macronucleus

简明释义

英[ˌmækrəʊˈnjuːklɪəs]美[ˌmækroʊˈnuːkliəs]

n. 滋养核，[无脊椎] 大核

复 数 m a c r o n u c l e i 或 m a c r o n u c l e u s e s

英英释义

单词用法

同义词

反义词

例句

1.The other protein reacts with anti-lamin B antibody and is situated in the macronucleus.

另一种蛋白质与抗 laminB抗体反应，位于滋养核中。

2.The other protein reacts with anti-lamin B antibody and is situated in the macronucleus.

另一种蛋白质与抗 laminB抗体反应，位于滋养核中。

3.In many protists, the macronucleus plays a crucial role in gene expression.

在许多原生生物中，大核在基因表达中起着至关重要的作用。

4.During the life cycle of certain ciliates, the macronucleus is formed and destroyed multiple times.

在某些纤毛虫的生命周期中，大核会被形成和破坏多次。

5.The function of the macronucleus can differ greatly between species.

不同物种之间，大核的功能可能有很大差异。

6.Researchers observed that the macronucleus undergoes significant changes during cell division.

研究人员观察到，大核在细胞分裂过程中经历显著变化。

7.The presence of a large macronucleus in the cell indicates that it is involved in complex cellular processes.

细胞中存在一个大的大核表明它参与复杂的细胞过程。

作文

The study of cellular biology reveals a fascinating world where various cellular components play crucial roles in the life of an organism. One such component is the macronucleus, which is a prominent feature in certain protozoa, particularly in ciliates. The macronucleus is responsible for controlling the non-reproductive cell functions, including metabolism and growth. Unlike the micronucleus, which is involved in reproduction, the macronucleus handles the everyday tasks that keep the organism alive and functioning. This distinction between the two types of nuclei highlights the complexity of cellular organization in these organisms.In ciliates, the macronucleus is typically larger than the micronucleus and contains multiple copies of the organism's DNA. This polyploid nature allows for the rapid transcription of genes, which is essential for the high metabolic demands of these single-celled organisms. The presence of a macronucleus enables ciliates to adapt quickly to environmental changes, as they can swiftly produce the proteins necessary for survival in varying conditions.The formation of the macronucleus occurs during the process of conjugation, a form of sexual reproduction in ciliates. During this process, two cells exchange genetic material, leading to the reorganization of the genetic content and the formation of a new macronucleus. This unique reproductive strategy not only promotes genetic diversity but also ensures that the newly formed macronucleus is well-equipped to manage the cellular functions of the next generation of ciliates.Research into the macronucleus has provided valuable insights into the evolutionary adaptations of eukaryotic cells. The existence of two distinct nuclei within a single cell challenges traditional notions of cellular organization and function. Scientists are intrigued by how the macronucleus can regulate gene expression so efficiently while coexisting with the micronucleus, which serves a different purpose altogether.Moreover, the study of the macronucleus has implications beyond basic biology. Understanding how this organelle functions can lead to advances in biotechnology and medicine. For example, the mechanisms of gene regulation in the macronucleus could inspire novel approaches to genetic engineering and therapeutic interventions. As researchers continue to investigate the complexities of the macronucleus, we may uncover new strategies for combating diseases or enhancing agricultural productivity.In conclusion, the macronucleus is a remarkable organelle that exemplifies the intricacies of cellular life. Its role in managing essential cellular functions, coupled with its unique evolutionary history, makes it a subject of great interest in biological research. By studying the macronucleus, scientists can gain a deeper understanding of not only ciliates but also the fundamental principles of eukaryotic cell biology. As we delve further into the mysteries of the macronucleus, we open doors to innovative solutions that could benefit various fields, from healthcare to environmental science.

细胞生物学的研究揭示了一个迷人的世界，在这个世界中，各种细胞成分在生物体的生活中扮演着至关重要的角色。其中一个成分是大核，这是某些原生动物，特别是纤毛虫中的一个显著特征。大核负责控制非生殖性细胞功能，包括代谢和生长。与参与生殖的微核不同，大核处理维持生物体生存和功能所需的日常任务。这两种类型的细胞核之间的这种区别突显了这些生物体内细胞组织的复杂性。在纤毛虫中，大核通常比微核大，并且包含多个拷贝的生物体DNA。这种多倍体特性允许快速转录基因，这对这些单细胞生物高代谢需求至关重要。大核的存在使纤毛虫能够快速适应环境变化，因为它们可以迅速生产生存所需的蛋白质，以应对不同的条件。大核的形成发生在结合过程期间，这是一种纤毛虫的有性繁殖形式。在这个过程中，两个细胞交换遗传物质，导致遗传内容的重组和新的大核的形成。这种独特的繁殖策略不仅促进了遗传多样性，还确保新形成的大核能够有效管理下一代纤毛虫的细胞功能。对大核的研究为了解真核细胞的进化适应提供了宝贵的见解。在单个细胞内存在两种不同的细胞核挑战了传统的细胞组织和功能观念。科学家们对大核如何能够如此高效地调节基因表达，同时与具有完全不同目的的微核共存感到好奇。此外，大核的研究超越了基础生物学。理解这个细胞器的功能可以推动生物技术和医学的进步。例如，大核中的基因调控机制可能会激发新的基因工程和治疗干预的方法。随着研究人员继续调查大核的复杂性，我们可能会发现新的对抗疾病或提高农业生产力的策略。总之，大核是一个非凡的细胞器，体现了细胞生命的复杂性。它在管理基本细胞功能方面的作用，加上其独特的进化历史，使其成为生物研究的重大兴趣对象。通过研究大核，科学家可以更深入地理解不仅是纤毛虫，还有真核细胞生物学的基本原则。当我们进一步探究大核的奥秘时，我们为各种领域的创新解决方案打开了大门，从医疗保健到环境科学。