15. The straightforward method of binary fission explains how bacteria
A.grow in nutrient agar
B.evolve
C.move
D.reproduce

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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

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17. Bacteria and fungi multiply best
A.below 16°C
B.between 16-38°C
C.above 38°C
D.none of these

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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

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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

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20. Organisms, using organic compounds as electron donors are called
A.lithotrophs
B.phototrophs
C.chemotrophs
D.organotrophs

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21. The reproduction by budding occur in
A.Rhodopseudomonas acidophila
B.Hyphomicrobium vulgare
C.Bacillus subtilis
D.Both (a) and (b)

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