Quiz
E.Coli Secretion
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Fragen in diesem Quiz (13)
1What is the main problem of protein translocation?
- AHydrophillic proteins must transverse two hydrophobic membranes and a hydrophillic space
- BProteins must be unfolded and refolded again
- CProteins must pass through an extremely crowded cytoplasm
2Proteins to be secreted directly after translation have a peptidase sequence at the C-terminus
- ARichtig
- BFalsch
3Which of the following parts of the peptidase sequence are closest to the N-terminus?
- AThe basic residues
- BThe hydrophobic region
- CPeptidase cleavage recognition site
4There are 1-2 basic residues in the signal sequence, but the hydrophobic sequence is variable in length
- ARichtig
- BFalsch
5When a protein is transcribed with the Peptidase signal site, what protein binds to its hydrophobic region?
- ASignal Recognition Protein
- BFtsy- a GTPase
- CSecYEG- a bacterial pore
6Ftsy transfers the protein into the pore
- ARichtig
- BFalsch
7Which of the following provide the driving force for protein translocation across the membrane
- AProtonmotive force
- BFtsY's GTPase
- CProtein translation
8What binds to the nascent polypeptide if Post-Translational Translocation takes place?
- ASecB
- BSecA
- CSecC
9Post-Translational Translocation sequences have a string of hydrophobic amino acids, same as in Translational Translocation
- ARichtig
- BFalsch
10What is the role of Sec_ ?
- ATo keep the protein in solution till it binds to SecA at the pore
- BTo fold the protein on its way to the periplasmic more
- CTo stop the protein folding on its way to SecC
11What forces are required to get a Post-Translational Translocation through the pore?
- AGTPase of FtsY
- BATP hydrolysis by SecB
- CProtonmotive Force
12Once inside the required membrane, what protein removes the peptide sequence?
- ASignal peptidase
- BSignal lyase
- CSignal Isomerase
13The protein only folds after the signal sequence is cleaved
- ARichtig
- BFalsch
Informationen
- Beschreibung
- Structural Basis for Biological Function (Protein Translocation) Quiz am E.Coli Secretion, erstellt von gina_evans0312 am 21/12/2013.
- Autor
- gina_evans0312
- Sprache
- English
- Aufrufe
- 495
- Schlagwörter
- Bewertung
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