Selenite broth serves which purpose when used in the bacterial fecal culture?
a. Evaluation of general flora and predomi-nant species
b. Selection of enteric pathogens such as Salmonella, Aeromonas, and others
c. Inhibition of normal flora and selection of enteric pathogens
d. Enrichment for enteric pathogens such as Salmonella and others
D
Enrichment broths are sometimes used for enhanced recovery of Salmonella, Shigella, Campy-lobacter, and Y. enterocolitica, although Shigella usually does not survive enrichment. Gram-negative broth (Hajna) or selenite F broth yields good recovery.
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During specialized transduction carried out by lambda phage in Escherichia coli, differences in the phage and host attachment (att) sites mediate insertion of phage DNA into host DNA.
Answer the following statement true (T) or false (F)
The anthropoids include
A. monkeys. B. humans. C. apes. D. All of the choices are correct.
When the beta cells of the pancreas release insulin into the blood, _____
A) the skeletal muscles and the adipose cells take up glucose at a faster rate B) the liver catabolizes glycogen C) the alpha cells of the pancreas release glucose into the blood D) the kidneys begin gluconeogenesis
Translation occurs in the ________ of bacteria and in the ________ of eukaryotic cells.
A. nucleus; cytoplasm B. nucleus; nucleus C. cytosol; endoplasmic reticulum D. cytoplasm; cytosol E. cytoplasm; nucleus