The function of tmRNA in bacteria is to:
A. rescue stalled ribosomes.
B. terminate translation at all stopcodons.
C. initiate translation at special start codons.
A
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What cells are phagocytes that can also present antigens to TH cells?
A. B cells B. macrophages C. plasma cells D. T cells E. monocytes
Viruses that infect bacteria are specifically called ________.
A. prions B. satellite viruses C. viroids D. bacteriophages
Which one of the following statements is TRUE regarding arterioles and arteries?
A) Arterioles and arteries transport blood from capillaries to veins. B) Blood pressure in arterioles is greater than the blood pressure in arteries. C) Arterioles are smaller and have less smooth muscle than arteries. D) Arteries do not contain valves, whereas arterioles do. E) Small sphincter muscles regulate the flow of blood from arteries into arterioles.
Suppose you have a random sample of employees in your company and their tenure. The sample mean of this sample is 4.2 years and the sample standard deviation is 4.5 years. How would knowing that the random sample was of size 100 instead of 60 change the 90% confidence interval for the population mean of employee tenure?
A. The 90% confidence interval will be biased for 100. B. The 90% confidence interval will be larger for 100 than 60. C. The 90% confidence interval will be smaller for 100 than 60. D. The 90% confidence interval will be biased for 60.