A planet circling the red supergiant Betelgeuse

/in /by

A human astronaut sunbathing on a planet circling the red supergiant Betelgeuse is exposed to an excessive amount of ultraviolet radiation. What is the most likely physiological effect of this exposure:

    • Cells in his body would suffer double-stranded DNA damage activating the ATM checkpoint factor and causing G1 cell cycle arrest.
    • Cells in his body would suffer DNA cross-link damage activating the ATR checkpoint factor and causing G2 cell cycle arrest.
    • Cells in his body would suffer double-stranded DNA damage activating the ATM checkpoint factor and causing G2 cell cycle arrest.
    • Cells in his body would suffer DNA cross-link damage activating the ATR checkpoint factor and causing metaphase arrest.