24. The compound that enters the Krebs cycle and combines with oxaloacetic acid is
a. citric acid.
b. pyruvic acid.
c. acetyl-CoA.
d. phosphoglyceraldehyde.

25. Formic acid is a fermentation product of
a. Streptococcus.
b. Klebsiella.
c. Clostridium.
d. Actinomyces.

26. The central dogma concerning the flow of information from genetic material was first introduced by

a. Ernst Ruska.
b. Francis Crick.
c. Camillo Golgi.
d. Carl Bender.