An open system in which the growth rate is maintained by adding a nutrient (present in limiting quantities) at the same rate that medium containing microorganisms is removed is called a

A. manostat.
B. culturostat.
C. chemostat.
D. turbidostat.


Answer: C

Biology & Microbiology

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The small circular molecules of DNA commonly found in bacteria are called ________.

A. plastids B. chromatids C. plasmids D. loops

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The enzyme responsible for breaking down alcohol

is a. alcohol methylase. b. alcohol polyphosphorylase. c. hydroxyl alcoholgenase. d. transmethylogenase. e. alcohol dehydrogenase.

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Which of the following monomers is not paired correctly?

A) glucose-carbohydrates B) amino acids-proteins C) nucleotides-nucleic acids D) All of these are paired properly.

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Which of the following atoms is most likely to participate in an ionic bond?

A.) carbon, with an outer electron shell filled with four of a possible eight electrons B.) chlorine, with an outer electron shell filled with seven of a possible eight electrons C.) phosphorus, with an outer electron shell filled with five of a possible eight electrons

Biology & Microbiology