Which of the following is a desirable general characteristic of antimicrobial drugs?
A. Broad-spectrum of activity
B. Bactericidal rather than bacteriostatic
C. Selective toxicity
D. All of the choices are correct.
Answer: D
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By using simple microscopy techniques, it is possible to determine if a culture is contaminated with another organism
Indicate whether the statement is true or false.
Which type of medium support growth of mutant bacteria that are threonine auxotrophs?
A. Since threonine is essential for growth, threonine auxotrophs do not grow on any type of media. B. Threonine auxotrophs only grow on media that lacks threonine. C. Since threonine is essential for growth, threonine auxotrophs can grow on any type of media. D. Threonine auxotrophs only grow on media that is supplemented with threonine.
Our understanding of the evolutionary process reveals that:
a. all organisms change through time. b. all populations are related through a shared ancestry. c. evolution has produced the spectacular diversity of life on Earth. d. development has produced the spectacular diversity of life on Earth. e. all organisms change through time and all populations are related through a shared ancestry
The products of cellular respiration are
A. glucose, water, and ATP. B. carbon dioxide, glucose, and water. C. oxygen, ATP, and water. D. carbon dioxide, water, and ATP. E. glucose, carbon dioxide, and ATP.