Question

Which of the following statements about SNARE-mediated membrane fusion are correct?

1)SNAREs from both the cell plasma membrane and the vesicle combine to form a complex that drives membrane fusion.
2)Fusion is triggered by the presence of K .
3)The lipid bilayers of the fusing membranes undergo rearrangement involving changes in membrane curvature.
4)SNAREs are peripheral membrane proteins.
5)Formation of the SNARE complexes results from changes in membrane curvature.

Answer 1

The correct statements about SNARE-mediated membrane fusion are: 1) SNAREs from both the cell plasma membrane and the vesicle combine to form a complex that drives membrane fusion. 2) The lipid bilayers of the fusing membranes undergo rearrangement involving changes in membrane curvature. 3) SNAREs are peripheral membrane proteins.

Step-by-step explanation:

The correct statements about SNARE-mediated membrane fusion are:

1. SNAREs from both the cell plasma membrane and the vesicle combine to form a complex that drives membrane fusion. V-SNARE proteins on the vesicles bind to complementary T-SNARE proteins on the target membranes, resulting in fusion.
2. The lipid bilayers of the fusing membranes undergo rearrangement involving changes in membrane curvature. Fusion is associated with changes in membrane shape and curvature.
3. SNAREs are peripheral membrane proteins. They are embedded in the membranes but do not span the entire lipid bilayer.

Answer 2

SNAREs from both the cell plasma membrane and the vesicle combine to form a complex that drives membrane fusion. The lipid bilayers of the fusing membranes undergo rearrangement involving changes in membrane curvature.

Step-by-step explanation:

Statement 1 is correct. SNAREs from both the cell plasma membrane and the vesicle combine to form a complex that drives membrane fusion.

Statement 2 is incorrect. Fusion is not triggered by the presence of K.

Statement 3 is correct. The lipid bilayers of the fusing membranes undergo rearrangement involving changes in membrane curvature.

Statement 4 is incorrect. SNAREs are transmembrane proteins, not peripheral membrane proteins.

Statement 5 is incorrect. Formation of the SNARE complexes is not primarily a result of changes in membrane curvature.