Which type of double-stranded break repair would you expect to be used by a cell in the G2 phase of the cell cycle?
What will be an ideal response?
synthesis-dependent strand annealing (SDSA)
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Which of the following is not true of repairing double-strand breaks by recombination?
A. After invasion of the homologous chromosome, the 3' end of the invading strand acts as a primer for DNA synthesis. B. The broken ends are processed, with the 3'-ending strand selectively degraded to create 5' overhangs. C. The 3' single strand extensions invade the homologous chromosome, displacing the homologous strand and base pairing with the complementary strand. D. As a result of the two strand invasions, the two homologues are linked at two places and are called a branched intermediate. E. The enzymes required for strand invasion belong to a class of proteins called recombinases.
Which of the following statements about fish gills is true?
A) They have a large surface area. B) Because of their efficiency, they only need a small surface area. C) They have a poor blood supply. D) Like lungs, they have an exhale/inhale function.
What term refers to specialized cells that serve as a simple excretory system in flatworms?
a. choanocytes b. cnidocytes c. tentacles d. flame cells
All of the following are phenols or phenolics, except
A. hexachlorophene. B. triclosan. C. chloramines. D. lysol. E. cresols.