Untitled Flashcards Set

Multiple Choice Questions (MCQs)

1. Which protein is primarily responsible for vesicle docking and fusion in exocytosis?
   a. Dynamin
   b. SNARE complex
   c. Clathrin
   d. Choline acetyltransferase (ChAT)
   (Correct answer: b)

2. What is the function of synaptotagmin in exocytosis?
   a. Forms a clathrin cage
   b. Stabilizes vesicle docking
   c. Acts as a calcium sensor
   d. Degrades neurotransmitters
   (Correct answer: c)

3. Which enzyme is responsible for breaking down acetylcholine in the synaptic cleft?
   a. Acetylcholinesterase (AChE)
   b. Vesicular acetylcholine transporter (vAChT)
   c. Monoamine oxidase (MAO)
   d. Choline acetyltransferase (ChAT)
   (Correct answer: a)

4. What protein creates the proton gradient used for neurotransmitter loading into vesicles?
   a. vAChT
   b. V-ATPase
   c. SNAP-25
   d. AP2
   (Correct answer: b)

5. What role does dynamin play in endocytosis?
   a. Binds to synaptotagmin
   b. Wraps around the vesicle neck for fission
   c. Recycles choline
   d. Forms a clathrin coat
   (Correct answer: b)