Proteins are involved in all of the following roles in the body, but do not:
a. act as regulators of fluid balance.
b. form antibodies.
c. form part of cholesterol's structure.
d. act as transporters.
e. participate in cell growth and repair.

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.