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Q: How do a polypeptide get into the ER for additional processing?
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What continues and finishes some of the ER functions?

The Golgi apparatus finishes processing, modification or packaging a protein after it leaves the ER.


What is the function of Rough endoplasmic reteculume?

The rough ER is the site of protein synthesis as the ribosomes that stud it's surface put the growing polypeptide chain into the lumen of the rough ER. Also the rough ER is the site of some modifications to the protein before it goes to the Golgi body.


A system of membranes that is found in a cells cytoplasm and that assists in the processing and transport of proteins and in the production of lipids is?

The Endoplasmic Reticulum (ER). The Rough ER is attached to the nuclear membrane while the Smooth ER is not.


What is the difference between proteins made on free ribosomes and proteins made on ribosomes attached to the endoplasmic reticulum?

All proteins start out being translated on free ribosomes. Some proteins have a signal peptide sequences that will stop them from being translated on a free ribosome and send them to the ER. The ER recognizes this sequence and allows the protein to complete translation on an ER ribosome. Proteins translated on the ER, generally, are destined for the cell surface, Lysosomes, Golgi, or remain residents of the ER. Proteins that are terminally translated on free ribosomes, generally, go to the mitochondria, the nucleus, peroxisomes, or remain in the cytoplasm.


Why does the salivary gland have more rough endoplasmic reticulum?

Saliva contains many different kinds of proteins. The endoplasmic reticulum functions as a processing center for proteins. mRNA is translated to proteins on either free ribosomes or ribosomes bound to the ER, the polypeptide enters the ER where it is processed and folded correctly. It then exits and is packaged into vesicles by the Golgi apparatus. These vesicles are then released to the outside of the cell via the secretory pathway. Since the salivary gland must secrete more proteins than other cells, it makes sense that it would need more ER.


How are tRNA polypeptide and anticodon related?

how are polypeptide, and aticodon related


Is protein larger in size compared to a polypeptide?

A protein is a polypeptide.


A chain of 67amino acids would be called?

A polypeptide.


What chain is sequences of amino acids that is the foundation for the basic structure of a protein?

polypeptide chain


What is the correct order smallest to largest protein - amino acid - polypeptide?

Amino acids---->peptide---->polypeptide--->protein.


Is polypeptide an amino acid?

Polypeptide is a part of an amino acid. Check out -> Deamination.


What is composed of polysaccharide and polypeptide?

a polysaccharide is the polymer of carbohydrates and a polypeptide is the polymer of a lipid.