CAIE IGCSE Biology 17.1.6 Different Sequences of Amino Acids Questions
Practise explaining how different amino-acid sequences give protein molecules different shapes.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- explain that different sequences of amino acids give different shapes to protein molecules
CAIE IGCSE Biology 17.1.6 Different Sequences of Amino Acids Questions question 1
Fig. 2.1 shows a dwarf sunflower and a tall sunflower, Helianthus annuus. The height of the dwarf sunflower is 0.45 m and the height of the tall sunflower is 4.5 m .
not to scale
Dwarf plants like the one in Fig. 2.1 have mutant alleles.
Shoot growth in plants is controlled by auxins. An enzyme in shoot tips converts molecules of an amino acid into auxins as shown in Fig. 2.2.
Fig. 2.2
Explain how a mutation in DNA results in an abnormal enzyme which does not catalyse the reaction shown in Fig. 2.2.
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