Which experiment is a genetic approach to characterize the components and the molecular mechanism of the endomembrane system?
Answer
Cell-free systems
Live-cell imaging
Pulse-chase labelling
Mutant phenotype analysis
Question 4
Question
Which experiments make use of microsomes to study the endomembrane system?
Answer
Pulse-chase labelling
Cell-free systems
Subcellular fractionation
Live-cell imaging
Question 5
Question
Which is the organelle with the largest surface area?
Answer
Golgi
Endoplasmic reticulum
Plasma membrane
Nucleus
Question 6
Question
The signal sequence is a short stretch of [blank_start]hydrophobic[blank_end] amino acids at the [blank_start]N-terminus[blank_end] of a nascent protein that serves as an [blank_start]ER-targeting[blank_end] signal.
Answer
hydrophobic
hydrophilic
N-terminus
C-terminus
ER-targeting
nuclear export
Golgi-targeting
Question 7
Question
SRP stands for "[blank_start]signal recognition particle[blank_end]".
Answer
signal recognition particle
Question 8
Question
Which of the following is a multi-protein complex with an hour-glass shaped aqueous pore?
Answer
NPC
Sec61
SRP
Proteosome
Question 9
Question
TMD stands for "[blank_start]transmembrane domain[blank_end]".
Answer
transmembrane domain
Question 10
Question
TMD is a short stretch of hydrophobic amino acids which serves as a [blank_start]stop transfer sequence[blank_end].
Answer
stop transfer sequence
Question 11
Question
UPR ([blank_start]unfolded protein response[blank_end]) initiates pathways that lead to either the production of more chaperone protein or a global reduction in protein synthesis to alleviate ER stress.
Answer
unfolded protein response
Question 12
Question
The process in which misfolded proteins are shuttled out of the ER to the [blank_start]cytosol[blank_end] where the oligosaccharide chain is removed and the protein is degraded in the [blank_start]proteasome[blank_end] is called [blank_start]ERAD[blank_end] ([blank_start]ER-associated degradation[blank_end]).
Answer
proteasome
ERAD
ER-associated degradation
cytosol
Question 13
Question
During core modification of a glycoprotein, the last remaining glucose is removed by
Answer
Glycosidase I
Glycosidase II
Glycosidase III
Calnexin
Question 14
Question
UGGT is an ER chaperone which recognizes [blank_start]hydrophobic[blank_end] regions of misfolded proteins and tags them for refolding by adding back a [blank_start]glucose[blank_end] molecule.
Answer
hydrophobic
negatively charged
hydrophilic
glucose
fatty acid
Question 15
Question
In the endomembrane system, the new membrane can only arise from the existing membrane.
Answer
True
False
Question 16
Question
According to current knowledge, which of the following are not components of the endomembrane system?