Symptoms associated with which of the following diseases are due to production of an exotoxin that affects the nervous system (brain, spinal cord, nerves,
a. polio
b. botulism
c. rabies
d. variant creutzfeldt-jakob disease (vcjd)
e. the symptoms of all of these diseases are due to neurotoxin production

B

Explanation:

Botulism is a classical example of a exotoxin-mediated disease.

When C. Botulism grows in food, for example, and you eat it, it is the toxins that were produced that gives you the disease, not the bacteria per se.

A very characteristic presentation of this is infants that contract botulism from the soil (were the toxins are, but not the bacteria). Infants are much more susceptible to botulism because adults GI tract is mature enough to protect from the toxins, but infants usually cannot.

is this a psat question, if so do not cheat try your best.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).