General Science Questions (MCQs) for Competitive Examinations

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Union Health Minister JP Nadda, in April 2017, launched the Test and Treat policy for Human Immunodeficiency Virus (HIV) patients. Under this new policy, anyone who is tested and found positive will get the necessary treatment free of cost. Anyone found positive will be provided with ART (Anti- Retroviral Therapy) irrespective of his CD count.

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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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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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In general, liver is a good source of vitamin A, iron, zinc, copper and manganese, and a very good source of protein. There are twenty grams of protein in a single slice of liver.

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Vitamin K refers to a group of fat-soluble vitamins that play a role in blood clotting, bone metabolism, and regulating blood calcium levels. The body needs vitamin K to produce prothrombin, a protein and clotting factor that is important in blood clotting and bone metabolism.

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Sarpagandha plant is used to treat blood pressure. It’s one of the major source of resperine. The powder derived from Sarpagandha roots is an excellent natural remedy for treating hypertension. Sarpagandha lowers blood pressure and improves blood circulation by dilating the blood vessels and controlling nerve function in the muscles that lead to the heart.

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Amino acids are the molecular building blocks of proteins. So proteins are synthesized from them. Essential amino acids are histidine, isoleucine, leucine, methionine, phenylalanine, threonine, tryptophan, valine, lysine.

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Medulla Oblongata is that part of the brain which regulates basic functions. It regulates vomiting, hiccupping, swallowing, coughing, sneezing, etc.

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Scurvy also once called ‘Sailor’s disease’ is a condition where an individual has a vitamin C (ascorbic acid) deficiency. Scurvy often presents itself initially as symptoms of malaise and lethargy, followed by formation of spots on the skin, spongy gums, and bleeding from the mucous membranes. Spots are most abundant on the thighs and legs, and a person with the ailment looks pale, feels depressed, and is partially immobilized. As scurvy advances, there can be open, suppurating wounds, loss of teeth, jaundice, fever, neuropathy and death.

Notes:
Vitamin C, also known as ascorbic acid, is a water-soluble vitamin. No animal food contain Vitamin C. It being not being fat soluble cannot be stored but a person rely on its supply on daily diet on foods rich in citric or ascorbic acid.