[Campbell Biology P.111] Which of the following statements about enantiomers is generally tr... | Practice Question

Which of the following statements about enantiomers is generally true according to the provided text?

  • A: Enantiomers are identical in their biological activity and fit into the same biological spaces.
  • B: They are mirror images that cannot be superimposed, and typically only one isomer is biologically active.
  • C: All enantiomers of a drug have equally effective pharmacological effects.
  • D: Methamphetamine's two enantiomers have similar effects, with both being highly addictive.

Explanation

Enantiomers are described as mirror images that cannot be superimposed, similar to left and right hands. The text explicitly states, 'Usually, only one isomer is biologically active because only that form can bind to specific molecules in an organism.'