Apentix/AP Biology/Unit 1: Chemistry of Life/Question
AP Biologyeasymcq1 pt

What makes carbon uniquely suited as life's backbone element?

A.It forms four stable covalent bonds with many elements
B.It is the most abundant element in the human body
C.It forms only ionic bonds
D.It has two valence electrons

Explanation

Core Concept

Carbon's four valence electrons allow long chains, branches, rings, and double bonds — the diversity behind millions of organic compounds. No other element matches this versatility.

Correct Answer

AIt forms four stable covalent bonds with many elements

More Unit 1: Chemistry of Life practice questions

Try a random question →

Practice more AP Biology questions with full explanations

Practice Unit 1: Chemistry of Life Questions →