Which of the following is a process in translation in which tRNA molecules deliver amino acids in the correct sequence, causing peptide bonds to form and increasing the length of the polypeptide chain?
A) elongation B) initiation C) termination D) transcription
Answer: A
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Which of the following represents a blind study?
A. The test group does not know whether they are receiving a placebo or the actual treatment, but the researchers do. B. Neither the test group nor the researchers know whether the test group is receiving a placebo or the actual treatment until all the data are collected. C. The test group knows whether they are receiving a placebo or the actual treatment, but the researchers do not know until all the data are collected. D. The test group knows whether they are receiving a placebo or the actual treatment, and so do the researchers.
Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue. It typically happens when an area of the body is injured or damaged, and an inflammation response is required. What role would you expect cell adhesion molecules to play in this process?
A. Cell adhesion molecules help white blood cells adhere to the blood vessel wall so that they can migrate across the wall and infiltrate into the underlying tissue. B. Cell adhesion molecules will allow the white blood cells to cling to one another to form a migrating clot. C. Cell adhesion molecules will allow the white blood cells to attach to the injured area so they become immobile.
Which of the following is true of iodine?
a. Many pregnant women in the United States are likely deficient in iodine. b. Iodine toxicity significantly impairs brain development and function. c. Iodine has many well-established roles in the body. d. The majority of iodine in the American diet is provided by seafood.
In the scientific name Enterobacter aerogenes, Enterobacter is the
A) specific epithet. B) genus. C) family. D) order. E) kingdom.