Sunlight stimulate the plant movement is called? ?->(Show Answer!)

1. Sunlight stimulate the plant movement is called?

Answer: Heliotropism

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MCQ-> Read the following passage carefully and answer the questions given below it. Certain words are printed in bold to help you to locate them while answering some of the questions.Long ago, the country of Gandhara was ruled by a just and good king Vidyadhara. His subjects were very happy, but as the king grew older, everyone grew more and more worried because the king did not have any children who could take over the kingdom after him. The king was an avid gardener. He spent a lot of time tending to his garden. planting the finest flowers. fruit trees and vegetables. One day. after he finished working in his garden, he proclaimed, ‘I will distribute some seeds to all the children in the kingdom. The one who grows the biggest, healthiest plant within three months will become the price or the princess'. The next day there was a long queue of anxious parents and children outside the palace. Everyone was eager to get a seed arid grow the best plant. Pingala, a poor farmer’s son. was among the children. Like the king, he too was fond of gardening and grew beautiful plants in his backyard. He took the seed from the king and planted it in a pot with great care. Some weeks passed and he plied it with water and manure. but the plant did not appear. Pingala tried changing the soil and transferred the seed to another pot, but even by the end of three months nothing appeared. At last the day came when all the children had to go to the king to show the plant they had grown. They went walking to the palace dressed in their best, holding beautiful plants in their hands. Only Pingala stood sadly, watching them go by. Pingala’s father had watched his son working hard with the seed and lelt sorry for him. ‘Why don’t you go to the king with your empty pot ?’ he suggested. At least he will know you tried your best So Pingala too wore his best suit and joined the others outside the palace, holding his empty pot in his hand and ignoring the laughter around him. Soon the king arrived and began his inspection, The pots held flowers of different shades, beautiful and healthy. but the king did not look happy. At the end of the queue stood Pingala, and when the king reached him, he stopped in surprise. ‘My son, why have you come with an empty pot ? Could you not grow anything? Pingala looked down and said, ‘Forgive me, your highness. I tried my best, I gave it the best soil and manure I had, but the plant would not grow.’ Now the king’s face broke into a smile. He enveloped Pingala in his arms and announced, 'This boy truly deserves to be crowned the prince! I had given everyone roasted seeds, which would never grow. I wanted to see which child was the most honest one, and would admit he or she would not be able to grow anything. Only this young boy told the truth. I am sure he will rule this kingdom one day with truth and honesty'. And indeed that was what happened. When the king grew old and died. Pingala, who had learnt everything from him, came to the throne and ruled Gandhara justly for many years.Why did the king distribute seeds to all the children in his kingdom ?
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MCQ->Three Vice Presidents (VP) regularly visit the plant on different days. Due to labour unrest, VP (HR) regularly visits the plant after a gap of 2 days. VP (Operations) regularly visits the plant after a gap of 3 days. VP (Sales) regularly visits the plant after a gap of 5 days. The VPs do not deviate from their individual schedules. CEO of the company meets the VPs when all the three VPs come to the plant together. CEO is one leave from January 5 th to January 28 th , 2012. Last time CEO met the VPs on January 3, 2012. When is the next time CEO will meet all the VPs ?...

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 regarding 'Project Sunlight': 1. Union Minister of Health and Family Welfare JP Nadda has launched the Project Sunlight. The project is for the prevention of AIDS in the Northeast. The Project is funded by the Centre for Disease Control of the United States. It will be implemented by the Family Health India (FHI)-360 under the supervision of the National AIDS Control Organization (NACO). Which of the above statements are correct?...