We call these unattached ribosomes free ribosomes as they are not attached to a membrane.
Free ribosomes.
Free ribosomes.
Ribosome
The RNA that exits the nuclear pores to the cytosol on its way to the ribosome is called messenger RNA (mRNA). It carries the genetic information from the DNA in the nucleus to the ribosomes for protein synthesis.
Proteins are synthesized in ribosomes, which can be found in the cytosol of a cell. Ribosomes are responsible for translating the genetic information from mRNA into protein molecules.
Indeed! After being synthesised in the nucleus, it is transported into the cytoplasm.
No. Ribosomes are classified as being either "free" or "membrane-bound". Free ribosomes can move about anywhere in the cytosol, but are excluded from the cell nucleus and other organelles. When a ribosome begins to synthesize proteins that are needed in some organelles, the ribosome making this protein can become "membrane-bound".
Yes, all protein translation occurs at the ribosomes. Those ribosomes may be free floating in the cytosol or may be studding the endoplasmic reticulum (rough ER).
Cytosol is the fluid portion of the cytoplasm surrounding the organelles. Cytosol does not actually contain organelles.
ribosomesProteins are made in ribosomes. mRNA transcribed from DNA carries the message of protein sequences. In ribosome mRNA interact with tRNAs to form polypeptides from amino acids.ribosomes translate proteins from amino acids. The message needed for the synthesis is coded in mRNA. mRNA is transcribed from DNA for this and exported to cytosol.
Cytosol!!!
Cytosol is the liquid "goo" inside a cell, and I can't think of any (eukaryotic or prokaryotic) that don't have cytosol. So yes, eukaryotic cells do contain cytosol.