A. What type of enzyme is used to cleave DNA?B. What type of "ends" are produced?C. How do the "ends" function in cloning DNA?
What will be an ideal response?
A. A restriction enzyme is used to cleave DNA.
B. The fragments have sticky ends.
C. Sticky ends facilitate the insertion of foreign DNA into vector DNA as long as both are cleaved by the same restriction enzyme.
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Attachment of a bacteriophage to its host requires
A. specific surface proteins on the bacteriophage and specific receptor molecules on the host cell. B. nucleic acid protein interactions. C. specific receptor molecules on the host cell. D. specific surface proteins on the bacteriophage.
Which of the following best describes the relationship between DNA, proteins, and RNA?
DNA is transcribed into RNA, then RNA is translated into proteins. DNA is transcribed into proteins, then proteins are translated into RNA. DNA is translated into RNA, then RNA is transcribed into proteins. DNA is translated into proteins, then proteins are transcribed into RNA
Why are children often told that if they eat too much candy their teeth will fall out?
A. Sugars gradually replace the tooth enamel. B. Bacteria use the sugar to make ATP. This fermentation process produces acids as a by-product. C. Sugar attacks tooth enamel. D. Bacteria secrete acids in order to digest the sugar molecules.
The probability that the daughter of a woman with a dominant disease-causing allele on one X chromosome and a normal male will be affected with the disorder is
A) 2/3. B) 1/2. C) 3/16. D) 1/3.