Which of the following statements about amino acids is true?
A) They contain an amine group and a carboxyl group
B) They are normally poorly soluble in water
C) They dissolve well in hexane
D) They have no acid/base activity
E) They are one of the main constituents of carbohydrates
IMAT 2025 · Question 47
Q47 - Functional groups
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The correct answer is A) They contain an amine group and a carboxyl group.
Every amino acid has an amino group and a carboxyl group on the same carbon, plus a side chain.
They're charged in water (zwitterions), so they dissolve well in water and badly in hexane. They also act as both acid and base, so D is wrong.
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