Are there ribosomes in the nucleus? Do all cells have ribosomes? Ask for an explanation

There are no ribosomes in the nucleus!

Ribosomes along with centrosomes, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, etc., all belong to organelles (which are the cells of animals).

Plant cells also have chloroplasts and large vacuoles, but higher plant cells do not contain centrosome ......

Chloroplasts and ribosomes are two different substances, and no one is ...... in whomThe nucleus is not an organelle, and of course it does not contain ribosomes.

But all of the above mentioned are ...... in the cytoplasmic matrix

Ribosomes are divided into two types:

A ribosome that is free in the matrix, and the protein synthesized is used in the ...... the cellThe other is ribosomes attached to the endoplasmic reticulum, and the synthesized proteins are secreted into the extracellular ......

No. There are large and small subunits of ribosomes in the nucleus, and there are no complete ribosomes.

After the large and small subunits of ribosomes are assembled in the nucleus, they are transported out of the nucleus through the nuclear pore and assembled into complete ribosomes in the cytoplasm for protein translation. Both large and small subunits are made up of RNA and proteins.

No. Ribosomes are mainly divided in the cytoplasm, some of them are attached to the endoplasmic reticulum, some are free in the cytoplasm, and some are also contained in the mitochondria. The synthesis of ribosomes is controlled by the nucleolus.

No, there are two states of ribosomes.

One is free in the cytoplasm but not in the nucleus, where it mainly synthesizes the structural proteins of the cell.

One is to combine with the endoplasmic reticulum to form a rough endoplasmic reticulum, which mainly synthesizes secreted proteins.

No. All cellular organisms are composed of cells, but not all biological cells have ribosomes, generally the most typical is mammalian mature red blood cells (only hemoglobin and cytoskeleton inside, no nucleus and other organelles), but it should be noted that non-mammalian mature red blood cells still have ribosomes and nuclei.

Prokaryotic cells have only one organelle, ribosomes, and do not have the multiple organelles that other eukaryotic cells have. Prokaryotic cells do not have a nuclear membrane, and the genetic material is concentrated in a region of low electron density with no clear boundaries. Prokaryotic cells are smaller, have no shaped nucleus, no chromosomes, and DNA does not bind to proteins.

Mature red blood cells of prolacts do not have a nucleus, no organelles, and no ribosomes, so in fact, many teachers are wrong, but some mammalian red blood cells have nuclei and organelles, such as camels and alpacas, and other mammalian red blood cells do not have them, which is tantamount to a large amount of hemoglobin wrapped in a cell membrane.

As long as there are cells, because they need to carry out various physiological functions... But not all,,, for example, mammalian mature red blood cells have no organelles and naturally do not contain ribosomes.

Yes, cells are divided into prokaryotic cells and eukaryotic cells, and there is a tonte for either of them.

Not necessarily, such as human mature red blood cells, roundworms.

Yes, all of them, eukaryotic prokaryotes have.

Not all cells have ribosomes, for example: mammalian mature red blood cells do not have a nucleus and do not have any organelles (including ribosomes). Ribosomes are ellipsoidal granular bodies, some attached to the outer surface of the endoplasmic reticulum membrane, some free in the cytoplasmic matrix, and are an important base for protein synthesis.

There is no universal definition of cell, but the more common formulation is that cell is the basic structural and functional unit of living organisms. It is known that all organisms except viruses are composed of cells, but the life activities of viruses must also be reflected in cells.

Generally speaking, most microorganisms such as bacteria and protozoa are composed of a single cell, that is, single-celled organisms, while higher plants and higher animals are multicellular organisms. Cells can be divided into two categories: prokaryotic cells and eukaryotic cells, but some people have proposed that they should be divided into three categories, that is, the ancient karyotic cells that originally belonged to prokaryotic cells should be separated as a parallel category. The discipline that studies cells is called cell biology.

The structure of ribosomes is significantly different from that of other organelles: they are not membrane-coated, they are composed of two subunits, and they can attach to the endoplasmic reticulum or be free of the cytoplasm because of their functional needs. Thus, ribosomes are also considered intracellular macromolecules rather than a class of organelles.

According to the number of nucleus glycosomes, they can be divided into three types: cytoplasmic ribosomes, mitochondrial ribosomes, chloroplast ribosomes, ribosomes are mainly found in the cytoplasm, rough endoplasmic reticulum.

Ribosomes, formerly known as "ribonucleosomes" or "nucleosomes", are generally considered to be an organelle in cells, with the exception of mammalian mature red blood cells and plant sieve tube round cells. In general, prokaryotic cells have only one ribosome, whereas eukaryotic cells have two types of ribosomes (where the tangerine ribosomes in the mitochondria are not the same as the cytoplasmic ribosomes).

Cytoplasm is a general term for all translucent, gelatinous, and granular substances surrounded by the cytoplasmic membrane except for the nuclear region. The water content is about 80%. The main components of cytoplasm are ribosomes, reservoirs, a variety of enzymes and intermediate metabolites, monomers of various nutrients and macromolecules, etc., and a few bacteria also have thylakoids, carboxysomes, bubbles or conesporous crystals.