To detect whether or not a cell has a specific region of a gene, researchers add radioactively labeled DNA molecules that can bind to their complementary DNA sequences. To detect a mutant version of the BLM gene, researchers added the radioactive DNA
molecule 5' - GCTAGCTAAGCCCA - 3' to cells. What DNA sequence were the researchers trying to detect?
A) 5? - GCTAGCTAAGCCCA - 3'
B) 3? - GCTAGCTAAGCCCA - 5'
C) 5? - CGATCGATTCGGGT - 3'
D) 3? - CGATCGATTCGGGT - 5'
Answer: D
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A) Prokaryotes have no DNA. B) Prokaryotes have no nucleus separating the DNA from the rest of the cell. C) Prokaryotes are unicellular, while eukaryotes are multicellular. D) Prokaryotes cause disease, but eukaryotes don't.
What is the standard method for managing the workload for fire fighters working a high-rise fire?
a. hoist, rather than carry, tools and equipment b. do not require PPE for personnel working in smoke-proof stairwells c. assign several companies to do the work normally assigned to one company d. enforce a 1:1 work time/rehabilitation time rule
Cytomegalovirus infection of the retina is now treated with (interferon/fomivirsen/ganciclovir), the first antisense RNA drug
What will be an ideal response?
Organisms that use bioluminescence to attract prey are the:
a. hatchetfish. b. anglerfish. c. stomiatoid fish d. a and b e. b and c