Question of the Day

Science·Biology·Hard HS
  1. 1.

    2- and 4-hydroxylase convert it into potent catechol derivatives

  2. 2.

    An inducible Cre-Lox system fuses Cre to a mutant T2 form of its receptor

    Cre-Lox system
  3. 3.

    DES, a synthetic analog, raised clear-cell adenocarcinoma risk in exposed daughters

  4. 4.

    Equine preparations hold equilin and equilenin; semisynthesis starts from yam diosgenin

    Premarin
  5. 5.

    The primary female sex hormones, steroids driving female secondary sex characteristics

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