A Population of T Cells Was Stimulated to Proliferate in Response

question 3

Multiple Choice

A population of T cells was stimulated to proliferate in response to a particular antigen.A sample of 1000 stimulated cells was analyzed by fluorescence-activated cell sorting (FACS) for total DNA content.Of the 1000 cells,400 had a 2n amount of DNA,200 had a 4n amount of DNA,and the remaining 400 cells had between a 2n and 4n amount of DNA.Additional immunofluorescence analysis revealed that 200 of the cells were in various stages of M phase and that M phase lasted 2 hours.What is the total length of the cell cycle?

• A)8 hours
• B)12 hours
• C)18 hours
• D)20 hours
• E)24 hours

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Definitions:

Local Governments

Administrative bodies governing smaller geographical areas within a country, responsible for local policies and regulations, typically including cities or counties.

Sales Taxes

Taxes imposed by governments on the sale of goods and services.

Regressive

A type of tax system in which the tax rate decreases as the taxable amount increases, often placing a higher burden on lower-income earners.

Inelastic Supply

A situation where the supply of a good does not significantly change when its price changes, often due to limitations in production capabilities or time constraints.