Which of the Following Atoms Can Expand Its Valence Shell

question 53

Multiple Choice

Which of the following atoms can expand its valence shell when bonding?

• A)N
• B)C
• C)O
• D)P
• E)Al

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Definitions:

ATP

See adenosine triphosphate.

Cysteine Residues

The amino acid units in proteins that contain a thiol group, often involved in the formation of disulfide bonds that stabilize protein structure.

Tertiary Structure

The three-dimensional shape of a protein molecule formed by bends and folds of its polypeptide chain.

Sulfhydryl

A functional group with the structure R-SH, where R is an organic alkyl or aryl group and SH denotes a sulfur atom bonded to a hydrogen atom, important in protein structure.