nucleoli

简明释义

英[ˌnjuːklɪˈəʊlaɪ]美["ˈnuːkliˌoʊli]

n. 核仁（nucleolus 的复数）

英英释义

单词用法

同义词

反义词

例句

1.At ellipsoidal embryo stage, the chromatin and nucleoli disappear and some cytoplasm enters the nucleus.

在椭形胚期，宿存助细胞核内的染色质及核仁消失，有细胞质侵入核内。

2.The WBC's seen here are lymphocytes, but they are blasts — very immature cells with larger nuclei that contain nucleoli.

白血病可见白细胞是淋巴细胞，但它们是母细胞——核中含有核仁的、更大的、非常不成熟的细胞。

3.This is the so-called "nucleolar pattern" of staining in which the bright fluorescence is seen within the nucleoli of the Hep2 cells. This pattern is more suggestive of progressive systemic sclerosis.

图示核仁型，在HEP2细胞核仁中，可见明亮的荧光。此型进一步提示进行性系统性硬化病。

4.Nucleoli (one or two per nucleus) are stained blue with hematoxylin.

一两个核仁被苏木精染成蓝色。

5.There were occasional enlarged hyperchromatic nuclei with one or more prominent nucleoli .

偶尔也可见到增大深染的具有一个或多个显著核仁的细胞核。

6.The most characteristic component is the Aschoff giant cell. Several appear here as large cells with two or more nuclei that have prominent nucleoli.

它组成成份是风湿细胞，体积大，可有双核或多核（核仁很明显）。

7.In the cell, the nucleoli 核仁 are responsible for producing ribosomes.

在细胞中，核仁 nucleoli 负责生成核糖体。

8.The number of nucleoli 核仁 can vary depending on the cell type.

不同类型的细胞中，核仁 nucleoli 的数量可能会有所不同。

9.During cell division, the nucleoli 核仁 disassemble and reassemble in the daughter cells.

在细胞分裂过程中，核仁 nucleoli 解体并在子细胞中重新组装。

10.Researchers study nucleoli 核仁 to understand their role in gene expression.

研究人员研究 核仁 nucleoli 以了解它们在基因表达中的作用。

11.Enlarged nucleoli 核仁 can be a sign of cancerous activity in cells.

增大的 核仁 nucleoli 可能是细胞癌变活动的迹象。

作文

The cell is often regarded as the basic unit of life, and within each cell, there are numerous structures that perform various functions. One of the most important structures found in eukaryotic cells is the nucleus, which houses the genetic material of the organism. Within the nucleus, there are several components, including the nucleolus, which plays a crucial role in the production of ribosomes. The term nucleoli refers to the plural form of nucleolus, indicating that there can be multiple nucleoli present in a single nucleus depending on the cell's activity and type. The primary function of the nucleoli is to synthesize ribosomal RNA (rRNA) and assemble it with proteins to form ribosomal subunits. These subunits are essential for protein synthesis, which is vital for cell growth and function. The presence of nucleoli is particularly prominent in cells that are actively producing proteins, such as those in the liver or muscle tissues. The size and number of nucleoli can vary significantly based on the metabolic activity of the cell. For example, during periods of intense growth or stress, cells may increase the number of nucleoli to meet the heightened demand for protein production. In addition to their role in ribosome biogenesis, nucleoli are also involved in other cellular processes, such as the regulation of the cell cycle and stress responses. They serve as hubs for the assembly of various proteins and RNA molecules, facilitating communication and coordination within the cell. Interestingly, the structure of nucleoli is dynamic; they can change in size and shape in response to different cellular conditions, reflecting the cell's functional state. Research has shown that abnormalities in nucleoli can be indicative of certain diseases, including cancer. In many cancer cells, for instance, the nucleoli are often larger and more numerous than in healthy cells, suggesting an increased rate of protein synthesis associated with uncontrolled cell proliferation. This has led scientists to investigate the potential of targeting nucleoli in cancer therapy, as they may present unique vulnerabilities that could be exploited to inhibit tumor growth. Furthermore, the study of nucleoli extends beyond human biology; they are also present in a wide range of organisms, from plants to animals. This universality highlights the fundamental importance of nucleoli in cellular function across different life forms. By understanding how nucleoli operate and their role in health and disease, researchers can gain insights into fundamental biological processes and potentially develop new therapeutic strategies. In conclusion, nucleoli are essential components of eukaryotic cells, playing a critical role in ribosome production and overall cellular function. Their dynamic nature and involvement in various cellular processes make them a fascinating subject of study. As we continue to explore the intricacies of cell biology, the nucleoli will undoubtedly remain a key focus, offering valuable information about the mechanisms that underpin life itself.

细胞通常被视为生命的基本单位，而在每个细胞内，有许多结构执行各种功能。其中一个在真核细胞中发现的重要结构是细胞核，它包含了生物体的遗传物质。在细胞核内，有几个组成部分，包括核仁，它在核糖体的生产中发挥着至关重要的作用。术语nucleoli指的是核仁的复数形式，表明在单个细胞核中可以存在多个核仁，具体取决于细胞的活动和类型。 nucleoli的主要功能是合成核糖体RNA（rRNA）并将其与蛋白质组装成核糖体亚基。这些亚基对蛋白质合成至关重要，这对细胞的生长和功能至关重要。活跃产生蛋白质的细胞，例如肝脏或肌肉组织中的细胞，尤其明显地存在nucleoli。根据细胞的代谢活动，nucleoli的大小和数量可能会显著变化。例如，在强烈生长或压力期间，细胞可能会增加nucleoli的数量，以满足对蛋白质生产的更高需求。 除了在核糖体生物合成中的作用外，nucleoli还参与其他细胞过程，如细胞周期的调节和应激反应。它们作为各种蛋白质和RNA分子的组装中心，促进细胞内的通信与协调。有趣的是，nucleoli的结构是动态的；它们可以根据不同的细胞条件在大小和形状上发生变化，反映细胞的功能状态。 研究表明，nucleoli的异常可能表明某些疾病，包括癌症。例如，在许多癌细胞中，nucleoli通常比健康细胞更大且数量更多，这表明与失控细胞增殖相关的蛋白质合成速率增加。这促使科学家们调查针对癌症治疗中nucleoli的潜力，因为它们可能呈现出独特的脆弱性，可以利用这种脆弱性来抑制肿瘤生长。 此外，nucleoli的研究不仅限于人类生物学；它们在从植物到动物的广泛生物体中也存在。这种普遍性突显了nucleoli在不同生命形式的细胞功能中的根本重要性。通过理解nucleoli如何运作及其在健康和疾病中的作用，研究人员可以深入了解基本的生物过程，并可能开发新的治疗策略。 总之，nucleoli是真核细胞的重要组成部分，在核糖体生产和整体细胞功能中发挥着关键作用。它们的动态特性及其在各种细胞过程中的参与使其成为一个引人入胜的研究对象。随着我们继续探索细胞生物学的复杂性，nucleoli无疑将成为一个关键焦点，为我们提供关于支撑生命本身机制的宝贵信息。