Use the Figures to Answer the Question $-\mathrm{OH}$ C $-\mathrm{NH}_{2}$

question 54

Multiple Choice

Use the figures to answer the question.
A. $-\mathrm{OH}$
C. $-\mathrm{NH}_{2}$
B.
D. $-\mathrm{SH}$
Which of the functional groups shown helps stabilize proteins by forming covalent cross-links within or between protein molecules?

• A) A
• B) B
• C) C
• D) D

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