The protective inflammatory & immune process in response to plaque biofilm , resulting in tissue damage of the host is termed as ? ?->(Show Answer!)

1. The protective inflammatory & immune process in response to plaque biofilm , resulting in tissue damage of the host is termed as ?

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MCQ->The protective inflammatory & immune process in response to plaque biofilm , resulting in tissue damage of the host is termed as ?....

MCQ-> Read the following passage carefully and answer the given questions.There is no field of human endeavour that has been so misunderstood as health, while health which connotes well-being and the absence of illness has a low profile; it is illness representing the failure of health which virtually monopolizes attention because of the fear of pain, disability and death. Even Sushruta has warned that this provides the medical practitioner power over the patient which could be misused. Till recently, patients had implicit faith in their physician that they loved and respected, not only for his knowledge but also in the total belief that practitioners of this noble profession, guided by ethics, always place the patient’s interest above all other considerations. This rich interpersonal relationship between the physician; patient and family has barred a few expectations prevailedtill the recent past, for caring was considered as important as curing. Our indigenous system of medicine like ayurveda and yoga have been more concerned with the promotion of the health of both the body and mind and with maintaining a harmonious relationship not just with fellow being but with nature itself, of which man is an integral part. Health practices like cleanliness proper diet exercise and meditation are part of our culture which sustains people in the prevailing conditions of poverty in rural India and in the unhygienic urban slums. These systems consider disease as an aberration resulting from disturbance of the equilibrium of health which must be corrected by gentle restoration of this balance through proper diet, medicines and the establishment of mental peace. They also teach the graceful acceptance of old age with its infirmities resulting from the normal degenerative process as well as if death which is inevitable. This is in marked contrast to the western concept of life as a constant struggle against disease aging and death which must be fought and conquered with the knowledge and technology derived from their science; a science which with its narrow dissective and quantifying approach has provided us the understanding of the microbial causes of the communicable disease and provided highly effective technology for their prevention, treatment and control. This can rightly be claimed as the greatest contribution of western medicine and justifiably termed as ‘high technology. And yet the contribution of this science in the field of noncommunicable disease is remarkably poor despite the far greater inputs in research and treatment for the problem of aging like cancer, heart disesase, paralytic strokes and arthritis which are the major problems of affluent societies today.Which of the following has been described as the most outstanding benefit of modern medicine ? (A) The real course and ways of control of communicable diseases. (B) Evolution of the concept of harmony between man and nature. (C) Special techniques for fighting aging.....

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MCQ-> Cells are the ultimate multi-taskers: they can switch on genes and carry out their orders, talk to each other, divide in two, and much more, all at the same time. But they couldn’t do any of these tricks without a power source to generate movement. The inside of a cell bustles with more traffic than Delhi roads, and, like all vehicles, the cell’s moving parts need engines. Physicists and biologists have looked ‘under the hood’ of the cell and laid out the nuts and bolts of molecular engines.The ability of such engines to convert chemical energy into motion is the envy nanotechnology researchers looking for ways to power molecule-sized devices. Medical researchers also want to understand how these engines work. Because these molecules are essential for cell division, scientists hope to shut down the rampant growth of cancer cells by deactivating certain motors. Improving motor-driven transport in nerve cells may also be helpful for treating diseases such as Alzheimer’s, Parkinson’s or ALS, also known as Lou Gehrig’s disease.We wouldn’t make it far in life without motor proteins. Our muscles wouldn’t contract. We couldn’t grow, because the growth process requires cells to duplicate their machinery and pull the copies apart. And our genes would be silent without the services of messenger RNA, which carries genetic instructions over to the cell’s protein-making factories. The movements that make these cellular activities possible occur along a complex network of threadlike fibers, or polymers, along which bundles of molecules travel like trams. The engines that power the cell’s freight are three families of proteins, called myosin, kinesin and dynein. For fuel, these proteins burn molecules of ATP, which cells make when they break down the carbohydrates and fats from the foods we eat. The energy from burning ATP causes changes in the proteins’ shape that allow them to heave themselves along the polymer track. The results are impressive: In one second, these molecules can travel between 50 and 100 times their own diameter. If a car with a five-foot-wide engine were as efficient, it would travel 170 to 340 kilometres per hour.Ronald Vale, a researcher at the Howard Hughes Medical Institute and the University of California at San Francisco, and Ronald Milligan of the Scripps Research Institute have realized a long-awaited goal by reconstructing the process by which myosin and kinesin move, almost down to the atom. The dynein motor, on the other hand, is still poorly understood. Myosin molecules, best known for their role in muscle contraction, form chains that lie between filaments of another protein called actin. Each myosin molecule has a tiny head that pokes out from the chain like oars from a canoe. Just as rowers propel their boat by stroking their oars through the water, the myosin molecules stick their heads into the actin and hoist themselves forward along the filament. While myosin moves along in short strokes, its cousin kinesin walks steadily along a different type of filament called a microtubule. Instead of using a projecting head as a lever, kinesin walks on two ‘legs’. Based on these differences, researchers used to think that myosin and kinesin were virtually unrelated. But newly discovered similarities in the motors’ ATP-processing machinery now suggest that they share a common ancestor — molecule. At this point, scientists can only speculate as to what type of primitive cell-like structure this ancestor occupied as it learned to burn ATP and use the energy to change shape. “We’ll never really know, because we can’t dig up the remains of ancient proteins, but that was probably a big evolutionary leap,” says Vale.On a slightly larger scale, loner cells like sperm or infectious bacteria are prime movers that resolutely push their way through to other cells. As L. Mahadevan and Paul Matsudaira of the Massachusetts Institute of Technology explain, the engines in this case are springs or ratchets that are clusters of molecules, rather than single proteins like myosin and kinesin. Researchers don’t yet fully understand these engines’ fueling process or the details of how they move, but the result is a force to be reckoned with. For example, one such engine is a spring-like stalk connecting a single-celled organism called a vorticellid to the leaf fragment it calls home. When exposed to calcium, the spring contracts, yanking the vorticellid down at speeds approaching three inches (eight centimetres) per second.Springs like this are coiled bundles of filaments that expand or contract in response to chemical cues. A wave of positively charged calcium ions, for example, neutralizes the negative charges that keep the filaments extended. Some sperm use spring-like engines made of actin filaments to shoot out a barb that penetrates the layers that surround an egg. And certain viruses use a similar apparatus to shoot their DNA into the host’s cell. Ratchets are also useful for moving whole cells, including some other sperm and pathogens. These engines are filaments that simply grow at one end, attracting chemical building blocks from nearby. Because the other end is anchored in place, the growing end pushes against any barrier that gets in its way.Both springs and ratchets are made up of small units that each move just slightly, but collectively produce a powerful movement. Ultimately, Mahadevan and Matsudaira hope to better understand just how these particles create an effect that seems to be so much more than the sum of its parts. Might such an understanding provide inspiration for ways to power artificial nano-sized devices in the future? “The short answer is absolutely,” says Mahadevan. “Biology has had a lot more time to evolve enormous richness in design for different organisms. Hopefully, studying these structures will not only improve our understanding of the biological world, it will also enable us to copy them, take apart their components and recreate them for other purpose.”According to the author, research on the power source of movement in cells can contribute to
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MCQ->Consider the following statements in regard to aerobic and anaerobic treatment processes :1. Biomass production in the aerobic treatment process is more as compared to the anaerobic treatment process.2. Start-up period is more in the aerobic treatment process as compared to the anaerobic treatment process.3. Energy consumption and production is more in the aerobic treatment process as compared to the anaerobic treatment process.Which of the statements given above is/are correct ?....