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Questions and Answers
What is the role of Glycosyltransferase enzymes in protein modification?
What is the role of Glycosyltransferase enzymes in protein modification?
- They are involved in the removal of signal peptides from proteins
- They break down proteins into smaller peptide chains
- They facilitate the transfer of proteins from the ER lumen to the cytoplasm
- They transfer monosaccharides from an activated donor substrate to an appropriate acceptor in an oligosaccharide under construction (correct)
What is the function of the signal peptidase enzyme in the ER?
What is the function of the signal peptidase enzyme in the ER?
- It breaks down proteins into monosaccharides
- It synthesizes proteins in the ER lumen
- It removes the signal peptide from proteins after they enter the ER lumen (correct)
- It adds a signal peptide to proteins before they enter the ER lumen
What can carbohydrate moieties act as in protein modification?
What can carbohydrate moieties act as in protein modification?
- Catalysts for protein breakdown
- Blocking agents for protein synthesis
- Regulators of ribosome function
- Recognition signals directing protein interactions and targeting (correct)
Where does the synthesis of a protein get completed after glycosylation and proteolytic processing?
Where does the synthesis of a protein get completed after glycosylation and proteolytic processing?
What is the role of the signal peptide in protein synthesis?
What is the role of the signal peptide in protein synthesis?
Which molecule recognizes and binds to the signal peptide during protein synthesis?
Which molecule recognizes and binds to the signal peptide during protein synthesis?
What happens to the ribosome when the SRP binds to the signal peptide?
What happens to the ribosome when the SRP binds to the signal peptide?
What is the function of glycosylation in protein targeting?
What is the function of glycosylation in protein targeting?
Which part of the signal peptide serves as a cleavage site for signal peptide excision?
Which part of the signal peptide serves as a cleavage site for signal peptide excision?
What is the role of the SRP receptor at the RER membrane during protein synthesis?
What is the role of the SRP receptor at the RER membrane during protein synthesis?
What is the role of the Signal Recognition Particle (SRP) in protein synthesis?
What is the role of the Signal Recognition Particle (SRP) in protein synthesis?
What is the function of the Translocon in protein synthesis?
What is the function of the Translocon in protein synthesis?
What is the role of the Signal Peptide in protein synthesis?
What is the role of the Signal Peptide in protein synthesis?
What is the role of Glycosylation in protein targeting?
What is the role of Glycosylation in protein targeting?
What happens when SRP binds to the signal peptide during protein synthesis?
What happens when SRP binds to the signal peptide during protein synthesis?
What is the role of Glycosyltransferase enzymes in protein modification?
What is the role of Glycosyltransferase enzymes in protein modification?
Where does the peptide synthesis continue after the oligosaccharide is transferred to the peptide chain?
Where does the peptide synthesis continue after the oligosaccharide is transferred to the peptide chain?
What happens to the signal peptide after it is recognized and bound during protein synthesis?
What happens to the signal peptide after it is recognized and bound during protein synthesis?
What is the function of the carbohydrate moieties in protein modification?
What is the function of the carbohydrate moieties in protein modification?
What is the role of proteolytic processing in the endoplasmic reticulum (ER)?
What is the role of proteolytic processing in the endoplasmic reticulum (ER)?
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