Multiple Choice
In a standard amino acid, what does the R group represent?
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3. Amino Acids
Amino Acid Groups
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In a standard amino acid (the building block of proteins), which set of functional groups is always present in the backbone structure?
A
An aldehyde group and a hydroxyl group
B
A ketone group and a sulfhydryl group
C
An amino group and a carboxyl group
D
A phosphate group and a methyl group
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