In recombinant DNA methods, the term vector can refer to _____
A) the enzyme (endonuclease) that cuts DNA into restriction fragments
B) the "sticky end" of a DNA fragment
C) a SNP marker
D) a plasmid used to transfer DNA into a living cell
E) a DNA probe used to identify a particular gene
Answer: D
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Ribosomes are directly associated with which process?
A. Transcription B. Replication C. Translocation D. Translation
Which "alternate" hypothesis might also explain industrial melanism?
A. Dark moths are more resistant to the toxic effects of pollution than light moths. B. Dark moths emigrate out of polluted areas to escape the pollution. C. Pollution kills important tree species that peppered moths depend on for egg laying. D. Because dark moths absorb more heat, they are more active and better able to avoid bird predation. E. Birds used the marks that Kettlewell placed on the moths when he released them to help them find and capture the moths. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about natural selection? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Sucrose is considered a disaccharide because:
a. It has three or more simple sugar subunits. b. It has two simple sugar subunits. c. It has ten simple sugar subunits.
Which of the following does not inhibit protein synthesis?
A. Tetracycline B. Erythromycin C. Streptomycin D. Penicillin E. All of the choices inhibit protein synthesis.