A strain of E. coli is unable to use the UV repair pathway because of an apparent absence of DNA helicase activity. Which UV repair gene is likely mutated in this strain?
A) uvr-A
B) uvr-B
C) uvr-C
D) uvr-D
E) pol I
D
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Why might adding inorganic phosphate, to a reaction mixture where glycolysis is rapidly proceeding, help sustain the metabolic pathway?
A) It would increase the amount of glucose available for catabolism. B) It would increase the oxygen supply available for aerobic respiration because each phosphate group contains four oxygen atoms as constituents. C) The metabolic intermediates of glycolysis are phosphorylated. D) It increases the energy level of the electrons that are transferred to the electron transport chain where ATP is produced.
The first human gene therapy was approved for patients suffering ADA (adenosine deaminase) deficiency. In this therapy, lymphocytes were removed from the patient, the normal ADA gene was put into the cells, and the cells were returned to the bloodstream. How was the normal ADA put into the lymphocytes?
A. Via the polymerase chain reaction. B. By fusing normal lymphocytes with deficient lymphocytes. C. Microinjection. D. Via a plasmid vector. E. Via a viral vector.
Given a strand of DNA that "reads" GATTACGATT, what would the sequence of bases on the opposite side "read"?
What will be an ideal response?
The website www.choosemyplate.gov ________
A) helps you find restaurants online B) is a private online store selling dietary supplements C) promotes USDA's dietary guideline D) sells kitchenware