1. Clathrin coated vesicles are used when transporting materials: a. from the pl
ID: 53726 • Letter: 1
Question
1. Clathrin coated vesicles are used when transporting materials:
a. from the plasma membrane into the cell
b. from the cis-Golgi to the medial compartments of the Golgi
c. from the medial to the trans compartments of the Golgi
d. from the trans-Golgi to the endosome
e. answers a and d
2 What is the role of acidic hydrolases in the endomembrane system?
a.They direct proton pumps to endosomes and lysosomes.
b.They recycle mannose-6-phosphate receptors between the endosome and the TGN.
c.They capture mannose-6-phosphate tagged proteins in the extracellular space.
d.They cleave the signal sequence from proteins translocated into the ER lumen.
e.They digest material in the acidic environment created by proton pumps.
3. What would happen if a cell had mutated COPI proteins?
a.ER proteins that were accidentally carried to the Golgi complex would not return to the ER.
b.Mannose-6-phosphate would not be attached to proteins.
c.The mitotic spindle would collapse .
d.Cells would develop inclusions like those seen in I-cell disease.
e.Nothing. Nothing at all.
4. Recently, a t-SNARE was found in the outer membrane of mitochondria of a cell. What are the implications of this finding?
a.This suggests that mitochondria digest mannose-6-phosphate tagged proteins.
b.This suggests that kinesin transports vesicles from the plasma membrane to mitochondria.
c.This suggests that vesicles budding from the Golgi fuse with mitochondria.
d.This suggests that mitochondria are descendents of prokaryotes that were secreted into the extracellular space
e.This suggests that SRP binds to mitochondrial proteins.
1.Which of the following is not an example of posttranslational processing?
a.glycosylation
b.protein folding
c.5’ cap addition
d.signal sequence removal
e.disulfide bond formation
1. _____________ oligosaccharides are linked to side groups on serine and threonine residues in proteins, whereas ____________ oligosaccharides are linked to asparagines residues.
a.O-linked, N-linked
b.O-linked, N-linked
c.N-linked, O-linked
d.N-linked, N-linked
a. from the plasma membrane into the cell
b. from the cis-Golgi to the medial compartments of the Golgi
c. from the medial to the trans compartments of the Golgi
d. from the trans-Golgi to the endosome
e. answers a and d
Explanation / Answer
1.e
2. a and d
3. d
4.d and e
1. b and e
1. a and b
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.