Feedback Science Fair Project Ideas Below is a list of great ideas for potential science fair projects. Pick something you're interested in and try it out for size. The projects are categorized by their difficulty.
The undreamt-of breakthrough of molecular biology has made the problem of the origin of life a greater riddle than it was before: If life arises from nonliving chemicals, there must be intermediate forms, "precellular life.
RNA has the ability to act as both Problem and hypothesis and enzymes. This property could offer a way around the "chicken-and-egg" problem. Genes require enzymes; enzymes require Problem and hypothesis. These facts are reasons to consider that the RNA world could be the original pathway to cells.
James Watson enthusiastically praises Sir Francis Crick for having suggested this possibility 1: It was prescient of Crick to guess that RNA could act as an enzyme, because that was not known for sure until it was proven in the s by Nobel prize-winning researcher Thomas R.
Cech 2 and others. The discovery of RNA enzymes launched a round of new theorizing that is still under way. The first stage of evolution proceeds, then, by RNA molecules performing the catalytic activities necessary to assemble themselves from a nucleotide soup.
The RNA molecules evolve in self-replicating patterns, using recombination and mutation to explore new niches. This process would make the first proteins, which would simply be better enzymes than their RNA counterparts.
These protein enzymes are Cech Today, research in the RNA world is a medium-sized industry. Scientists in this field are able to demonstrate that random sequences of RNA sometimes exhibit useful properties.
The results are interesting — they suggest that randomness can produce functionality. The authors interpret the results to mean that "the number of distinct complex functional RNA structures is very large indeed. But these and other similar findings, arrived at in highly orchestrated experiments that start with biologically produced RNA, are very far from proving that the RNA world is the pathway between nonlife and life.
In nature, far from the sterilized laboratory, uncontaminated RNA strands of any size would be unlikely to form in the first place. The direct synthesis of Inhe and another eminent researcher into the origin of life, Leslie E. Orgel, published a paper advocating the theory called "Directed Panspermia" 6.
InCrick published Life Itself, a whole book about that theory 7. And by he says, "It may turn out that we will eventually be able to see how this RNA world got started. At present, the gap from the primal 'soup' to the first RNA system capable of natural selection looks forbiddingly wide" 8.
At the Salk Institute for Biological Studies, inLeslie Orgel observes, "Because synthesizing nucleotides and achieving replication of RNA under plausible prebiotic conditions have proved so challenging, chemists are increasingly considering the possibility that RNA was not the first self replicating molecule In the Final Report issued after the "Astrobiology Workshop" held Septemberat Ames Research Center, California, we read 10It has been postulated that there was a time in protobiological evolution when RNA played a dual role as both genetic material and a catalytic molecule "the RNA world".
However, this appealing concept encounters significant difficulties. RNA is chemically fragile and difficult to synthesize abiotically. The known range of its catalytic activities is rather narrow, and the origin of an RNA synthetic apparatus is unclear. Other Theories In spite of the intense level of work on the RNA world in the last decade, there is no consensus theory for precellular life.
There are many theories. Here are some of the others — A few scientists still say that DNA could succeed in starting life on its way But even the shortest DNA strand needs proteins to help it replicate.
This is the chicken-and-egg problem.An investigation is a project where the problem, or answer to a question, is solved. When undertaking an investigation, a method is followed that allows for the testing of an idea, or finding a solution to a problem, which determines a clear conclusion to the problem or question asked.
An IEP team's introduction to functional behavioral assessment and behavior intervention plans.
The object of the IDEA is not to arbitrarily mandate change, but to provide an environment conducive to the education of all students, including those with disabilities. In its most basic form, the thought process in the scientific method can consists of the following tasks: Identifying a Problem; Forming a hypothesis.
Inventing Homemade Instruments with Math and Measurement. Welcome to Phil and Sarah's page on making homemade musical instruments — where common household items are transformed into musical marvels using math and measurement!
The undreamt-of breakthrough of molecular biology has made the problem of the origin of life a greater riddle than it was before: we have acquired new and deeper problems. Since , when the shy German mathematician Bernhard Riemann wrote an eight-page article giving a possible answer to a problem that had tormented mathematical minds for centuries, the world's greatest mathematicians have been fascinated, infuriated, and obsessed with proving the Riemann hypothesis.