Biology 1406 Discipline Final Exam: Fall 2013 Do not write on this exam all answ
ID: 178604 • Letter: B
Question
Biology 1406 Discipline Final Exam: Fall 2013 Do not write on this exam all answers on the scantron 48. Why are viruses referred to as obligate intracellular parasites? a. They invariably kill any cell they infect b. They cannot reproduce c. They can incorporate nucleic acids from other viruses d. Viral DNA always inserts itself into host DNA e. They must use enzymes of a host cell ed by the virus itself 49. You isolate the following plasmid EcoRI EcoRI You cut the DNA to completion with and run it on a gel. Which of the lanes on the gel contains your sample? enzyme EcoRI at the positions indicated A B CD E a. Lane A b. Lane B c. Lane C d. Lane D e. Lane E Please answer question #50 in the essay section of your 886-E mini essay scranton sheet. Answers written on this exam will NOT be graded. 50. Using your knowledge of cellular respiration, explain what happens inside a human skin cell as it runs out of oxygen and dieExplanation / Answer
Answer : Question number 49
The correct option is A
Explanation : The first digestion using the EcoR1 linearises the circular plasmid where as the second cut at the other place produces two fragments of varying lenghts that results in the separation of these fragments according t their sizes resulting in two bands in the gel.
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