The protein dystrophin is produced ____________________
a. at the ribosomes in the cytoplasm
b. in the nucleus of the cell
c. in the Golgi complex of the cell
d. in lysosomes
A
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Nitrogen-containing bases between two complementary DNA strands are joined by
(a) polar covalent bonds. (b) hydrogen bonds. (c) phosphate groups. (d) deoxyribose sugars.
Which of the following chemicals will NOT result in a decrease in airway resistance?
A) histamine B) carbon dioxide C) epinephrine D) bronchodilators E) norepinephrine
Superstitions are:
a. proof that the scientific method is not perfect. b. held by some humans but not by any non-human species. c. true beliefs that have yet to be fully understood. d. just one of many possible forms of scientific thinking. e. irrational beliefs that actions not logically related to a course of events influence its outcome.
You are working in a cancer lab and are interested in identifying some genes that are important in the onset of lung cancer. You have several genes you think may be involved, so you "print" spots of the candidate DNA sequences on a microarray slide. After doing this, you isolate mRNA from both normal lung cells and cancerous lung cells. You make fluorescently-tagged cDNA from each mRNA sample; the cDNAs from normal cells are tagged with a green-colored molecule and the cDNAs from cancer cells are tagged with a red-colored molecule. You hybridize the cDNAs with the microarray and get the following data. (Green spots are labeled with "G", red spots are labeled with "R".)
width="330" /> McGraw-Hill EducationWhich of the following spots represent DNA that you should study further as potentially having a role in lung cancer? A. spots A1 and C6. B. spots A1, B4, B6, and C6. C. all spots except A1 and C6. D. all spots except A1, B4, B6, and C6. E. spots B4 and B6.