Question

Which one of the following is an example of a neurotoxin?
(A) Cholera toxin
(B) Streptolysin-O
(C) Botulinum toxin
(D) Diphtheria toxin

Answer 1

Botulinum toxin is a neurotoxin

It binds to the synapse of motor nuerons. It cleaves the synaptic membrane protein synaptobravein thus preventing exocytosis and release of acytylcholine. As a result muscles do not contract in response to motor neuron activity and flaccid paralysis occurs.

Answer 2

c. Botulinum toxin

I hope it is the answer