MMSC490 Final Exam (With A+ Graded Answers)

The eukaryotic cell cycle is composed of four phases in the following order: a. G1; S; G2; M b. G1; G2; S; M c. G1; M; G2; S d. S; G1; G2; M correct answers A The length of time it takes for the cells labeled during DNA synthesis to begin to enter mitosis is a good estimate of the length of the _______ phase(s). a. G1 b. S c. G2 d. M correct answers C In a typical cycling mammalian cell, _______ of the cell cycle is spent in interphase. a. 99% b. 95% c. 75% d. 50% correct answers B Cell cycles of early embryonic animal cells are unusual because they have a. no G1 or G2. b. an elongated G1 and G2. c. a short S. d. a much shortened M. correct answers A The number of cells in the different phases of a population can be determined most easily by using a(n) _______ to measure the amount of DNA per cell in a large sample of cells.