AP Biologyeasymcq1 pt
The four elements that make up about 96% of living matter are
A.carbon, hydrogen, oxygen, nitrogen
B.carbon, calcium, iron, sodium
C.oxygen, silicon, aluminum, iron
D.hydrogen, helium, carbon, oxygen
Explanation
Core Concept
CHON dominates biomass: carbon skeletons, water's hydrogen and oxygen, and nitrogen in proteins and nucleic acids. Phosphorus and sulfur add smaller shares.
Correct Answer
Acarbon, hydrogen, oxygen, nitrogen
More Unit 1: Chemistry of Life practice questions
- easyAn enzyme's function is destroyed by extreme pH. The most direct explanation is that
- easyWhat is the monomer of proteins?
- mediumBoth starch and glycogen are glucose polymers used for storage. Their structural difference is that
- easyIf a solution of a biomolecule turns a pH indicator acidic, which group is most likely present?
- easySulfur is most notably found in which biomolecules?
Practice more AP Biology questions with full explanations
Practice Unit 1: Chemistry of Life Questions →