Enterococcus faecalis is a gram positive fecal enterococci. If it were present in the milk samples used in this exercise, which plate(s) would it grow on?
A) Both the nutrient agar and MacConkey plates
B) Nutrient agar plates
C) MacConkey agar plates
B) Nutrient agar plates
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Which panel of the figure contains the
recombinant DNA plasmids that will be incorporated into a host cell? a. A b. B c. C d. D e. none of these
Cells conserve energy and resources by making active proteins only when they are needed. If a protein is not needed, which of the following methods of control would be the most energy efficient?
A. block transcription B. degrade the mRNA after it is made C. degrade the protein after it is made D. prevent translation of the mRNA
The original source of electrons in the photosystems is:
A) O2. B) CO2. C) NADPH. D) ATP. E) H2O.
Which factor has little effect on the rate of transpiration?
a. air temperature b. relative humidity c. air movement d. the amount of direct solar radiation e. daily fluctuations in atmospheric carbon dioxide concentrations