Element Found in Proteins but Not in Carbohydrates
Puzzle 16 of Good luck Easy Pack
Question is: Element Found in Proteins but Not in Carbohydrates
and the answer is: NITROGEN
Word Meaning:
NITROGEN — (uncountable) The chemical element with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas.
Definitions from Wiktionary.