n.核仁

原形：nucleolus复数：nucleoli

The nucleolus is a prominent structure within the nucleus of eukaryotic cells.
核仁是真核细胞核内一个显著的结构。
In prokaryotes, there is no distinct nucleolus as they lack a true nucleus.
在原核生物中，由于没有真正的细胞核，因此也没有明显的核仁。
Ribosomal RNA synthesis occurs in the nucleolus before ribosomes are assembled.
核糖体RNA的合成首先在核仁中进行，然后组装成核糖体。
During interphase, the nucleolus is clearly visible under a light microscope.
在细胞分裂间期，利用光学显微镜可以清晰地观察到核仁。
Certain diseases and mutations can lead to an abnormal size or number of nucleoli in the cell.
某些疾病和突变可能导致细胞中核仁的数量或大小异常。
The nucleolus plays a critical role in regulating cellular metabolism and growth.
核仁在调节细胞代谢和生长方面起着至关重要的作用。
In electron micrographs, the nucleolus often appears as a dense, fibrillar mass.
在电子显微照片中，核仁通常呈现为密集的纤维状团块。
Nucleolar organizers, which contain ribosomal DNA, direct the formation and function of the nucleolus.
含有核糖体DNA的核仁组织区指导着核仁的形成与功能。
Upon entering mitosis, the nucleolus disassembles to allow for proper segregation of its components during cell division.
进入有丝分裂时，核仁会解体以确保其组分在细胞分裂过程中得到适当分配。
Researchers have found that the nucleolus also has a role in stress response and the aging process.
研究人员发现核仁还在应激反应和衰老过程中发挥作用。