tuum

Erialasõnastikud

ID 461523 Viimati muudetud 07.07.2023

tuum

cell nucleus

eukarüoodi rakus paiknev suur, membraaniga ümbritsetud organell, milles sisalduv DNA on vähemal või suuremal määral pakitud kromosoomidesse

In cell biology, the nucleus is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others have many.Cell nuclei contain most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are the cell's nuclear genome and are structured in such a way to promote cell function. The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell. The main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm, and the nuclear matrix (which includes the nuclear lamina), a network within the nucleus that adds mechanical support, much like the cytoskeleton, which supports the cell as a whole.

Hea teada

Tuumas toimub RNA süntees ja selle edasine töötlemine ning ribosoomide alaühikute moodustumine.

tuum

cell nucleus

ID 460963 Viimati muudetud 07.07.2023

rakutuum

tuum

nucleus

kromosoome, teatud valke (nt transkriptsioonifaktorid) ja RNA-d sisaldav eukarüootse raku osa, mis on eraldatud tsütoplasmast kaksikmembraaniga

Nucleus is a membrane-enclosed organelle found in eukaryotic cells. It contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes.

rakutuum

tuum

nucleus

Muuttüüp 22i

tuum 'aju, üdi'
- tuma 'rakutuum'
- tuuma 'pähklituum'
- tom 'puuvilja kivi, seeme, pähklituum'

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