Prions are are thought to cause disease by
a) rna molecules encoding toxic proteins
b) an abnormal type dramatically enhancing the rate of viral nfection
c) dna molecules .. jumping around the genome and mutating genes
d) mutant dna toxic proteins
e) abnormally shaped inducing similar but normally shaped proteins to the brain to adopt the abnormal form

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.