A Population of T Cells Has Been Stimulated to Proliferate

question 19

Multiple Choice

A population of T cells has been stimulated to proliferate in response to a particular antigen.A sample of 1000 cells is examined microscopically,revealing that 200 of these cells are in the various stages of mitosis.Of the remaining 800 in interphase,400 have x amount of DNA,250 have 2x,and the remaining 150 have amounts somewhere between x and 2x.Additional analysis reveals that the G2 phase of the cell cycle lasts 2 hours.What is the total length of the cell cycle?

• A)2.5 hours
• B)4 hours
• C)6.4 hours
• D)8 hours
• E)13.3 hours

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