Cyclic AMP (cAMP) is a small molecule that associates with its binding site with a high degree of specificity. Which types of noncovalent interactions are the most important for providing the "hand in a glove" binding of cAMP?
(a) hydrogen bonds
(b) electrostatic interactions
(c) van der Waals interactions
(d) hydrophobic interactions
(a)
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Which of the following mutations can help lead to cancer?
A. Mutations to tumor suppressor genes B. Mutations to growth factors C. Mutations to proto-oncogenes D. All of the above would lead to cancer
Which of the following is not true of bubonic plague?
A. An infection can progress to septicemia. B. It is caused by Yersinia pestis. C. A patient exhibits fever, headache, nausea, and weakness. D. It is transmitted by the fecal-oral route. E. A patient often has enlarged inguinal lymph nodes.
Different organisms with an identical specific epithet, such as Drosophila melanogaster and Thamnophis melanogaster, are related to each other at the level of:
A. genus. B. specific epithet. C. species. D. No particular relationship is implied by the fact that two organisms have identical specific epithets.
Photosynthetic organisms of the open oceans are confined to the upper
A. two hundred meters. B. two hundred kilometers. C. two thousand kilometers. D. two hundred centimeters. E. two hundred millimeters.