In ? phage, which protein, the product of the cI gene, blocks the transcription required to initiate the lytic cycle?
A) cro
B) repressor
C) enhancer
D) integrase
E) operator
B
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An 8-month-old female infant is admitted to the emergency department in respiratory distress on Christmas Eve. A nasopharyngeal aspirate is obtained and sent to the laboratory on ice for analy-sis. The most probable organism that would be isolated is:
a. varicella-zoster virus. b. respiratory syncytial virus (RSV). c. rotavirus. d. coxsackievirus.
The expectation of a meal normally stimulates the release of _________ into the blood, which reduces blood glucose.
What will be an ideal response?
Which of the following structures or regions is correctly paired with its function?
A) limbic system — motor control of speech B) medulla oblongata — emotional memory C) cerebellum — homeostatic control D) corpus callosum — communication between the left and right cerebral cortices
Which of the following processes requires a carrier protein?
A. exocytosis only B. facilitated diffusion only C. active transport only D. endocytosis only E. both facilitated diffusion and active transport