Question

Once the step of "docking" is done, what do T-SNARE and V-SNARE do?

a) Facilitate protein synthesis
b) Fuse vesicle membrane with target membrane
c) Regulate cellular respiration
d) Activate lysosomal enzymes

Answer 1

T-SNARE and V-SNARE proteins are responsible for fusing the vesicle membrane with the target membrane, a critical process for intracellular transport and proper cellular function.

Step-by-step explanation:

The correct answer to what T-SNARE and V-SNARE do once the step of "docking" is done is b) Fuse vesicle membrane with target membrane. These SNARE proteins facilitate the joining of the vesicle membrane with the target compartment's membrane, such as the plasma membrane or another organelle's membrane in the cell. T-SNARE (target-SNARE) proteins are usually located on the membranes of target compartments, whereas V-SNARE (vesicle-SNARE) proteins are incorporated into the membranes of transport vesicles during their formation.

During vesicle trafficking, V-SNAREs on vesicles recognize and bind to complementary T-SNAREs on target membranes. This interaction pulls the two membranes close together, leading to membrane fusion. This process is crucial for the transport of proteins and lipids within the cell, ensuring that cargo delivered by vesicles reaches the correct destination and is incorporated into the appropriate cellular membrane.