Quiz
E.Coli Secretion
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Perguntas do 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
- AVerdadeiro
- BFalso
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
- AVerdadeiro
- BFalso
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
- AVerdadeiro
- BFalso
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
- AVerdadeiro
- BFalso
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
- AVerdadeiro
- BFalso
Informações
- Descrição
- Structural Basis for Biological Function (Protein Translocation) Quiz sobre E.Coli Secretion, criado por gina_evans0312 em 21-12-2013.
- Autor
- gina_evans0312
- Idioma
- English
- Visualizações
- 495
- Etiquetas
- Avaliação
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