High concentrations of some bacteria are necessary for successful invasion because only at high density are their virulence genes expressed
Indicate whether this statement is true or false.
TRUE
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Which of the following is an intermediate in the reaction that forms Ala-tRNA?
A. Alanyl-ATP B. Alanyl-ADP C. Alanyl-PPi D. Alanyl-AMP
What is not a factor sited in the 1800s as being a reason animal life could not exist past 55 meters? a. The lack of light penetration
b. The inability to find food and mates. c. The tremendous amount of pressure. d. The consistency of the environmental conditions.
A 100 ml sample of water is filtered through a sterile membrane, and the membrane is transferred to a plate of m-Endo agar. Following overnight incubation at 37°C, 57 green metallic colonies appear. The coliform count is
A. 5700 per 100 ml. B. 0.57 per 100 ml. C. 57 per 100 ml. D. too numerous to count.
The community found on a rotting log would include:a
sunlight. b. rainwater. c. bacteria. d. gases. e. minerals.