Protein Synthesis and Signal Peptide Quiz

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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?

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?

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?

In the RER (endoplasmic reticulum) Signup and view all the answers

What is the role of the signal peptide in protein synthesis?

To halt the translation by binding with the SRP Signup and view all the answers

Which molecule recognizes and binds to the signal peptide during protein synthesis?

Signal Recognition Particle (SRP) Signup and view all the answers

What happens to the ribosome when the SRP binds to the signal peptide?

It becomes membrane-bound Signup and view all the answers

What is the function of glycosylation in protein targeting?

To add sugar or carbohydrate moiety to the peptide chain Signup and view all the answers

Which part of the signal peptide serves as a cleavage site for signal peptide excision?

C-region Signup and view all the answers

What is the role of the SRP receptor at the RER membrane during protein synthesis?

To bind docking protein Signup and view all the answers

What is the role of the Signal Recognition Particle (SRP) in protein synthesis?

It binds the signal peptide and halts the translation Signup and view all the answers

What is the function of the Translocon in protein synthesis?

It facilitates the movement of ribosome to the cytoplasmic surface of ER Signup and view all the answers

What is the role of the Signal Peptide in protein synthesis?

It is involved in arresting (halting) the translation process Signup and view all the answers

What is the role of Glycosylation in protein targeting?

It adds sugar or carbohydrate moiety to the peptide chain producing glycoproteins Signup and view all the answers

What happens when SRP binds to the signal peptide during protein synthesis?

Translation process is halted Signup and view all the answers

What is the role of Glycosyltransferase enzymes in protein modification?

They transfer monosaccharides from an activated donor to an acceptor in an oligosaccharide under construction Signup and view all the answers

Where does the peptide synthesis continue after the oligosaccharide is transferred to the peptide chain?

In the endoplasmic reticulum (ER) Signup and view all the answers

What happens to the signal peptide after it is recognized and bound during protein synthesis?

It is cleaved by a signal peptidase enzyme Signup and view all the answers

What is the function of the carbohydrate moieties in protein modification?

Direct protein interactions and targeting Signup and view all the answers

What is the role of proteolytic processing in the endoplasmic reticulum (ER)?

Modifying the stability and solubility of the protein Signup and view all the answers

Protein Synthesis and Signal Peptide Quiz

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Questions and Answers

What is the role of Glycosyltransferase enzymes in protein modification?

What is the function of the signal peptidase enzyme in the ER?

What can carbohydrate moieties act as in protein modification?

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?

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 is the function of glycosylation in protein targeting?

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 Signal Recognition Particle (SRP) 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 Glycosylation in protein targeting?

What happens when SRP binds to the signal peptide during protein synthesis?

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?

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 role of proteolytic processing in the endoplasmic reticulum (ER)?

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