Where are ribosomes synthesized?

Answer 1

The Nucleus: contains the genes of the cell. Its size is about 5um. in diameter. It is surrounded by a lipid bilayer perforated with pores. There is a 20-40 nm. space between the layers of the membrane. Chromosomes are rod shaped structures containing DNA and protein. Chromosomes are usually broken down into chromatin. The Nucleolus is also found in the nucleus. It produces ribosomes at a rate of 10,000 / min. The nucleus controls the cell's functioning through the production of m-RNA.



Ribosomes: functions in protein synthesis. They are not considered a membrane bound organelle. Ribosomes are built from 2 subunits. Its only when these subunits are properly placed together that the ribosome becomes functional. The large subunit is composed of 45 proteins and 3 molecules of RNA while the small subunit consists of 33 proteins molecules and 1 RNA. Fully assembled it measures 20-30 nm. Sometime ribosomes work in units called polysomes.
There are 2 types of ribosomes: bound and free. The bound are found attached to the ER, while the free ones float around in the cytosol. The proteins made by the free will usually stay within the cell, while the bound are destined to become part of the membrane system or exported from the cell.

Answer 2

Ribosome Synthesis

Answer 3

None of the answers make any sense and speak to the chicken and the egg scenario. If ribosomes are needed to make proteins that are imported to the nucleolus, where do the original ribosomes come from to make more ribosomal proteins? Must be by divine intervention or another pathway. There must be 60-80 different proteins in every ribosome. In a new cell without ribosomes (yet), what makes the first proteins needed to make the first ribosome? I suspect there is at least one ribosome in every fertilized egg that fulfills the prophecy.

Answer 4

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RE:
Where are ribosomes synthesized?

Answer 5

Ribosomes are big complexes of protein and RNA molecules.
In eukaryotic cells:
Most of the ribosomal RNA is made in a specialized region of the nucleus called the nucleolus with only exception the 5s rRNA which is made in different part of the nucleus.
Proteins of the ribosome are made in the cytosol and transported in the nucleus. In the nucleus the two main subunits of the ribosome are assembled and exported separately in the cytosol where they form functional ribosomes.

Have a look for a detailed diagram in:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Search&db=books&doptcmdl=GenBookHL&term=nucleolus+ribosome+synthesis+AND+372693%5Buid%5D&rid=mboc4.figgrp.1047

Answer 6

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Ribosome is a complex of ribosomal ribonucleic acid (rRNA) and protein. The rRNA part is synthesized from the original message called DNA in the nucleus, particularly in a region called nucleolus. The protein parts come from another DNA message that specify the production of these proteins, translated to mRNA (messenger RNA, this is different RNA than those produced in nucleolus), then the mRNA is transported out of nucleus. It is translated into protein by eventually already assembled ribosome in cytoplasm. Then, the protein parts are transported back to nucleus and together with the rRNA produced in nucleolus, they are assembled into complete ribosome. These rRNA-protein complexes are then transported out of nucleus to cytoplasm, where they do their task, to synthesize protein. To simplify: DNA1 --> rRNA (nucleolus) DNA2 --> mRNA --> Protein (nucleus) (cytoplasm) Protein + rRNA --> Ribosome (nucleolus)

Answer 7

Ribosomes are made in a specialized area of the nucleus of eukaryotic cells, not in the cytosol. Check the link.

The RNA in ribosomes is transcribed in the nucleus, and the protein components are translated in the cytosol and then imported into the nucleus. They are assembled together inside the nucleus.

Answer 8

Ribosomes are made up of RNA which is synthasized in the nucleus of eukaryotic cells. They are assembled in the cytoplasm

Answer 9

Ribosomes are made in the nucleolus tho.

Answer 10

ribosome are not synthesized they are the one who will synthesized protein as commanded by ur dna!