Multiple choice

Which scientist classified the bacteria into gram + and gram - based on the gram staining methods?

  1. Alexander Fleming

  2. Alex Paul

  3. Christian Bern

  4. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Gram staining method was developed by Hans Christian Gram in 1884. Since 'Christian Bern' is not the correct name, 'None of these' is the correct choice.