A pure culture contains only
A. a variety of microbes from one source.
B. bacteria.
C. one species of microorganism.
D. All of these choices are correct.
Answer: C
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Which of the following statements about enzymes is FALSE?
A. The active site of the enzyme is where the chemical reaction takes place. B. The substrate binds to the enzyme with low affinity. C. The enzyme undergoes a conformational change that brings substrates closer together in an induced fit. D. The optimal activity of an enzyme occurs over a narrow temperature range. E. The optimal activity of an enzyme occurs within a narrow pH range.
Which of the following is/are able to survive phagocytosis?
A. Brucella sp. B. Staphylococcus aureus C. Francisella tularensis D. Brucella sp AND Francisella tularensis
The process by which the base sequence of all or a portion of a DNA molecule is used to direct the synthesis of an RNA molecule is called
A. replication. B. transcription. C. translation. D. reverse transcription.
Which of these is not a eukaryote?
A) Bacteria B) Algae C) Fungi D) Protozoa E) all are eukaryotes