IB Biology HL B1.2.1 General Amino Acid Structure Question Bank

Practise IB Biology HL B1.2.1 by interpreting amino-acid structures and connecting functional groups and elemental composition to proteins.

Exam points

Interpret amino-acid diagrams to identify amine, carboxyl and variable R groups.
Use nitrogen and sulfur evidence to connect amino-acid composition with protein molecules.

[Maximum number: 3]

The molecules of all amino acids include an amine group, a carboxyl group and an R-group. Draw a diagram to show the structure of an amino acid molecule.

Figure for Answer to Question B1.2.1—Generalized amino acid structure question 1 — IB Biology HL

and bonded to C ;

c.

Allow a specific amino acid R -
group in marking point c, such
as $\mathrm{CH}_{3}$ (in alanine).

3
max

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B1.2.1—Generalized amino acid structure question 1