Elements of Life

AP Biology· difficulty 1/5

Carbon is central to organic molecules because it

  • A

    Carries a permanent positive ionic charge

  • B

    Forms ionic bonds, allowing rigid skeletons

  • C

    Forms four covalent bonds, allowing diverse skeletons

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  • D

    Has six valence electrons available for bonding

Explanation

Four valence electrons → four covalent bonds → chains, rings, and branches that produce the structural diversity of life.

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