04/12/2020

代写论文:《RNA世界假说》

代写论文:《RNA世界假说》。《RNA世界假说》简单地提出了一个观点,即自我复制的RNA是生命开始在这个星球上存在的原因。这些细胞最终进化成现在生命形式中发现的细胞。整个RNA分子系统可以编码氨基酸块,产生肽键,这意味着生命的形成和遗传系统的发展有可能由此产生,在没有DNA的情况下。RNA中的核酶进一步证明了这些颗粒是最初负责传递遗传特征和确定DNA年代的。研究人员寻找生命起源的另一种可能性,RNA发挥主要作用,作为传递遗传信息的基础,因为它们也催化自己的复制与核酶的帮助。接下来代写论文专家将为同学们分享下《RNA世界假说》

RNA被认为是导致生命形成的主要元素,更容易理解和解释。另一方面,DNA不能被认为是碱基,因为它不能复制自己并催化反应,但它还需要额外单位的DNA聚合酶和RNA引物来进行复制(Huber & Wachtershauser, 1998)。

应该提到的是,RNA分子在概念上可以经历分子进化,就像正常进化一样。然后自然选择就会出现,并在RNA复制的过程中发挥作用,集中于它们在生物进化中的主要功能。复制会继续下去,会有修改和突变,产生变异,这反过来不仅增加了种群,而且增加了种群数量的频率。当RNA被当作生命形成的基本单位时,这就是结果。

因此有许多理论,每一个都涉及共同和普遍祖先的概念,重视DNA,作为遗传信息的单位,比RNA更稳定。DNA中的互补链是复制的模板,具有遗传信息和性状,这表明它是一个优势系统,因为它有选择性条纹(Martin, Baross和Russell, 2008)。尽管如此,核酶仍然通过阅读RNA中包含的遗传信息来处理细胞中的信息,从而合成蛋白质。据说细胞内的催化活性如氨基酸与肽键的结合等都是由它完成的。由于这具有普遍的性质,可以说它可能已经在普遍的共同祖先中表现出来,并且在地球上现存的物种中仍然存在。

RNA was considered to be the main element which led to formation of life, was easier to understand and explain. DNA on the other hand could not be considered to be the base, because not could it replicate itself and catalyse the reaction but that it also needed additional units of DNA polymerases and RNA primers for replication (Huber & Wachtershauser, 1998).

It should be mentioned that RNA molecules conceptually could go through a molecular evolution, like normal evolution. Then the natural selection would come in and would play a role when the copies were being made by the RNA, concentrating on their main function of biological evolution. The replications would go on, there would be modifications and mutations, giving rise to variants, which would in turn not only increase the population, but also is the frequency at which it was getting populated. This would be the result when RNA was taken to be the base unit of formation of life.

There are a number of theories thus, and each refers to the common and universal ancestor concept, giving importance to DNA, as units of genetic information and being more stable than RNA. Complementary strands in DNA are templates for replication, having genetic information and traits, which showing that it is an advantageous system because it had a selective streak (Martin, Baross and Russell, 2008). Nevertheless, ribozymes still process the information in the cell leading to synthesizing the proteins by reading the information on genetics contained in the RNA. It is said that the catalytic activities within a cell like binding of the amino acids with the peptide bonds and so on are done by it. Since this has a nature of being universal, it can be said that it could have been presented in the universal common ancestors and it is still found in the living species on Earth.

以上内容就是《RNA世界假说》的分享,希望能给同学们带来帮助!如果同学们在撰写研究论文时需要更多的帮助,请随时在线咨询美国论文代写服务或发送电子邮件联系我们。美国论文代写帮助专家可以24×7全天候为您提供帮助,除此之外,还有同学们提供paper代写、essay代写、report代写等论文服务,而且代写论文价格公平合理,保证论文原创,并使用权威的抄袭检测系统,让同学们松应对论文写作并创作出专属个人的优秀论文!

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