16. The equation used to obtain bacterial population by binary fission is
A. N = No2n
B. log N/No = (0.3010) n
C. log(N/No) = nlog 2
D. All of these
17. Bacteria and fungi multiply best
A. below 16°C
B. between 16-38°C
C. above 38°C
D. none of these
18. An organism has an optimal growth rate when the hydrogen ion concentration is very high. This organism is
A. osmotolerant
B. acidophile
C. neutrophile
D. aerotolerant anaerobe
19. Which of the following procedures uses a photocell to measure absorbance of a culture to regulate the flow of culture media?
A. Coulter Counter
B. Hemostat
C. Petroff-Hausser chamber
D. Trubidostat
20. Organisms, using organic compounds as electron donors are called
A. lithotrophs
B. phototrophs
C. chemotrophs
D. organotrophs