A-LevelBiologyBiological moleculesOct/Nov 2018Paper 1 Q121 Mark
The protein glutenin gives bread dough its elasticity. The diagram represents a polypeptide of glutenin. What describes the structure of glutenin?
Aquaternary structure because there are both globular and fibrous regions
Bquaternary structure because there are both spiral and tightly coiled regions
Csecondary structure because the loose spiral is an α-helix
Dtertiary structure because the different regions form a 3D shape
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The correct answer is D. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
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