If a student wants to accurately determine the size of bacterial cells in a culture, which of the following dyes would you recommend they use?
A) Methylene blue
B) Crystal violet
C) Safranin
D) India ink
D) India ink
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In this diagram, which of the following numbers represents the actual event of egg activation?
A. I
B. II
C. III
D. IV
E. V
As new enzymes are discovered, the EC system for naming enzymes is to be used. The names are to be based on which of the following criteria?
A) the name of the substrate B) a description of substrate function C) an indication of the size of the substrate D) the six major classes of enzyme function E) the size of the enzyme
Transduction is a form of recombination in bacteria that involves ________
A) bacteriophages B) physical contact between the bacteria involved C) 5-bromouracil D) fertility factors E) plasmids
Which of the following is not true regarding the decimal reduction time?
A. Once the number of organisms has been reduced to 10%, the killing may slow due to resistant strains that remain in the population B. It is the time taken to reduce the number of pathogens in a sample by one log cycle C. It is a measure of the effective concentration of disinfectant that kills within a specific time period D. The Z value is the temperature equivalent of the D value