert sugars to alcohol and carbon dioxide by fermentation. Fermentation is used to produce wine, beer, yogurt and other products.

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DNA does not directly control the formation of a polypeptide. However, it forms an intermediate template mRNA molecule, which directs the synthesis of polypeptide. The DNA can be compared to a master copy that is carefully preserved in the nucleus and used for preparing working copies in the form of mRNA molecules.

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Opium is the dried latex obtained from the opium poppy. Opium contains approximately 12% morphine, an alkaloid, which is frequently processed chemically to produce heroin for the illegal drug trade. The latex also includes codeine and non-narcotic alkaloids such as papaverine, thebaine and noscapine.

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The arteries (red) carry oxygen and nutrients away from your heart, to your body’s tissues. The veins (blue) take oxygen-poor blood back to theheart. Arteries begin with the aorta, the large artery leaving the heart. They carry oxygen-rich blood away from the heart to all of the body’s tissues.