plasmid

简明释义

英[ˈplæzmɪd]美[ˈplæzmɪd]

n. [遗] 质粒；质体

英英释义

单词用法

同义词

反义词

例句

1.Now how do you find those colonies on a plate that have the plasmid that you want?

那现在你如何辨别盘子上有我们需要的质粒的菌落呢？

2.Objective To construct a recombinant plasmid for expression of rabies virus glycoprotein in COS-7 cells.

目的构建狂犬病病毒糖蛋白基因的真核细胞表达载体，并在COS - 7细胞中表达。

3.Used restrict enzyme and PCR to verify the reconstructed plasmid.

用酶切和PCR的方法对重组质粒进行鉴定。

4.Objective To explore a procedure for preparation of plasmid DNA for gene therapy.

目的探索基因治疗用质粒DNA的制备工艺。

5.The recombinant plasmid was transformed into E.

用化学法把重组质粒转化到E 。

6.In this review, we summarize the current progresses on plasmid biology in the rare actinomycetes.

本文综述目前稀有放线菌中的质粒生物学的研究进展。

7.A plasmid is a small circular DNA molecule that is separate from chromosomal DNA.

质粒是一种小的环状DNA分子，与染色体DNA分开。

8.Researchers often use a plasmid to clone genes in the laboratory.

研究人员通常使用质粒在实验室中克隆基因。

9.The plasmid can carry antibiotic resistance genes, which can be transferred between bacteria.

该质粒可以携带抗生素抗性基因，这些基因可以在细菌之间转移。

10.Gene therapy often involves the use of a plasmid to deliver therapeutic genes into cells.

基因治疗通常涉及使用质粒将治疗基因传递到细胞中。

11.Scientists introduced a new plasmid into the bacterial culture to enhance protein production.

科学家向细菌培养物中引入了一个新的质粒以增强蛋白质生产。

作文

Plasmids are small, circular, double-stranded DNA molecules that are distinct from a cell's chromosomal DNA. They are primarily found in bacteria, but can also be present in archaea and some eukaryotic organisms. One of the most fascinating aspects of plasmids (质粒) is their ability to replicate independently of the host cell's chromosomal DNA. This unique characteristic allows them to carry genes that can provide advantageous traits to the host organism, such as antibiotic resistance or the ability to metabolize unusual substances. In the field of molecular biology, plasmids (质粒) have become invaluable tools for genetic engineering and biotechnology. Scientists can insert specific genes into plasmids (质粒) to create recombinant DNA, which can then be introduced into bacterial cells. This process allows researchers to produce large quantities of proteins, including enzymes and hormones, that are essential for various medical and industrial applications. For example, insulin used to treat diabetes is often produced using genetically modified bacteria containing human insulin genes inserted into plasmids (质粒). Moreover, plasmids (质粒) play a crucial role in horizontal gene transfer, a process where genetic material is exchanged between organisms. This mechanism contributes to the rapid spread of antibiotic resistance among bacterial populations. When a bacterium acquires a plasmid (质粒) carrying resistance genes, it can survive in the presence of antibiotics, making it a significant concern for public health. Understanding how plasmids (质粒) function and how they can be manipulated is essential in combating antibiotic resistance and developing new treatment strategies. Furthermore, plasmids (质粒) are not limited to bacteria; they can also be found in yeast and plant cells. Researchers are exploring the use of plant plasmids (质粒) to develop genetically modified crops that can withstand harsh environmental conditions or pests. By transferring beneficial genes into plant plasmids (质粒), scientists aim to enhance crop yields and reduce the need for chemical pesticides. This approach could lead to more sustainable agricultural practices and food security in the future. In conclusion, plasmids (质粒) are remarkable genetic elements that have significantly impacted the fields of genetics, medicine, and agriculture. Their ability to replicate independently, carry beneficial genes, and facilitate genetic engineering makes them essential tools in modern science. As research continues to uncover the potential of plasmids (质粒), we can expect further advancements in biotechnology that will benefit society in numerous ways. Understanding and harnessing the power of plasmids (质粒) is crucial for addressing some of the most pressing challenges we face today, from antibiotic resistance to food security.

质粒是小型、环状、双链DNA分子，与细胞的染色体DNA不同。它们主要存在于细菌中，但在古菌和一些真核生物中也可以发现。质粒的一个最迷人的方面是它们能够独立于宿主细胞的染色体DNA进行复制。这一独特特性使它们能够携带提供有利特征的基因，例如抗生素抗性或代谢不寻常物质的能力。在分子生物学领域，质粒已成为基因工程和生物技术中不可或缺的工具。科学家可以将特定基因插入质粒中，以创建重组DNA，然后将其引入细菌细胞中。这一过程使研究人员能够生产大量的蛋白质，包括在各种医学和工业应用中必需的酶和激素。例如，用于治疗糖尿病的胰岛素通常是通过使用含有人胰岛素基因的转基因细菌来生产的，这些基因被插入到质粒中。此外，质粒在水平基因转移中起着至关重要的作用，这一过程涉及生物体之间的遗传物质交换。这一机制促进了抗生素抗性在细菌群体中的快速传播。当细菌获得携带抗性基因的质粒时，它就能在抗生素存在的情况下生存，这对公共健康构成了重大威胁。理解质粒的功能及其如何被操控，对于应对抗生素抗性和开发新的治疗策略至关重要。此外，质粒不仅限于细菌；它们也可以在酵母和植物细胞中找到。研究人员正在探索利用植物质粒开发能够抵御恶劣环境条件或害虫的转基因作物。通过将有益基因转移到植物质粒中，科学家旨在提高作物产量并减少对化学农药的需求。这种方法可能会导致更可持续的农业实践和未来的粮食安全。总之，质粒是显著的遗传元素，对遗传学、医学和农业领域产生了重大影响。它们独立复制、携带有益基因和促进基因工程的能力，使它们成为现代科学中不可或缺的工具。随着研究继续揭示质粒的潜力，我们可以期待生物技术的进一步进展，将在许多方面造福社会。理解和利用质粒的力量对于解决我们今天面临的一些最紧迫的挑战至关重要，从抗生素抗性到粮食安全。